diff --git a/.github/ISSUE_TEMPLATE/bug_template.yml b/.github/ISSUE_TEMPLATE/bug_template.yml
index 2cd1ee8a7e688..5f0798abe0f68 100644
--- a/.github/ISSUE_TEMPLATE/bug_template.yml
+++ b/.github/ISSUE_TEMPLATE/bug_template.yml
@@ -15,7 +15,7 @@ body:
       description: Choose a specific OpenSearch component your bug belongs to.  If you are unsure which to select or if the component is not present, select "Other".
       multiple: false
       options:
-        - Other
+        - # Empty first option to force selection
         - Build
         - Clients
         - Cluster Manager
@@ -24,6 +24,7 @@ body:
         - Indexing:Replication
         - Indexing
         - Libraries
+        - Other
         - Plugins
         - Search:Aggregations
         - Search:Performance
diff --git a/.github/ISSUE_TEMPLATE/feature_request.yml b/.github/ISSUE_TEMPLATE/feature_request.yml
index d93ac8b590706..0159e771f7f80 100644
--- a/.github/ISSUE_TEMPLATE/feature_request.yml
+++ b/.github/ISSUE_TEMPLATE/feature_request.yml
@@ -22,7 +22,7 @@ body:
       description: Choose a specific OpenSearch component your feature request belongs to.  If you are unsure of which component to select or if the component is not present, select "Other".
       multiple: false
       options:
-        - Other
+        - # Empty first option to force selection
         - Build
         - Clients
         - Cluster Manager
@@ -31,6 +31,7 @@ body:
         - Indexing:Replication
         - Indexing
         - Libraries
+        - Other
         - Plugins
         - Search:Aggregations
         - Search:Performance
diff --git a/.github/workflows/links.yml b/.github/workflows/links.yml
index ca026f530b4af..2714d45bd108f 100644
--- a/.github/workflows/links.yml
+++ b/.github/workflows/links.yml
@@ -13,7 +13,7 @@ jobs:
       - uses: actions/checkout@v4
       - name: lychee Link Checker
         id: lychee
-        uses: lycheeverse/lychee-action@v1.8.0
+        uses: lycheeverse/lychee-action@v1.9.0
         with:
           args: --accept=200,403,429 --exclude-mail **/*.html **/*.md **/*.txt **/*.json --exclude-file .lychee.excludes
           fail: true
diff --git a/.github/workflows/maintainer-approval.yml b/.github/workflows/maintainer-approval.yml
index 2f87afd372d90..34e8f57cc1878 100644
--- a/.github/workflows/maintainer-approval.yml
+++ b/.github/workflows/maintainer-approval.yml
@@ -2,7 +2,6 @@ name: Maintainers approval
 
 on:
   pull_request_review:
-    types: [submitted]
 
 jobs:
   maintainer-approved-check:
@@ -26,7 +25,7 @@ jobs:
 
             return maintainersResponse.data.map(item => item.login).join(', ');
 
-      - uses: peternied/required-approval@v1.2
+      - uses: peternied/required-approval@v1.3
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           min-required: 1
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 78b22918a52be..51f904fc69f41 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -82,6 +82,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Fix compression support for h2c protocol ([#4944](https://github.com/opensearch-project/OpenSearch/pull/4944))
 - Don't over-allocate in HeapBufferedAsyncEntityConsumer in order to consume the response ([#9993](https://github.com/opensearch-project/OpenSearch/pull/9993))
 - Update supported version for max_shard_size parameter in Shrink API ([#11439](https://github.com/opensearch-project/OpenSearch/pull/11439))
+- Fix typo in API annotation check message ([11836](https://github.com/opensearch-project/OpenSearch/pull/11836))
 
 ### Security
 
@@ -100,6 +101,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Add search query categorizer ([#10255](https://github.com/opensearch-project/OpenSearch/pull/10255))
 - Per request phase latency ([#10351](https://github.com/opensearch-project/OpenSearch/issues/10351))
 - Add cluster state stats ([#10670](https://github.com/opensearch-project/OpenSearch/pull/10670))
+- [Tiered caching] Defining interfaces, listeners and extending IndicesRequestCache with Tiered cache support ([#10753]
+  (https://github.com/opensearch-project/OpenSearch/pull/10753))
 - [Remote cluster state] Restore cluster state version during remote state auto restore ([#10853](https://github.com/opensearch-project/OpenSearch/pull/10853))
 - Update the indexRandom function to create more segments for concurrent search tests ([10247](https://github.com/opensearch-project/OpenSearch/pull/10247))
 - Add support for query profiler with concurrent aggregation ([#9248](https://github.com/opensearch-project/OpenSearch/pull/9248))
@@ -107,6 +110,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Implement on behalf of token passing for extensions ([#8679](https://github.com/opensearch-project/OpenSearch/pull/8679))
 - Provide service accounts tokens to extensions ([#9618](https://github.com/opensearch-project/OpenSearch/pull/9618))
 - [Streaming Indexing] Introduce new experimental server HTTP transport based on Netty 4 and Project Reactor (Reactor Netty) ([#9672](https://github.com/opensearch-project/OpenSearch/pull/9672))
+- Enable must_exist parameter for update aliases API ([#11210](https://github.com/opensearch-project/OpenSearch/pull/11210))
 - Add back half_float BKD based sort query optimization ([#11024](https://github.com/opensearch-project/OpenSearch/pull/11024))
 - Request level coordinator slow logs ([#10650](https://github.com/opensearch-project/OpenSearch/pull/10650))
 - Add template snippets support for field and target_field in KV ingest processor ([#10040](https://github.com/opensearch-project/OpenSearch/pull/10040))
@@ -125,7 +129,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Dependencies
 - Bumps jetty version to 9.4.52.v20230823 to fix GMS-2023-1857 ([#9822](https://github.com/opensearch-project/OpenSearch/pull/9822))
 - Bump Lucene from 9.7.0 to 9.8.0 ([10276](https://github.com/opensearch-project/OpenSearch/pull/10276))
-- Bump `commons-io:commons-io` from 2.13.0 to 2.15.1 ([#10294](https://github.com/opensearch-project/OpenSearch/pull/10294), [#11001](https://github.com/opensearch-project/OpenSearch/pull/11001), [#11002](https://github.com/opensearch-project/OpenSearch/pull/11002), [#11446](https://github.com/opensearch-project/OpenSearch/pull/11446), [#11554](https://github.com/opensearch-project/OpenSearch/pull/11554), [#11560](https://github.com/opensearch-project/OpenSearch/pull/11560))
+- Bump `commons-io:commons-io` from 2.13.0 to 2.15.1 ([#10294](https://github.com/opensearch-project/OpenSearch/pull/10294), [#11001](https://github.com/opensearch-project/OpenSearch/pull/11001), [#11002](https://github.com/opensearch-project/OpenSearch/pull/11002), [#11446](https://github.com/opensearch-project/OpenSearch/pull/11446), [#11554](https://github.com/opensearch-project/OpenSearch/pull/11554), [#11560](https://github.com/opensearch-project/OpenSearch/pull/11560), [#11796](https://github.com/opensearch-project/OpenSearch/pull/11796))
 - Bump `com.google.api.grpc:proto-google-common-protos` from 2.10.0 to 2.25.1 ([#10208](https://github.com/opensearch-project/OpenSearch/pull/10208), [#10298](https://github.com/opensearch-project/OpenSearch/pull/10298))
 - Bump `com.netflix.nebula.ospackage-base` from 11.4.0 to 11.6.0 ([#10295](https://github.com/opensearch-project/OpenSearch/pull/10295), [#11630](https://github.com/opensearch-project/OpenSearch/pull/11630))
 - Bump `org.apache.zookeeper:zookeeper` from 3.9.0 to 3.9.1 ([#10506](https://github.com/opensearch-project/OpenSearch/pull/10506))
@@ -139,7 +143,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Bump `stefanzweifel/git-auto-commit-action` from 4 to 5 ([#11171](https://github.com/opensearch-project/OpenSearch/pull/11171))
 - Bump `actions/github-script` from 6 to 7 ([#11271](https://github.com/opensearch-project/OpenSearch/pull/11271))
 - Bump `jackson` and `jackson_databind` from 2.15.2 to 2.16.0 ([#11273](https://github.com/opensearch-project/OpenSearch/pull/11273))
-- Bump `netty` from 4.1.100.Final to 4.1.101.Final ([#11294](https://github.com/opensearch-project/OpenSearch/pull/11294))
+- Bump `netty` from 4.1.100.Final to 4.1.104.Final ([#11294](https://github.com/opensearch-project/OpenSearch/pull/11294), [#11775](https://github.com/opensearch-project/OpenSearch/pull/11775))
 - Bump `com.avast.gradle:gradle-docker-compose-plugin` from 0.16.12 to 0.17.6 ([#10163](https://github.com/opensearch-project/OpenSearch/pull/10163), [#11692](https://github.com/opensearch-project/OpenSearch/pull/11692))
 - Bump `com.squareup.okhttp3:okhttp` from 4.11.0 to 4.12.0 ([#10861](https://github.com/opensearch-project/OpenSearch/pull/10861))
 - Bump `org.apache.commons:commons-text` from 1.10.0 to 1.11.0 ([#11344](https://github.com/opensearch-project/OpenSearch/pull/11344))
@@ -159,6 +163,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Bump `com.maxmind.geoip2:geoip2` from 4.1.0 to 4.2.0 ([#11559](https://github.com/opensearch-project/OpenSearch/pull/11559))
 - Bump `org.apache.commons:commons-lang3` from 3.13.0 to 3.14.0 ([#11691](https://github.com/opensearch-project/OpenSearch/pull/11691))
 - Bump `com.maxmind.db:maxmind-db` from 3.0.0 to 3.1.0 ([#11693](https://github.com/opensearch-project/OpenSearch/pull/11693))
+- Bump `net.java.dev.jna:jna` from 5.13.0 to 5.14.0 ([#11798](https://github.com/opensearch-project/OpenSearch/pull/11798))
+- Bump `lycheeverse/lychee-action` from 1.8.0 to 1.9.0 ([#11795](https://github.com/opensearch-project/OpenSearch/pull/11795))
+- Bump `Lucene` from 9.8.0 to 9.9.1 ([#11421](https://github.com/opensearch-project/OpenSearch/pull/11421))
 
 ### Changed
 - Mute the query profile IT with concurrent execution ([#9840](https://github.com/opensearch-project/OpenSearch/pull/9840))
@@ -185,6 +192,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Restore support for Java 8 for RestClient ([#11562](https://github.com/opensearch-project/OpenSearch/pull/11562))
 - Add deleted doc count in _cat/shards ([#11678](https://github.com/opensearch-project/OpenSearch/pull/11678))
 - Refactor QueryCollectorContext to improve extensibility ([#11778](https://github.com/opensearch-project/OpenSearch/pull/11778))
+- Capture information for additional query types and aggregation types ([#11582](https://github.com/opensearch-project/OpenSearch/pull/11582))
 
 ### Deprecated
 
@@ -211,6 +219,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Fix template setting override for replication type ([#11417](https://github.com/opensearch-project/OpenSearch/pull/11417))
 - Fix Automatic addition of protocol broken in #11512 ([#11609](https://github.com/opensearch-project/OpenSearch/pull/11609))
 - Fix issue when calling Delete PIT endpoint and no PITs exist ([#11711](https://github.com/opensearch-project/OpenSearch/pull/11711))
+- Fix tracing context propagation for local transport instrumentation ([#11490](https://github.com/opensearch-project/OpenSearch/pull/11490))
+- Fix parsing of single line comments in `lang-painless` ([#11815](https://github.com/opensearch-project/OpenSearch/issues/11815))
 
 ### Security
 
diff --git a/buildSrc/build.gradle b/buildSrc/build.gradle
index a42976fef572c..3c846b48549fb 100644
--- a/buildSrc/build.gradle
+++ b/buildSrc/build.gradle
@@ -110,7 +110,7 @@ dependencies {
   api 'com.netflix.nebula:gradle-info-plugin:12.1.6'
   api 'org.apache.rat:apache-rat:0.15'
   api 'commons-io:commons-io:2.15.1'
-  api "net.java.dev.jna:jna:5.13.0"
+  api "net.java.dev.jna:jna:5.14.0"
   api 'com.github.johnrengelman:shadow:8.1.1'
   api 'org.jdom:jdom2:2.0.6.1'
   api "org.jetbrains.kotlin:kotlin-stdlib-jdk8:${props.getProperty('kotlin')}"
diff --git a/buildSrc/version.properties b/buildSrc/version.properties
index 74d655cfb1045..eceb08c05953d 100644
--- a/buildSrc/version.properties
+++ b/buildSrc/version.properties
@@ -1,5 +1,5 @@
 opensearch        = 3.0.0
-lucene            = 9.8.0
+lucene            = 9.9.1
 
 bundled_jdk_vendor = adoptium
 bundled_jdk = 21.0.1+12
@@ -26,7 +26,7 @@ jakarta_annotation = 1.3.5
 # when updating the JNA version, also update the version in buildSrc/build.gradle
 jna               = 5.13.0
 
-netty             = 4.1.101.Final
+netty             = 4.1.104.Final
 joda              = 2.12.2
 
 # project reactor
diff --git a/libs/common/src/main/java/org/opensearch/common/annotation/processor/ApiAnnotationProcessor.java b/libs/common/src/main/java/org/opensearch/common/annotation/processor/ApiAnnotationProcessor.java
index 1864aec4aa951..569f48a8465f3 100644
--- a/libs/common/src/main/java/org/opensearch/common/annotation/processor/ApiAnnotationProcessor.java
+++ b/libs/common/src/main/java/org/opensearch/common/annotation/processor/ApiAnnotationProcessor.java
@@ -113,7 +113,7 @@ private void process(ExecutableElement executable, Element enclosing) {
         // The executable element should not be internal (unless constructor for injectable core component)
         checkNotInternal(enclosing, executable);
 
-        // Check this elements annotations
+        // Check this element's annotations
         for (final AnnotationMirror annotation : executable.getAnnotationMirrors()) {
             final Element element = annotation.getAnnotationType().asElement();
             if (inspectable(element)) {
@@ -210,7 +210,7 @@ private void process(ExecutableElement executable, ReferenceType ref) {
             }
         }
 
-        // Check this elements annotations
+        // Check this element's annotations
         for (final AnnotationMirror annotation : ref.getAnnotationMirrors()) {
             final Element element = annotation.getAnnotationType().asElement();
             if (inspectable(element)) {
@@ -316,7 +316,7 @@ private void checkPublic(@Nullable Element referencedBy, final Element element)
                     reportFailureAs,
                     "The element "
                         + element
-                        + " is part of the public APIs but is not maked as @PublicApi, @ExperimentalApi or @DeprecatedApi"
+                        + " is part of the public APIs but is not marked as @PublicApi, @ExperimentalApi or @DeprecatedApi"
                         + ((referencedBy != null) ? " (referenced by " + referencedBy + ") " : "")
                 );
         }
diff --git a/libs/common/src/test/java/org/opensearch/common/annotation/processor/ApiAnnotationProcessorTests.java b/libs/common/src/test/java/org/opensearch/common/annotation/processor/ApiAnnotationProcessorTests.java
index df04709458b29..8d8a4c7895339 100644
--- a/libs/common/src/test/java/org/opensearch/common/annotation/processor/ApiAnnotationProcessorTests.java
+++ b/libs/common/src/test/java/org/opensearch/common/annotation/processor/ApiAnnotationProcessorTests.java
@@ -35,7 +35,7 @@ public void testPublicApiMethodArgumentNotAnnotated() {
                 matching(
                     Diagnostic.Kind.ERROR,
                     containsString(
-                        "The element org.opensearch.common.annotation.processor.NotAnnotated is part of the public APIs but is not maked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
+                        "The element org.opensearch.common.annotation.processor.NotAnnotated is part of the public APIs but is not marked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
                             + "(referenced by org.opensearch.common.annotation.processor.PublicApiMethodArgumentNotAnnotated)"
                     )
                 )
@@ -56,7 +56,7 @@ public void testPublicApiMethodArgumentNotAnnotatedGenerics() {
                 matching(
                     Diagnostic.Kind.ERROR,
                     containsString(
-                        "The element org.opensearch.common.annotation.processor.NotAnnotated is part of the public APIs but is not maked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
+                        "The element org.opensearch.common.annotation.processor.NotAnnotated is part of the public APIs but is not marked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
                             + "(referenced by org.opensearch.common.annotation.processor.PublicApiMethodArgumentNotAnnotatedGenerics)"
                     )
                 )
@@ -77,7 +77,7 @@ public void testPublicApiMethodThrowsNotAnnotated() {
                 matching(
                     Diagnostic.Kind.ERROR,
                     containsString(
-                        "The element org.opensearch.common.annotation.processor.NotAnnotatedException is part of the public APIs but is not maked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
+                        "The element org.opensearch.common.annotation.processor.NotAnnotatedException is part of the public APIs but is not marked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
                             + "(referenced by org.opensearch.common.annotation.processor.PublicApiMethodThrowsNotAnnotated)"
                     )
                 )
@@ -111,7 +111,7 @@ public void testPublicApiMethodArgumentNotAnnotatedPackagePrivate() {
                 matching(
                     Diagnostic.Kind.ERROR,
                     containsString(
-                        "The element org.opensearch.common.annotation.processor.NotAnnotatedPackagePrivate is part of the public APIs but is not maked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
+                        "The element org.opensearch.common.annotation.processor.NotAnnotatedPackagePrivate is part of the public APIs but is not marked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
                             + "(referenced by org.opensearch.common.annotation.processor.PublicApiMethodArgumentNotAnnotatedPackagePrivate)"
                     )
                 )
@@ -209,7 +209,7 @@ public void testPublicApiMethodReturnNotAnnotated() {
                 matching(
                     Diagnostic.Kind.ERROR,
                     containsString(
-                        "The element org.opensearch.common.annotation.processor.NotAnnotated is part of the public APIs but is not maked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
+                        "The element org.opensearch.common.annotation.processor.NotAnnotated is part of the public APIs but is not marked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
                             + "(referenced by org.opensearch.common.annotation.processor.PublicApiMethodReturnNotAnnotated)"
                     )
                 )
@@ -230,7 +230,7 @@ public void testPublicApiMethodReturnNotAnnotatedGenerics() {
                 matching(
                     Diagnostic.Kind.ERROR,
                     containsString(
-                        "The element org.opensearch.common.annotation.processor.NotAnnotated is part of the public APIs but is not maked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
+                        "The element org.opensearch.common.annotation.processor.NotAnnotated is part of the public APIs but is not marked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
                             + "(referenced by org.opensearch.common.annotation.processor.PublicApiMethodReturnNotAnnotatedGenerics)"
                     )
                 )
@@ -251,7 +251,7 @@ public void testPublicApiMethodReturnNotAnnotatedArray() {
                 matching(
                     Diagnostic.Kind.ERROR,
                     containsString(
-                        "The element org.opensearch.common.annotation.processor.NotAnnotated is part of the public APIs but is not maked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
+                        "The element org.opensearch.common.annotation.processor.NotAnnotated is part of the public APIs but is not marked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
                             + "(referenced by org.opensearch.common.annotation.processor.PublicApiMethodReturnNotAnnotatedArray)"
                     )
                 )
@@ -272,7 +272,7 @@ public void testPublicApiMethodReturnNotAnnotatedBoundedGenerics() {
                 matching(
                     Diagnostic.Kind.ERROR,
                     containsString(
-                        "The element org.opensearch.common.annotation.processor.NotAnnotated is part of the public APIs but is not maked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
+                        "The element org.opensearch.common.annotation.processor.NotAnnotated is part of the public APIs but is not marked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
                             + "(referenced by org.opensearch.common.annotation.processor.PublicApiMethodReturnNotAnnotatedBoundedGenerics)"
                     )
                 )
@@ -297,7 +297,7 @@ public void testPublicApiMethodReturnNotAnnotatedAnnotation() {
                 matching(
                     Diagnostic.Kind.ERROR,
                     containsString(
-                        "The element org.opensearch.common.annotation.processor.NotAnnotatedAnnotation is part of the public APIs but is not maked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
+                        "The element org.opensearch.common.annotation.processor.NotAnnotatedAnnotation is part of the public APIs but is not marked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
                             + "(referenced by org.opensearch.common.annotation.processor.PublicApiMethodReturnNotAnnotatedAnnotation)"
                     )
                 )
@@ -388,7 +388,7 @@ public void testPublicApiMethodGenericsArgumentNotAnnotated() {
                 matching(
                     Diagnostic.Kind.ERROR,
                     containsString(
-                        "The element org.opensearch.common.annotation.processor.NotAnnotated is part of the public APIs but is not maked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
+                        "The element org.opensearch.common.annotation.processor.NotAnnotated is part of the public APIs but is not marked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
                             + "(referenced by org.opensearch.common.annotation.processor.PublicApiMethodGenericsArgumentNotAnnotated)"
                     )
                 )
@@ -453,7 +453,7 @@ public void testPublicApiMethodReturnAnnotatedGenerics() {
                 matching(
                     Diagnostic.Kind.ERROR,
                     containsString(
-                        "The element org.opensearch.common.annotation.processor.NotAnnotatedAnnotation is part of the public APIs but is not maked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
+                        "The element org.opensearch.common.annotation.processor.NotAnnotatedAnnotation is part of the public APIs but is not marked as @PublicApi, @ExperimentalApi or @DeprecatedApi "
                             + "(referenced by org.opensearch.common.annotation.processor.PublicApiMethodReturnAnnotatedGenerics)"
                     )
                 )
diff --git a/libs/core/licenses/lucene-core-9.8.0.jar.sha1 b/libs/core/licenses/lucene-core-9.8.0.jar.sha1
deleted file mode 100644
index f9a3e2f3cbee6..0000000000000
--- a/libs/core/licenses/lucene-core-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-5e8421c5f8573bcf22e9265fc7e19469545a775a
\ No newline at end of file
diff --git a/libs/core/licenses/lucene-core-9.9.1.jar.sha1 b/libs/core/licenses/lucene-core-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..ae596196d9e6a
--- /dev/null
+++ b/libs/core/licenses/lucene-core-9.9.1.jar.sha1
@@ -0,0 +1 @@
+55249fa9a0ed321adcf8283c6f3b649a6812b0a9
\ No newline at end of file
diff --git a/libs/core/src/main/java/org/opensearch/Version.java b/libs/core/src/main/java/org/opensearch/Version.java
index d94be3f25b53d..6a92993f5dd42 100644
--- a/libs/core/src/main/java/org/opensearch/Version.java
+++ b/libs/core/src/main/java/org/opensearch/Version.java
@@ -98,8 +98,8 @@ public class Version implements Comparable<Version>, ToXContentFragment {
     public static final Version V_2_11_0 = new Version(2110099, org.apache.lucene.util.Version.LUCENE_9_7_0);
     public static final Version V_2_11_1 = new Version(2110199, org.apache.lucene.util.Version.LUCENE_9_7_0);
     public static final Version V_2_11_2 = new Version(2110299, org.apache.lucene.util.Version.LUCENE_9_7_0);
-    public static final Version V_2_12_0 = new Version(2120099, org.apache.lucene.util.Version.LUCENE_9_8_0);
-    public static final Version V_3_0_0 = new Version(3000099, org.apache.lucene.util.Version.LUCENE_9_8_0);
+    public static final Version V_2_12_0 = new Version(2120099, org.apache.lucene.util.Version.LUCENE_9_9_1);
+    public static final Version V_3_0_0 = new Version(3000099, org.apache.lucene.util.Version.LUCENE_9_9_1);
     public static final Version CURRENT = V_3_0_0;
 
     public static Version fromId(int id) {
diff --git a/modules/ingest-common/src/main/java/org/opensearch/ingest/common/ScriptProcessor.java b/modules/ingest-common/src/main/java/org/opensearch/ingest/common/ScriptProcessor.java
index cc8889af27621..d1b4a0961b7bd 100644
--- a/modules/ingest-common/src/main/java/org/opensearch/ingest/common/ScriptProcessor.java
+++ b/modules/ingest-common/src/main/java/org/opensearch/ingest/common/ScriptProcessor.java
@@ -102,8 +102,11 @@ public IngestDocument execute(IngestDocument document) {
         } else {
             ingestScript = precompiledIngestScript;
         }
-        ingestScript.execute(document.getSourceAndMetadata());
-        CollectionUtils.ensureNoSelfReferences(document.getSourceAndMetadata(), "ingest script");
+        IngestDocument mutableDocument = new IngestDocument(document);
+        ingestScript.execute(mutableDocument.getSourceAndMetadata());
+        CollectionUtils.ensureNoSelfReferences(mutableDocument.getSourceAndMetadata(), "ingest script");
+        document.getSourceAndMetadata().clear();
+        document.getSourceAndMetadata().putAll(mutableDocument.getSourceAndMetadata());
         return document;
     }
 
diff --git a/modules/ingest-common/src/test/java/org/opensearch/ingest/common/ScriptProcessorTests.java b/modules/ingest-common/src/test/java/org/opensearch/ingest/common/ScriptProcessorTests.java
index 96d9be75c4ab7..e900458e361ce 100644
--- a/modules/ingest-common/src/test/java/org/opensearch/ingest/common/ScriptProcessorTests.java
+++ b/modules/ingest-common/src/test/java/org/opensearch/ingest/common/ScriptProcessorTests.java
@@ -105,4 +105,16 @@ private void assertIngestDocument(IngestDocument ingestDocument) {
         int bytesTotal = ingestDocument.getFieldValue("bytes_in", Integer.class) + ingestDocument.getFieldValue("bytes_out", Integer.class);
         assertThat(ingestDocument.getSourceAndMetadata().get("bytes_total"), is(bytesTotal));
     }
+
+    public void testScriptingWithSelfReferencingSourceMetadata() {
+        ScriptProcessor processor = new ScriptProcessor(randomAlphaOfLength(10), null, script, null, scriptService);
+        IngestDocument originalIngestDocument = randomDocument();
+        String index = originalIngestDocument.getSourceAndMetadata().get(IngestDocument.Metadata.INDEX.getFieldName()).toString();
+        String id = originalIngestDocument.getSourceAndMetadata().get(IngestDocument.Metadata.ID.getFieldName()).toString();
+        Map<String, Object> sourceMetadata = originalIngestDocument.getSourceAndMetadata();
+        originalIngestDocument.getSourceAndMetadata().put("_source", sourceMetadata);
+        IngestDocument ingestDocument = new IngestDocument(index, id, null, null, null, originalIngestDocument.getSourceAndMetadata());
+        expectThrows(IllegalArgumentException.class, () -> processor.execute(ingestDocument));
+    }
+
 }
diff --git a/modules/ingest-common/src/yamlRestTest/resources/rest-api-spec/test/ingest/190_script_processor.yml b/modules/ingest-common/src/yamlRestTest/resources/rest-api-spec/test/ingest/190_script_processor.yml
index 3230fb37b43f7..a66f02d6b6a6d 100644
--- a/modules/ingest-common/src/yamlRestTest/resources/rest-api-spec/test/ingest/190_script_processor.yml
+++ b/modules/ingest-common/src/yamlRestTest/resources/rest-api-spec/test/ingest/190_script_processor.yml
@@ -202,3 +202,79 @@ teardown:
         id: 1
   - match: { _source.source_field: "foo%20bar" }
   - match: { _source.target_field: "foo bar" }
+
+---
+"Test self referencing source with ignore failure":
+  - do:
+      ingest.put_pipeline:
+        id: "my_pipeline"
+        body:  >
+          {
+            "description": "_description",
+            "processors": [
+              {
+                "script" : {
+                  "lang": "painless",
+                  "source" : "ctx.foo['foo']=ctx.foo;ctx['test-field']='test-value'",
+                  "ignore_failure": true
+                }
+              },
+              {
+                "script" : {
+                  "lang": "painless",
+                  "source" : "ctx.target_field = Processors.uppercase(ctx.source_field)"
+                }
+              }
+            ]
+          }
+  - match: { acknowledged: true }
+
+  - do:
+      index:
+        index: test
+        id: 1
+        pipeline: "my_pipeline"
+        body: {source_field: "fooBar", foo: {foo: "bar"}}
+
+  - do:
+      get:
+        index: test
+        id: 1
+  - match: { _source.source_field: "fooBar" }
+  - match: { _source.target_field: "FOOBAR"}
+  - match: { _source.test-field: null}
+
+---
+"Test self referencing source without ignoring failure":
+  - do:
+      ingest.put_pipeline:
+        id: "my_pipeline"
+        body:  >
+          {
+            "description": "_description",
+            "processors": [
+              {
+                "script" : {
+                  "lang": "painless",
+                  "source" : "ctx.foo['foo']=ctx.foo;ctx['test-field']='test-value'"
+                }
+              },
+              {
+                "script" : {
+                  "lang": "painless",
+                  "source" : "ctx.target_field = Processors.uppercase(ctx.source_field)"
+                }
+              }
+            ]
+          }
+  - match: { acknowledged: true }
+
+  - do:
+      catch: bad_request
+      index:
+        index: test
+        id: 1
+        pipeline: "my_pipeline"
+        body: {source_field: "fooBar", foo: {foo: "bar"}}
+  - match: { error.root_cause.0.type: "illegal_argument_exception" }
+  - match: { error.root_cause.0.reason: "Iterable object is self-referencing itself (ingest script)" }
diff --git a/modules/ingest-common/src/yamlRestTest/resources/rest-api-spec/test/ingest/90_simulate.yml b/modules/ingest-common/src/yamlRestTest/resources/rest-api-spec/test/ingest/90_simulate.yml
index 7c073739f6a1f..edd649a310d42 100644
--- a/modules/ingest-common/src/yamlRestTest/resources/rest-api-spec/test/ingest/90_simulate.yml
+++ b/modules/ingest-common/src/yamlRestTest/resources/rest-api-spec/test/ingest/90_simulate.yml
@@ -1113,3 +1113,48 @@ teardown:
   - match: { status: 400 }
   - match: { error.root_cause.0.type: "illegal_argument_exception" }
   - match: { error.root_cause.0.reason: "Failed to parse parameter [_if_primary_term], only int or long is accepted" }
+
+---
+"Test simulate with pipeline with ignore failure and cyclic field assignments in script":
+  - do:
+      ingest.simulate:
+        verbose: true
+        body: >
+          {
+            "pipeline": {
+              "description": "_description",
+              "processors": [
+                {
+                  "script" : {
+                    "ignore_failure" : true,
+                    "lang": "painless",
+                    "source": "ctx.foo['foo']=ctx.foo;ctx.tag='recursive'"
+                  }
+                },
+                {
+                  "script" : {
+                    "lang": "painless",
+                    "source" : "ctx.target_field = Processors.uppercase(ctx.foo.foo)"
+                  }
+                }
+              ]
+            },
+            "docs": [
+              {
+                "_source": {
+                  "foo": {
+                    "foo": "bar"
+                  }
+                }
+              }
+            ]
+          }
+  - length: { docs: 1 }
+  - length: { docs.0.processor_results: 2 }
+  - match: { docs.0.processor_results.0.status: "error_ignored" }
+  - match: { docs.0.processor_results.0.ignored_error.error.type: "illegal_argument_exception" }
+  - match: { docs.0.processor_results.0.doc._source.tag: null }
+  - match: { docs.0.processor_results.1.doc._source.target_field: "BAR" }
+  - match: { docs.0.processor_results.1.doc._source.foo.foo: "bar" }
+  - match: { docs.0.processor_results.1.status: "success" }
+  - match: { docs.0.processor_results.1.processor_type: "script" }
diff --git a/modules/lang-expression/licenses/lucene-expressions-9.8.0.jar.sha1 b/modules/lang-expression/licenses/lucene-expressions-9.8.0.jar.sha1
deleted file mode 100644
index 892865a017f48..0000000000000
--- a/modules/lang-expression/licenses/lucene-expressions-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-7725476acfcb9bdfeff1b813ce15c39c6b857dc2
\ No newline at end of file
diff --git a/modules/lang-expression/licenses/lucene-expressions-9.9.1.jar.sha1 b/modules/lang-expression/licenses/lucene-expressions-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..402cc36ba3d68
--- /dev/null
+++ b/modules/lang-expression/licenses/lucene-expressions-9.9.1.jar.sha1
@@ -0,0 +1 @@
+1782a69d0e83af9cc3c65db0dcd2e7e7c1e5f90e
\ No newline at end of file
diff --git a/modules/lang-painless/src/main/antlr/PainlessLexer.g4 b/modules/lang-painless/src/main/antlr/PainlessLexer.g4
index 21b03b85d8edd..69b789dd2aa25 100644
--- a/modules/lang-painless/src/main/antlr/PainlessLexer.g4
+++ b/modules/lang-painless/src/main/antlr/PainlessLexer.g4
@@ -25,7 +25,7 @@ protected abstract boolean isSlashRegex();
 }
 
 WS: [ \t\n\r]+ -> skip;
-COMMENT: ( '//' .*? [\n\r] | '/*' .*? '*/' ) -> skip;
+COMMENT: ( '//' ~[\n\r]* | '/*' .*? '*/' ) -> skip;
 
 LBRACK:    '{';
 RBRACK:    '}';
diff --git a/modules/lang-painless/src/main/java/org/opensearch/painless/antlr/PainlessLexer.java b/modules/lang-painless/src/main/java/org/opensearch/painless/antlr/PainlessLexer.java
index fb33cf6e2a6f5..260a2fc0c062c 100644
--- a/modules/lang-painless/src/main/java/org/opensearch/painless/antlr/PainlessLexer.java
+++ b/modules/lang-painless/src/main/java/org/opensearch/painless/antlr/PainlessLexer.java
@@ -435,7 +435,7 @@ private boolean REGEX_sempred(RuleContext _localctx, int predIndex) {
         return true;
     }
 
-    public static final String _serializedATN = "\u0004\u0000U\u0278\u0006\uffff\uffff\u0006\uffff\uffff\u0002\u0000\u0007"
+    public static final String _serializedATN = "\u0004\u0000U\u0277\u0006\uffff\uffff\u0006\uffff\uffff\u0002\u0000\u0007"
         + "\u0000\u0002\u0001\u0007\u0001\u0002\u0002\u0007\u0002\u0002\u0003\u0007"
         + "\u0003\u0002\u0004\u0007\u0004\u0002\u0005\u0007\u0005\u0002\u0006\u0007"
         + "\u0006\u0002\u0007\u0007\u0007\u0002\b\u0007\b\u0002\t\u0007\t\u0002\n"
@@ -459,381 +459,381 @@ private boolean REGEX_sempred(RuleContext _localctx, int predIndex) {
         + "R\u0007R\u0002S\u0007S\u0002T\u0007T\u0001\u0000\u0004\u0000\u00ae\b\u0000"
         + "\u000b\u0000\f\u0000\u00af\u0001\u0000\u0001\u0000\u0001\u0001\u0001\u0001"
         + "\u0001\u0001\u0001\u0001\u0005\u0001\u00b8\b\u0001\n\u0001\f\u0001\u00bb"
-        + "\t\u0001\u0001\u0001\u0001\u0001\u0001\u0001\u0001\u0001\u0001\u0001\u0005"
-        + "\u0001\u00c2\b\u0001\n\u0001\f\u0001\u00c5\t\u0001\u0001\u0001\u0001\u0001"
-        + "\u0003\u0001\u00c9\b\u0001\u0001\u0001\u0001\u0001\u0001\u0002\u0001\u0002"
-        + "\u0001\u0003\u0001\u0003\u0001\u0004\u0001\u0004\u0001\u0005\u0001\u0005"
-        + "\u0001\u0006\u0001\u0006\u0001\u0007\u0001\u0007\u0001\b\u0001\b\u0001"
-        + "\b\u0001\b\u0001\t\u0001\t\u0001\t\u0001\t\u0001\t\u0001\n\u0001\n\u0001"
-        + "\u000b\u0001\u000b\u0001\f\u0001\f\u0001\f\u0001\r\u0001\r\u0001\r\u0001"
-        + "\u000e\u0001\u000e\u0001\u000e\u0001\u000e\u0001\u000e\u0001\u000f\u0001"
-        + "\u000f\u0001\u000f\u0001\u000f\u0001\u000f\u0001\u000f\u0001\u0010\u0001"
-        + "\u0010\u0001\u0010\u0001\u0011\u0001\u0011\u0001\u0011\u0001\u0011\u0001"
-        + "\u0012\u0001\u0012\u0001\u0012\u0001\u0012\u0001\u0012\u0001\u0012\u0001"
-        + "\u0012\u0001\u0012\u0001\u0012\u0001\u0013\u0001\u0013\u0001\u0013\u0001"
-        + "\u0013\u0001\u0013\u0001\u0013\u0001\u0014\u0001\u0014\u0001\u0014\u0001"
-        + "\u0014\u0001\u0014\u0001\u0014\u0001\u0014\u0001\u0015\u0001\u0015\u0001"
-        + "\u0015\u0001\u0015\u0001\u0016\u0001\u0016\u0001\u0016\u0001\u0016\u0001"
-        + "\u0017\u0001\u0017\u0001\u0017\u0001\u0017\u0001\u0017\u0001\u0017\u0001"
-        + "\u0018\u0001\u0018\u0001\u0018\u0001\u0018\u0001\u0018\u0001\u0018\u0001"
-        + "\u0019\u0001\u0019\u0001\u0019\u0001\u0019\u0001\u0019\u0001\u001a\u0001"
-        + "\u001a\u0001\u001a\u0001\u001a\u0001\u001a\u0001\u001a\u0001\u001a\u0001"
-        + "\u001a\u0001\u001a\u0001\u001a\u0001\u001a\u0001\u001b\u0001\u001b\u0001"
-        + "\u001c\u0001\u001c\u0001\u001d\u0001\u001d\u0001\u001e\u0001\u001e\u0001"
-        + "\u001e\u0001\u001f\u0001\u001f\u0001 \u0001 \u0001!\u0001!\u0001\"\u0001"
-        + "\"\u0001\"\u0001#\u0001#\u0001#\u0001$\u0001$\u0001$\u0001$\u0001%\u0001"
-        + "%\u0001&\u0001&\u0001&\u0001\'\u0001\'\u0001(\u0001(\u0001(\u0001)\u0001"
-        + ")\u0001)\u0001*\u0001*\u0001*\u0001*\u0001+\u0001+\u0001+\u0001,\u0001"
-        + ",\u0001,\u0001,\u0001-\u0001-\u0001.\u0001.\u0001/\u0001/\u00010\u0001"
-        + "0\u00010\u00011\u00011\u00011\u00012\u00012\u00013\u00013\u00014\u0001"
-        + "4\u00014\u00015\u00015\u00015\u00016\u00016\u00016\u00017\u00017\u0001"
-        + "7\u00018\u00018\u00018\u00018\u00019\u00019\u00019\u0001:\u0001:\u0001"
-        + ":\u0001;\u0001;\u0001<\u0001<\u0001<\u0001=\u0001=\u0001=\u0001>\u0001"
-        + ">\u0001>\u0001?\u0001?\u0001?\u0001@\u0001@\u0001@\u0001A\u0001A\u0001"
-        + "A\u0001B\u0001B\u0001B\u0001C\u0001C\u0001C\u0001D\u0001D\u0001D\u0001"
-        + "D\u0001E\u0001E\u0001E\u0001E\u0001F\u0001F\u0001F\u0001F\u0001F\u0001"
-        + "G\u0001G\u0004G\u01b8\bG\u000bG\fG\u01b9\u0001G\u0003G\u01bd\bG\u0001"
-        + "H\u0001H\u0001H\u0004H\u01c2\bH\u000bH\fH\u01c3\u0001H\u0003H\u01c7\b"
-        + "H\u0001I\u0001I\u0001I\u0005I\u01cc\bI\nI\fI\u01cf\tI\u0003I\u01d1\bI"
-        + "\u0001I\u0003I\u01d4\bI\u0001J\u0001J\u0001J\u0005J\u01d9\bJ\nJ\fJ\u01dc"
-        + "\tJ\u0003J\u01de\bJ\u0001J\u0001J\u0004J\u01e2\bJ\u000bJ\fJ\u01e3\u0003"
-        + "J\u01e6\bJ\u0001J\u0001J\u0003J\u01ea\bJ\u0001J\u0004J\u01ed\bJ\u000b"
-        + "J\fJ\u01ee\u0003J\u01f1\bJ\u0001J\u0003J\u01f4\bJ\u0001K\u0001K\u0001"
-        + "K\u0001K\u0001K\u0001K\u0005K\u01fc\bK\nK\fK\u01ff\tK\u0001K\u0001K\u0001"
-        + "K\u0001K\u0001K\u0001K\u0001K\u0005K\u0208\bK\nK\fK\u020b\tK\u0001K\u0003"
-        + "K\u020e\bK\u0001L\u0001L\u0001L\u0001L\u0004L\u0214\bL\u000bL\fL\u0215"
-        + "\u0001L\u0001L\u0005L\u021a\bL\nL\fL\u021d\tL\u0001L\u0001L\u0001M\u0001"
-        + "M\u0001M\u0001M\u0001M\u0001N\u0001N\u0001N\u0001N\u0001N\u0001N\u0001"
-        + "O\u0001O\u0001O\u0001O\u0001O\u0001P\u0001P\u0001P\u0001P\u0001P\u0001"
+        + "\t\u0001\u0001\u0001\u0001\u0001\u0001\u0001\u0001\u0001\u0005\u0001\u00c1"
+        + "\b\u0001\n\u0001\f\u0001\u00c4\t\u0001\u0001\u0001\u0001\u0001\u0003\u0001"
+        + "\u00c8\b\u0001\u0001\u0001\u0001\u0001\u0001\u0002\u0001\u0002\u0001\u0003"
+        + "\u0001\u0003\u0001\u0004\u0001\u0004\u0001\u0005\u0001\u0005\u0001\u0006"
+        + "\u0001\u0006\u0001\u0007\u0001\u0007\u0001\b\u0001\b\u0001\b\u0001\b\u0001"
+        + "\t\u0001\t\u0001\t\u0001\t\u0001\t\u0001\n\u0001\n\u0001\u000b\u0001\u000b"
+        + "\u0001\f\u0001\f\u0001\f\u0001\r\u0001\r\u0001\r\u0001\u000e\u0001\u000e"
+        + "\u0001\u000e\u0001\u000e\u0001\u000e\u0001\u000f\u0001\u000f\u0001\u000f"
+        + "\u0001\u000f\u0001\u000f\u0001\u000f\u0001\u0010\u0001\u0010\u0001\u0010"
+        + "\u0001\u0011\u0001\u0011\u0001\u0011\u0001\u0011\u0001\u0012\u0001\u0012"
+        + "\u0001\u0012\u0001\u0012\u0001\u0012\u0001\u0012\u0001\u0012\u0001\u0012"
+        + "\u0001\u0012\u0001\u0013\u0001\u0013\u0001\u0013\u0001\u0013\u0001\u0013"
+        + "\u0001\u0013\u0001\u0014\u0001\u0014\u0001\u0014\u0001\u0014\u0001\u0014"
+        + "\u0001\u0014\u0001\u0014\u0001\u0015\u0001\u0015\u0001\u0015\u0001\u0015"
+        + "\u0001\u0016\u0001\u0016\u0001\u0016\u0001\u0016\u0001\u0017\u0001\u0017"
+        + "\u0001\u0017\u0001\u0017\u0001\u0017\u0001\u0017\u0001\u0018\u0001\u0018"
+        + "\u0001\u0018\u0001\u0018\u0001\u0018\u0001\u0018\u0001\u0019\u0001\u0019"
+        + "\u0001\u0019\u0001\u0019\u0001\u0019\u0001\u001a\u0001\u001a\u0001\u001a"
+        + "\u0001\u001a\u0001\u001a\u0001\u001a\u0001\u001a\u0001\u001a\u0001\u001a"
+        + "\u0001\u001a\u0001\u001a\u0001\u001b\u0001\u001b\u0001\u001c\u0001\u001c"
+        + "\u0001\u001d\u0001\u001d\u0001\u001e\u0001\u001e\u0001\u001e\u0001\u001f"
+        + "\u0001\u001f\u0001 \u0001 \u0001!\u0001!\u0001\"\u0001\"\u0001\"\u0001"
+        + "#\u0001#\u0001#\u0001$\u0001$\u0001$\u0001$\u0001%\u0001%\u0001&\u0001"
+        + "&\u0001&\u0001\'\u0001\'\u0001(\u0001(\u0001(\u0001)\u0001)\u0001)\u0001"
+        + "*\u0001*\u0001*\u0001*\u0001+\u0001+\u0001+\u0001,\u0001,\u0001,\u0001"
+        + ",\u0001-\u0001-\u0001.\u0001.\u0001/\u0001/\u00010\u00010\u00010\u0001"
+        + "1\u00011\u00011\u00012\u00012\u00013\u00013\u00014\u00014\u00014\u0001"
+        + "5\u00015\u00015\u00016\u00016\u00016\u00017\u00017\u00017\u00018\u0001"
+        + "8\u00018\u00018\u00019\u00019\u00019\u0001:\u0001:\u0001:\u0001;\u0001"
+        + ";\u0001<\u0001<\u0001<\u0001=\u0001=\u0001=\u0001>\u0001>\u0001>\u0001"
+        + "?\u0001?\u0001?\u0001@\u0001@\u0001@\u0001A\u0001A\u0001A\u0001B\u0001"
+        + "B\u0001B\u0001C\u0001C\u0001C\u0001D\u0001D\u0001D\u0001D\u0001E\u0001"
+        + "E\u0001E\u0001E\u0001F\u0001F\u0001F\u0001F\u0001F\u0001G\u0001G\u0004"
+        + "G\u01b7\bG\u000bG\fG\u01b8\u0001G\u0003G\u01bc\bG\u0001H\u0001H\u0001"
+        + "H\u0004H\u01c1\bH\u000bH\fH\u01c2\u0001H\u0003H\u01c6\bH\u0001I\u0001"
+        + "I\u0001I\u0005I\u01cb\bI\nI\fI\u01ce\tI\u0003I\u01d0\bI\u0001I\u0003I"
+        + "\u01d3\bI\u0001J\u0001J\u0001J\u0005J\u01d8\bJ\nJ\fJ\u01db\tJ\u0003J\u01dd"
+        + "\bJ\u0001J\u0001J\u0004J\u01e1\bJ\u000bJ\fJ\u01e2\u0003J\u01e5\bJ\u0001"
+        + "J\u0001J\u0003J\u01e9\bJ\u0001J\u0004J\u01ec\bJ\u000bJ\fJ\u01ed\u0003"
+        + "J\u01f0\bJ\u0001J\u0003J\u01f3\bJ\u0001K\u0001K\u0001K\u0001K\u0001K\u0001"
+        + "K\u0005K\u01fb\bK\nK\fK\u01fe\tK\u0001K\u0001K\u0001K\u0001K\u0001K\u0001"
+        + "K\u0001K\u0005K\u0207\bK\nK\fK\u020a\tK\u0001K\u0003K\u020d\bK\u0001L"
+        + "\u0001L\u0001L\u0001L\u0004L\u0213\bL\u000bL\fL\u0214\u0001L\u0001L\u0005"
+        + "L\u0219\bL\nL\fL\u021c\tL\u0001L\u0001L\u0001M\u0001M\u0001M\u0001M\u0001"
+        + "M\u0001N\u0001N\u0001N\u0001N\u0001N\u0001N\u0001O\u0001O\u0001O\u0001"
+        + "O\u0001O\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001"
         + "P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001"
         + "P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001"
-        + "P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001"
-        + "P\u0001P\u0001P\u0003P\u0257\bP\u0001Q\u0001Q\u0001Q\u0001Q\u0001R\u0001"
-        + "R\u0005R\u025f\bR\nR\fR\u0262\tR\u0001S\u0001S\u0001S\u0005S\u0267\bS"
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-        + "\u0000\u015cU\u0001\u0000\u0000\u0000\u015d\u015e\u0005=\u0000\u0000\u015e"
-        + "\u015f\u0005=\u0000\u0000\u015f\u0160\u0005=\u0000\u0000\u0160W\u0001"
-        + "\u0000\u0000\u0000\u0161\u0162\u0005!\u0000\u0000\u0162\u0163\u0005=\u0000"
-        + "\u0000\u0163Y\u0001\u0000\u0000\u0000\u0164\u0165\u0005!\u0000\u0000\u0165"
-        + "\u0166\u0005=\u0000\u0000\u0166\u0167\u0005=\u0000\u0000\u0167[\u0001"
-        + "\u0000\u0000\u0000\u0168\u0169\u0005&\u0000\u0000\u0169]\u0001\u0000\u0000"
-        + "\u0000\u016a\u016b\u0005^\u0000\u0000\u016b_\u0001\u0000\u0000\u0000\u016c"
-        + "\u016d\u0005|\u0000\u0000\u016da\u0001\u0000\u0000\u0000\u016e\u016f\u0005"
-        + "&\u0000\u0000\u016f\u0170\u0005&\u0000\u0000\u0170c\u0001\u0000\u0000"
-        + "\u0000\u0171\u0172\u0005|\u0000\u0000\u0172\u0173\u0005|\u0000\u0000\u0173"
-        + "e\u0001\u0000\u0000\u0000\u0174\u0175\u0005?\u0000\u0000\u0175g\u0001"
-        + "\u0000\u0000\u0000\u0176\u0177\u0005:\u0000\u0000\u0177i\u0001\u0000\u0000"
-        + "\u0000\u0178\u0179\u0005?\u0000\u0000\u0179\u017a\u0005:\u0000\u0000\u017a"
-        + "k\u0001\u0000\u0000\u0000\u017b\u017c\u0005:\u0000\u0000\u017c\u017d\u0005"
-        + ":\u0000\u0000\u017dm\u0001\u0000\u0000\u0000\u017e\u017f\u0005-\u0000"
-        + "\u0000\u017f\u0180\u0005>\u0000\u0000\u0180o\u0001\u0000\u0000\u0000\u0181"
-        + "\u0182\u0005=\u0000\u0000\u0182\u0183\u0005~\u0000\u0000\u0183q\u0001"
-        + "\u0000\u0000\u0000\u0184\u0185\u0005=\u0000\u0000\u0185\u0186\u0005=\u0000"
-        + "\u0000\u0186\u0187\u0005~\u0000\u0000\u0187s\u0001\u0000\u0000\u0000\u0188"
-        + "\u0189\u0005+\u0000\u0000\u0189\u018a\u0005+\u0000\u0000\u018au\u0001"
-        + "\u0000\u0000\u0000\u018b\u018c\u0005-\u0000\u0000\u018c\u018d\u0005-\u0000"
-        + "\u0000\u018dw\u0001\u0000\u0000\u0000\u018e\u018f\u0005=\u0000\u0000\u018f"
-        + "y\u0001\u0000\u0000\u0000\u0190\u0191\u0005+\u0000\u0000\u0191\u0192\u0005"
-        + "=\u0000\u0000\u0192{\u0001\u0000\u0000\u0000\u0193\u0194\u0005-\u0000"
-        + "\u0000\u0194\u0195\u0005=\u0000\u0000\u0195}\u0001\u0000\u0000\u0000\u0196"
-        + "\u0197\u0005*\u0000\u0000\u0197\u0198\u0005=\u0000\u0000\u0198\u007f\u0001"
-        + "\u0000\u0000\u0000\u0199\u019a\u0005/\u0000\u0000\u019a\u019b\u0005=\u0000"
-        + "\u0000\u019b\u0081\u0001\u0000\u0000\u0000\u019c\u019d\u0005%\u0000\u0000"
-        + "\u019d\u019e\u0005=\u0000\u0000\u019e\u0083\u0001\u0000\u0000\u0000\u019f"
-        + "\u01a0\u0005&\u0000\u0000\u01a0\u01a1\u0005=\u0000\u0000\u01a1\u0085\u0001"
-        + "\u0000\u0000\u0000\u01a2\u01a3\u0005^\u0000\u0000\u01a3\u01a4\u0005=\u0000"
-        + "\u0000\u01a4\u0087\u0001\u0000\u0000\u0000\u01a5\u01a6\u0005|\u0000\u0000"
-        + "\u01a6\u01a7\u0005=\u0000\u0000\u01a7\u0089\u0001\u0000\u0000\u0000\u01a8"
-        + "\u01a9\u0005<\u0000\u0000\u01a9\u01aa\u0005<\u0000\u0000\u01aa\u01ab\u0005"
-        + "=\u0000\u0000\u01ab\u008b\u0001\u0000\u0000\u0000\u01ac\u01ad\u0005>\u0000"
-        + "\u0000\u01ad\u01ae\u0005>\u0000\u0000\u01ae\u01af\u0005=\u0000\u0000\u01af"
-        + "\u008d\u0001\u0000\u0000\u0000\u01b0\u01b1\u0005>\u0000\u0000\u01b1\u01b2"
-        + "\u0005>\u0000\u0000\u01b2\u01b3\u0005>\u0000\u0000\u01b3\u01b4\u0005="
-        + "\u0000\u0000\u01b4\u008f\u0001\u0000\u0000\u0000\u01b5\u01b7\u00050\u0000"
-        + "\u0000\u01b6\u01b8\u0007\u0002\u0000\u0000\u01b7\u01b6\u0001\u0000\u0000"
-        + "\u0000\u01b8\u01b9\u0001\u0000\u0000\u0000\u01b9\u01b7\u0001\u0000\u0000"
-        + "\u0000\u01b9\u01ba\u0001\u0000\u0000\u0000\u01ba\u01bc\u0001\u0000\u0000"
-        + "\u0000\u01bb\u01bd\u0007\u0003\u0000\u0000\u01bc\u01bb\u0001\u0000\u0000"
-        + "\u0000\u01bc\u01bd\u0001\u0000\u0000\u0000\u01bd\u0091\u0001\u0000\u0000"
-        + "\u0000\u01be\u01bf\u00050\u0000\u0000\u01bf\u01c1\u0007\u0004\u0000\u0000"
-        + "\u01c0\u01c2\u0007\u0005\u0000\u0000\u01c1\u01c0\u0001\u0000\u0000\u0000"
-        + "\u01c2\u01c3\u0001\u0000\u0000\u0000\u01c3\u01c1\u0001\u0000\u0000\u0000"
-        + "\u01c3\u01c4\u0001\u0000\u0000\u0000\u01c4\u01c6\u0001\u0000\u0000\u0000"
-        + "\u01c5\u01c7\u0007\u0003\u0000\u0000\u01c6\u01c5\u0001\u0000\u0000\u0000"
-        + "\u01c6\u01c7\u0001\u0000\u0000\u0000\u01c7\u0093\u0001\u0000\u0000\u0000"
-        + "\u01c8\u01d1\u00050\u0000\u0000\u01c9\u01cd\u0007\u0006\u0000\u0000\u01ca"
-        + "\u01cc\u0007\u0007\u0000\u0000\u01cb\u01ca\u0001\u0000\u0000\u0000\u01cc"
-        + "\u01cf\u0001\u0000\u0000\u0000\u01cd\u01cb\u0001\u0000\u0000\u0000\u01cd"
-        + "\u01ce\u0001\u0000\u0000\u0000\u01ce\u01d1\u0001\u0000\u0000\u0000\u01cf"
-        + "\u01cd\u0001\u0000\u0000\u0000\u01d0\u01c8\u0001\u0000\u0000\u0000\u01d0"
-        + "\u01c9\u0001\u0000\u0000\u0000\u01d1\u01d3\u0001\u0000\u0000\u0000\u01d2"
-        + "\u01d4\u0007\b\u0000\u0000\u01d3\u01d2\u0001\u0000\u0000\u0000\u01d3\u01d4"
-        + "\u0001\u0000\u0000\u0000\u01d4\u0095\u0001\u0000\u0000\u0000\u01d5\u01de"
-        + "\u00050\u0000\u0000\u01d6\u01da\u0007\u0006\u0000\u0000\u01d7\u01d9\u0007"
-        + "\u0007\u0000\u0000\u01d8\u01d7\u0001\u0000\u0000\u0000\u01d9\u01dc\u0001"
-        + "\u0000\u0000\u0000\u01da\u01d8\u0001\u0000\u0000\u0000\u01da\u01db\u0001"
-        + "\u0000\u0000\u0000\u01db\u01de\u0001\u0000\u0000\u0000\u01dc\u01da\u0001"
-        + "\u0000\u0000\u0000\u01dd\u01d5\u0001\u0000\u0000\u0000\u01dd\u01d6\u0001"
-        + "\u0000\u0000\u0000\u01de\u01e5\u0001\u0000\u0000\u0000\u01df\u01e1\u0003"
-        + "\u0012\b\u0000\u01e0\u01e2\u0007\u0007\u0000\u0000\u01e1\u01e0\u0001\u0000"
-        + "\u0000\u0000\u01e2\u01e3\u0001\u0000\u0000\u0000\u01e3\u01e1\u0001\u0000"
-        + "\u0000\u0000\u01e3\u01e4\u0001\u0000\u0000\u0000\u01e4\u01e6\u0001\u0000"
-        + "\u0000\u0000\u01e5\u01df\u0001\u0000\u0000\u0000\u01e5\u01e6\u0001\u0000"
-        + "\u0000\u0000\u01e6\u01f0\u0001\u0000\u0000\u0000\u01e7\u01e9\u0007\t\u0000"
-        + "\u0000\u01e8\u01ea\u0007\n\u0000\u0000\u01e9\u01e8\u0001\u0000\u0000\u0000"
-        + "\u01e9\u01ea\u0001\u0000\u0000\u0000\u01ea\u01ec\u0001\u0000\u0000\u0000"
-        + "\u01eb\u01ed\u0007\u0007\u0000\u0000\u01ec\u01eb\u0001\u0000\u0000\u0000"
-        + "\u01ed\u01ee\u0001\u0000\u0000\u0000\u01ee\u01ec\u0001\u0000\u0000\u0000"
-        + "\u01ee\u01ef\u0001\u0000\u0000\u0000\u01ef\u01f1\u0001\u0000\u0000\u0000"
-        + "\u01f0\u01e7\u0001\u0000\u0000\u0000\u01f0\u01f1\u0001\u0000\u0000\u0000"
-        + "\u01f1\u01f3\u0001\u0000\u0000\u0000\u01f2\u01f4\u0007\u000b\u0000\u0000"
-        + "\u01f3\u01f2\u0001\u0000\u0000\u0000\u01f3\u01f4\u0001\u0000\u0000\u0000"
-        + "\u01f4\u0097\u0001\u0000\u0000\u0000\u01f5\u01fd\u0005\"\u0000\u0000\u01f6"
-        + "\u01f7\u0005\\\u0000\u0000\u01f7\u01fc\u0005\"\u0000\u0000\u01f8\u01f9"
-        + "\u0005\\\u0000\u0000\u01f9\u01fc\u0005\\\u0000\u0000\u01fa\u01fc\b\f\u0000"
-        + "\u0000\u01fb\u01f6\u0001\u0000\u0000\u0000\u01fb\u01f8\u0001\u0000\u0000"
-        + "\u0000\u01fb\u01fa\u0001\u0000\u0000\u0000\u01fc\u01ff\u0001\u0000\u0000"
-        + "\u0000\u01fd\u01fe\u0001\u0000\u0000\u0000\u01fd\u01fb\u0001\u0000\u0000"
-        + "\u0000\u01fe\u0200\u0001\u0000\u0000\u0000\u01ff\u01fd\u0001\u0000\u0000"
-        + "\u0000\u0200\u020e\u0005\"\u0000\u0000\u0201\u0209\u0005\'\u0000\u0000"
-        + "\u0202\u0203\u0005\\\u0000\u0000\u0203\u0208\u0005\'\u0000\u0000\u0204"
-        + "\u0205\u0005\\\u0000\u0000\u0205\u0208\u0005\\\u0000\u0000\u0206\u0208"
-        + "\b\r\u0000\u0000\u0207\u0202\u0001\u0000\u0000\u0000\u0207\u0204\u0001"
-        + "\u0000\u0000\u0000\u0207\u0206\u0001\u0000\u0000\u0000\u0208\u020b\u0001"
-        + "\u0000\u0000\u0000\u0209\u020a\u0001\u0000\u0000\u0000\u0209\u0207\u0001"
-        + "\u0000\u0000\u0000\u020a\u020c\u0001\u0000\u0000\u0000\u020b\u0209\u0001"
-        + "\u0000\u0000\u0000\u020c\u020e\u0005\'\u0000\u0000\u020d\u01f5\u0001\u0000"
-        + "\u0000\u0000\u020d\u0201\u0001\u0000\u0000\u0000\u020e\u0099\u0001\u0000"
-        + "\u0000\u0000\u020f\u0213\u0005/\u0000\u0000\u0210\u0211\u0005\\\u0000"
-        + "\u0000\u0211\u0214\b\u000e\u0000\u0000\u0212\u0214\b\u000f\u0000\u0000"
-        + "\u0213\u0210\u0001\u0000\u0000\u0000\u0213\u0212\u0001\u0000\u0000\u0000"
-        + "\u0214\u0215\u0001\u0000\u0000\u0000\u0215\u0216\u0001\u0000\u0000\u0000"
-        + "\u0215\u0213\u0001\u0000\u0000\u0000\u0216\u0217\u0001\u0000\u0000\u0000"
-        + "\u0217\u021b\u0005/\u0000\u0000\u0218\u021a\u0007\u0010\u0000\u0000\u0219"
-        + "\u0218\u0001\u0000\u0000\u0000\u021a\u021d\u0001\u0000\u0000\u0000\u021b"
-        + "\u0219\u0001\u0000\u0000\u0000\u021b\u021c\u0001\u0000\u0000\u0000\u021c"
-        + "\u021e\u0001\u0000\u0000\u0000\u021d\u021b\u0001\u0000\u0000\u0000\u021e"
-        + "\u021f\u0004L\u0001\u0000\u021f\u009b\u0001\u0000\u0000\u0000\u0220\u0221"
-        + "\u0005t\u0000\u0000\u0221\u0222\u0005r\u0000\u0000\u0222\u0223\u0005u"
-        + "\u0000\u0000\u0223\u0224\u0005e\u0000\u0000\u0224\u009d\u0001\u0000\u0000"
-        + "\u0000\u0225\u0226\u0005f\u0000\u0000\u0226\u0227\u0005a\u0000\u0000\u0227"
-        + "\u0228\u0005l\u0000\u0000\u0228\u0229\u0005s\u0000\u0000\u0229\u022a\u0005"
-        + "e\u0000\u0000\u022a\u009f\u0001\u0000\u0000\u0000\u022b\u022c\u0005n\u0000"
-        + "\u0000\u022c\u022d\u0005u\u0000\u0000\u022d\u022e\u0005l\u0000\u0000\u022e"
-        + "\u022f\u0005l\u0000\u0000\u022f\u00a1\u0001\u0000\u0000\u0000\u0230\u0231"
-        + "\u0005b\u0000\u0000\u0231\u0232\u0005o\u0000\u0000\u0232\u0233\u0005o"
-        + "\u0000\u0000\u0233\u0234\u0005l\u0000\u0000\u0234\u0235\u0005e\u0000\u0000"
-        + "\u0235\u0236\u0005a\u0000\u0000\u0236\u0257\u0005n\u0000\u0000\u0237\u0238"
-        + "\u0005b\u0000\u0000\u0238\u0239\u0005y\u0000\u0000\u0239\u023a\u0005t"
-        + "\u0000\u0000\u023a\u0257\u0005e\u0000\u0000\u023b\u023c\u0005s\u0000\u0000"
-        + "\u023c\u023d\u0005h\u0000\u0000\u023d\u023e\u0005o\u0000\u0000\u023e\u023f"
-        + "\u0005r\u0000\u0000\u023f\u0257\u0005t\u0000\u0000\u0240\u0241\u0005c"
-        + "\u0000\u0000\u0241\u0242\u0005h\u0000\u0000\u0242\u0243\u0005a\u0000\u0000"
-        + "\u0243\u0257\u0005r\u0000\u0000\u0244\u0245\u0005i\u0000\u0000\u0245\u0246"
-        + "\u0005n\u0000\u0000\u0246\u0257\u0005t\u0000\u0000\u0247\u0248\u0005l"
-        + "\u0000\u0000\u0248\u0249\u0005o\u0000\u0000\u0249\u024a\u0005n\u0000\u0000"
-        + "\u024a\u0257\u0005g\u0000\u0000\u024b\u024c\u0005f\u0000\u0000\u024c\u024d"
-        + "\u0005l\u0000\u0000\u024d\u024e\u0005o\u0000\u0000\u024e\u024f\u0005a"
-        + "\u0000\u0000\u024f\u0257\u0005t\u0000\u0000\u0250\u0251\u0005d\u0000\u0000"
-        + "\u0251\u0252\u0005o\u0000\u0000\u0252\u0253\u0005u\u0000\u0000\u0253\u0254"
-        + "\u0005b\u0000\u0000\u0254\u0255\u0005l\u0000\u0000\u0255\u0257\u0005e"
-        + "\u0000\u0000\u0256\u0230\u0001\u0000\u0000\u0000\u0256\u0237\u0001\u0000"
-        + "\u0000\u0000\u0256\u023b\u0001\u0000\u0000\u0000\u0256\u0240\u0001\u0000"
-        + "\u0000\u0000\u0256\u0244\u0001\u0000\u0000\u0000\u0256\u0247\u0001\u0000"
-        + "\u0000\u0000\u0256\u024b\u0001\u0000\u0000\u0000\u0256\u0250\u0001\u0000"
-        + "\u0000\u0000\u0257\u00a3\u0001\u0000\u0000\u0000\u0258\u0259\u0005d\u0000"
-        + "\u0000\u0259\u025a\u0005e\u0000\u0000\u025a\u025b\u0005f\u0000\u0000\u025b"
-        + "\u00a5\u0001\u0000\u0000\u0000\u025c\u0260\u0007\u0011\u0000\u0000\u025d"
-        + "\u025f\u0007\u0012\u0000\u0000\u025e\u025d\u0001\u0000\u0000\u0000\u025f"
-        + "\u0262\u0001\u0000\u0000\u0000\u0260\u025e\u0001\u0000\u0000\u0000\u0260"
-        + "\u0261\u0001\u0000\u0000\u0000\u0261\u00a7\u0001\u0000\u0000\u0000\u0262"
-        + "\u0260\u0001\u0000\u0000\u0000\u0263\u026c\u00050\u0000\u0000\u0264\u0268"
-        + "\u0007\u0006\u0000\u0000\u0265\u0267\u0007\u0007\u0000\u0000\u0266\u0265"
-        + "\u0001\u0000\u0000\u0000\u0267\u026a\u0001\u0000\u0000\u0000\u0268\u0266"
-        + "\u0001\u0000\u0000\u0000\u0268\u0269\u0001\u0000\u0000\u0000\u0269\u026c"
-        + "\u0001\u0000\u0000\u0000\u026a\u0268\u0001\u0000\u0000\u0000\u026b\u0263"
-        + "\u0001\u0000\u0000\u0000\u026b\u0264\u0001\u0000\u0000\u0000\u026c\u026d"
-        + "\u0001\u0000\u0000\u0000\u026d\u026e\u0006S\u0002\u0000\u026e\u00a9\u0001"
-        + "\u0000\u0000\u0000\u026f\u0273\u0007\u0011\u0000\u0000\u0270\u0272\u0007"
-        + "\u0012\u0000\u0000\u0271\u0270\u0001\u0000\u0000\u0000\u0272\u0275\u0001"
-        + "\u0000\u0000\u0000\u0273\u0271\u0001\u0000\u0000\u0000\u0273\u0274\u0001"
-        + "\u0000\u0000\u0000\u0274\u0276\u0001\u0000\u0000\u0000\u0275\u0273\u0001"
-        + "\u0000\u0000\u0000\u0276\u0277\u0006T\u0002\u0000\u0277\u00ab\u0001\u0000"
-        + "\u0000\u0000\"\u0000\u0001\u00af\u00b9\u00c3\u00c8\u01b9\u01bc\u01c3\u01c6"
-        + "\u01cd\u01d0\u01d3\u01da\u01dd\u01e3\u01e5\u01e9\u01ee\u01f0\u01f3\u01fb"
-        + "\u01fd\u0207\u0209\u020d\u0213\u0215\u021b\u0256\u0260\u0268\u026b\u0273"
-        + "\u0003\u0006\u0000\u0000\u0002\u0001\u0000\u0002\u0000\u0000";
+        + "P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0001P\u0003"
+        + "P\u0256\bP\u0001Q\u0001Q\u0001Q\u0001Q\u0001R\u0001R\u0005R\u025e\bR\n"
+        + "R\fR\u0261\tR\u0001S\u0001S\u0001S\u0005S\u0266\bS\nS\fS\u0269\tS\u0003"
+        + "S\u026b\bS\u0001S\u0001S\u0001T\u0001T\u0005T\u0271\bT\nT\fT\u0274\tT"
+        + "\u0001T\u0001T\u0004\u00c2\u01fc\u0208\u0214\u0000U\u0002\u0001\u0004"
+        + "\u0002\u0006\u0003\b\u0004\n\u0005\f\u0006\u000e\u0007\u0010\b\u0012\t"
+        + "\u0014\n\u0016\u000b\u0018\f\u001a\r\u001c\u000e\u001e\u000f \u0010\""
+        + "\u0011$\u0012&\u0013(\u0014*\u0015,\u0016.\u00170\u00182\u00194\u001a"
+        + "6\u001b8\u001c:\u001d<\u001e>\u001f@ B!D\"F#H$J%L&N\'P(R)T*V+X,Z-\\.^"
+        + "/`0b1d2f3h4j5l6n7p8r9t:v;x<z=|>~?\u0080@\u0082A\u0084B\u0086C\u0088D\u008a"
+        + "E\u008cF\u008eG\u0090H\u0092I\u0094J\u0096K\u0098L\u009aM\u009cN\u009e"
+        + "O\u00a0P\u00a2Q\u00a4R\u00a6S\u00a8T\u00aaU\u0002\u0000\u0001\u0013\u0003"
+        + "\u0000\t\n\r\r  \u0002\u0000\n\n\r\r\u0001\u000007\u0002\u0000LLll\u0002"
+        + "\u0000XXxx\u0003\u000009AFaf\u0001\u000019\u0001\u000009\u0006\u0000D"
+        + "DFFLLddffll\u0002\u0000EEee\u0002\u0000++--\u0004\u0000DDFFddff\u0002"
+        + "\u0000\"\"\\\\\u0002\u0000\'\'\\\\\u0001\u0000\n\n\u0002\u0000\n\n//\u0007"
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+        + "~\u0000\u0000\u0182q\u0001\u0000\u0000\u0000\u0183\u0184\u0005=\u0000"
+        + "\u0000\u0184\u0185\u0005=\u0000\u0000\u0185\u0186\u0005~\u0000\u0000\u0186"
+        + "s\u0001\u0000\u0000\u0000\u0187\u0188\u0005+\u0000\u0000\u0188\u0189\u0005"
+        + "+\u0000\u0000\u0189u\u0001\u0000\u0000\u0000\u018a\u018b\u0005-\u0000"
+        + "\u0000\u018b\u018c\u0005-\u0000\u0000\u018cw\u0001\u0000\u0000\u0000\u018d"
+        + "\u018e\u0005=\u0000\u0000\u018ey\u0001\u0000\u0000\u0000\u018f\u0190\u0005"
+        + "+\u0000\u0000\u0190\u0191\u0005=\u0000\u0000\u0191{\u0001\u0000\u0000"
+        + "\u0000\u0192\u0193\u0005-\u0000\u0000\u0193\u0194\u0005=\u0000\u0000\u0194"
+        + "}\u0001\u0000\u0000\u0000\u0195\u0196\u0005*\u0000\u0000\u0196\u0197\u0005"
+        + "=\u0000\u0000\u0197\u007f\u0001\u0000\u0000\u0000\u0198\u0199\u0005/\u0000"
+        + "\u0000\u0199\u019a\u0005=\u0000\u0000\u019a\u0081\u0001\u0000\u0000\u0000"
+        + "\u019b\u019c\u0005%\u0000\u0000\u019c\u019d\u0005=\u0000\u0000\u019d\u0083"
+        + "\u0001\u0000\u0000\u0000\u019e\u019f\u0005&\u0000\u0000\u019f\u01a0\u0005"
+        + "=\u0000\u0000\u01a0\u0085\u0001\u0000\u0000\u0000\u01a1\u01a2\u0005^\u0000"
+        + "\u0000\u01a2\u01a3\u0005=\u0000\u0000\u01a3\u0087\u0001\u0000\u0000\u0000"
+        + "\u01a4\u01a5\u0005|\u0000\u0000\u01a5\u01a6\u0005=\u0000\u0000\u01a6\u0089"
+        + "\u0001\u0000\u0000\u0000\u01a7\u01a8\u0005<\u0000\u0000\u01a8\u01a9\u0005"
+        + "<\u0000\u0000\u01a9\u01aa\u0005=\u0000\u0000\u01aa\u008b\u0001\u0000\u0000"
+        + "\u0000\u01ab\u01ac\u0005>\u0000\u0000\u01ac\u01ad\u0005>\u0000\u0000\u01ad"
+        + "\u01ae\u0005=\u0000\u0000\u01ae\u008d\u0001\u0000\u0000\u0000\u01af\u01b0"
+        + "\u0005>\u0000\u0000\u01b0\u01b1\u0005>\u0000\u0000\u01b1\u01b2\u0005>"
+        + "\u0000\u0000\u01b2\u01b3\u0005=\u0000\u0000\u01b3\u008f\u0001\u0000\u0000"
+        + "\u0000\u01b4\u01b6\u00050\u0000\u0000\u01b5\u01b7\u0007\u0002\u0000\u0000"
+        + "\u01b6\u01b5\u0001\u0000\u0000\u0000\u01b7\u01b8\u0001\u0000\u0000\u0000"
+        + "\u01b8\u01b6\u0001\u0000\u0000\u0000\u01b8\u01b9\u0001\u0000\u0000\u0000"
+        + "\u01b9\u01bb\u0001\u0000\u0000\u0000\u01ba\u01bc\u0007\u0003\u0000\u0000"
+        + "\u01bb\u01ba\u0001\u0000\u0000\u0000\u01bb\u01bc\u0001\u0000\u0000\u0000"
+        + "\u01bc\u0091\u0001\u0000\u0000\u0000\u01bd\u01be\u00050\u0000\u0000\u01be"
+        + "\u01c0\u0007\u0004\u0000\u0000\u01bf\u01c1\u0007\u0005\u0000\u0000\u01c0"
+        + "\u01bf\u0001\u0000\u0000\u0000\u01c1\u01c2\u0001\u0000\u0000\u0000\u01c2"
+        + "\u01c0\u0001\u0000\u0000\u0000\u01c2\u01c3\u0001\u0000\u0000\u0000\u01c3"
+        + "\u01c5\u0001\u0000\u0000\u0000\u01c4\u01c6\u0007\u0003\u0000\u0000\u01c5"
+        + "\u01c4\u0001\u0000\u0000\u0000\u01c5\u01c6\u0001\u0000\u0000\u0000\u01c6"
+        + "\u0093\u0001\u0000\u0000\u0000\u01c7\u01d0\u00050\u0000\u0000\u01c8\u01cc"
+        + "\u0007\u0006\u0000\u0000\u01c9\u01cb\u0007\u0007\u0000\u0000\u01ca\u01c9"
+        + "\u0001\u0000\u0000\u0000\u01cb\u01ce\u0001\u0000\u0000\u0000\u01cc\u01ca"
+        + "\u0001\u0000\u0000\u0000\u01cc\u01cd\u0001\u0000\u0000\u0000\u01cd\u01d0"
+        + "\u0001\u0000\u0000\u0000\u01ce\u01cc\u0001\u0000\u0000\u0000\u01cf\u01c7"
+        + "\u0001\u0000\u0000\u0000\u01cf\u01c8\u0001\u0000\u0000\u0000\u01d0\u01d2"
+        + "\u0001\u0000\u0000\u0000\u01d1\u01d3\u0007\b\u0000\u0000\u01d2\u01d1\u0001"
+        + "\u0000\u0000\u0000\u01d2\u01d3\u0001\u0000\u0000\u0000\u01d3\u0095\u0001"
+        + "\u0000\u0000\u0000\u01d4\u01dd\u00050\u0000\u0000\u01d5\u01d9\u0007\u0006"
+        + "\u0000\u0000\u01d6\u01d8\u0007\u0007\u0000\u0000\u01d7\u01d6\u0001\u0000"
+        + "\u0000\u0000\u01d8\u01db\u0001\u0000\u0000\u0000\u01d9\u01d7\u0001\u0000"
+        + "\u0000\u0000\u01d9\u01da\u0001\u0000\u0000\u0000\u01da\u01dd\u0001\u0000"
+        + "\u0000\u0000\u01db\u01d9\u0001\u0000\u0000\u0000\u01dc\u01d4\u0001\u0000"
+        + "\u0000\u0000\u01dc\u01d5\u0001\u0000\u0000\u0000\u01dd\u01e4\u0001\u0000"
+        + "\u0000\u0000\u01de\u01e0\u0003\u0012\b\u0000\u01df\u01e1\u0007\u0007\u0000"
+        + "\u0000\u01e0\u01df\u0001\u0000\u0000\u0000\u01e1\u01e2\u0001\u0000\u0000"
+        + "\u0000\u01e2\u01e0\u0001\u0000\u0000\u0000\u01e2\u01e3\u0001\u0000\u0000"
+        + "\u0000\u01e3\u01e5\u0001\u0000\u0000\u0000\u01e4\u01de\u0001\u0000\u0000"
+        + "\u0000\u01e4\u01e5\u0001\u0000\u0000\u0000\u01e5\u01ef\u0001\u0000\u0000"
+        + "\u0000\u01e6\u01e8\u0007\t\u0000\u0000\u01e7\u01e9\u0007\n\u0000\u0000"
+        + "\u01e8\u01e7\u0001\u0000\u0000\u0000\u01e8\u01e9\u0001\u0000\u0000\u0000"
+        + "\u01e9\u01eb\u0001\u0000\u0000\u0000\u01ea\u01ec\u0007\u0007\u0000\u0000"
+        + "\u01eb\u01ea\u0001\u0000\u0000\u0000\u01ec\u01ed\u0001\u0000\u0000\u0000"
+        + "\u01ed\u01eb\u0001\u0000\u0000\u0000\u01ed\u01ee\u0001\u0000\u0000\u0000"
+        + "\u01ee\u01f0\u0001\u0000\u0000\u0000\u01ef\u01e6\u0001\u0000\u0000\u0000"
+        + "\u01ef\u01f0\u0001\u0000\u0000\u0000\u01f0\u01f2\u0001\u0000\u0000\u0000"
+        + "\u01f1\u01f3\u0007\u000b\u0000\u0000\u01f2\u01f1\u0001\u0000\u0000\u0000"
+        + "\u01f2\u01f3\u0001\u0000\u0000\u0000\u01f3\u0097\u0001\u0000\u0000\u0000"
+        + "\u01f4\u01fc\u0005\"\u0000\u0000\u01f5\u01f6\u0005\\\u0000\u0000\u01f6"
+        + "\u01fb\u0005\"\u0000\u0000\u01f7\u01f8\u0005\\\u0000\u0000\u01f8\u01fb"
+        + "\u0005\\\u0000\u0000\u01f9\u01fb\b\f\u0000\u0000\u01fa\u01f5\u0001\u0000"
+        + "\u0000\u0000\u01fa\u01f7\u0001\u0000\u0000\u0000\u01fa\u01f9\u0001\u0000"
+        + "\u0000\u0000\u01fb\u01fe\u0001\u0000\u0000\u0000\u01fc\u01fd\u0001\u0000"
+        + "\u0000\u0000\u01fc\u01fa\u0001\u0000\u0000\u0000\u01fd\u01ff\u0001\u0000"
+        + "\u0000\u0000\u01fe\u01fc\u0001\u0000\u0000\u0000\u01ff\u020d\u0005\"\u0000"
+        + "\u0000\u0200\u0208\u0005\'\u0000\u0000\u0201\u0202\u0005\\\u0000\u0000"
+        + "\u0202\u0207\u0005\'\u0000\u0000\u0203\u0204\u0005\\\u0000\u0000\u0204"
+        + "\u0207\u0005\\\u0000\u0000\u0205\u0207\b\r\u0000\u0000\u0206\u0201\u0001"
+        + "\u0000\u0000\u0000\u0206\u0203\u0001\u0000\u0000\u0000\u0206\u0205\u0001"
+        + "\u0000\u0000\u0000\u0207\u020a\u0001\u0000\u0000\u0000\u0208\u0209\u0001"
+        + "\u0000\u0000\u0000\u0208\u0206\u0001\u0000\u0000\u0000\u0209\u020b\u0001"
+        + "\u0000\u0000\u0000\u020a\u0208\u0001\u0000\u0000\u0000\u020b\u020d\u0005"
+        + "\'\u0000\u0000\u020c\u01f4\u0001\u0000\u0000\u0000\u020c\u0200\u0001\u0000"
+        + "\u0000\u0000\u020d\u0099\u0001\u0000\u0000\u0000\u020e\u0212\u0005/\u0000"
+        + "\u0000\u020f\u0210\u0005\\\u0000\u0000\u0210\u0213\b\u000e\u0000\u0000"
+        + "\u0211\u0213\b\u000f\u0000\u0000\u0212\u020f\u0001\u0000\u0000\u0000\u0212"
+        + "\u0211\u0001\u0000\u0000\u0000\u0213\u0214\u0001\u0000\u0000\u0000\u0214"
+        + "\u0215\u0001\u0000\u0000\u0000\u0214\u0212\u0001\u0000\u0000\u0000\u0215"
+        + "\u0216\u0001\u0000\u0000\u0000\u0216\u021a\u0005/\u0000\u0000\u0217\u0219"
+        + "\u0007\u0010\u0000\u0000\u0218\u0217\u0001\u0000\u0000\u0000\u0219\u021c"
+        + "\u0001\u0000\u0000\u0000\u021a\u0218\u0001\u0000\u0000\u0000\u021a\u021b"
+        + "\u0001\u0000\u0000\u0000\u021b\u021d\u0001\u0000\u0000\u0000\u021c\u021a"
+        + "\u0001\u0000\u0000\u0000\u021d\u021e\u0004L\u0001\u0000\u021e\u009b\u0001"
+        + "\u0000\u0000\u0000\u021f\u0220\u0005t\u0000\u0000\u0220\u0221\u0005r\u0000"
+        + "\u0000\u0221\u0222\u0005u\u0000\u0000\u0222\u0223\u0005e\u0000\u0000\u0223"
+        + "\u009d\u0001\u0000\u0000\u0000\u0224\u0225\u0005f\u0000\u0000\u0225\u0226"
+        + "\u0005a\u0000\u0000\u0226\u0227\u0005l\u0000\u0000\u0227\u0228\u0005s"
+        + "\u0000\u0000\u0228\u0229\u0005e\u0000\u0000\u0229\u009f\u0001\u0000\u0000"
+        + "\u0000\u022a\u022b\u0005n\u0000\u0000\u022b\u022c\u0005u\u0000\u0000\u022c"
+        + "\u022d\u0005l\u0000\u0000\u022d\u022e\u0005l\u0000\u0000\u022e\u00a1\u0001"
+        + "\u0000\u0000\u0000\u022f\u0230\u0005b\u0000\u0000\u0230\u0231\u0005o\u0000"
+        + "\u0000\u0231\u0232\u0005o\u0000\u0000\u0232\u0233\u0005l\u0000\u0000\u0233"
+        + "\u0234\u0005e\u0000\u0000\u0234\u0235\u0005a\u0000\u0000\u0235\u0256\u0005"
+        + "n\u0000\u0000\u0236\u0237\u0005b\u0000\u0000\u0237\u0238\u0005y\u0000"
+        + "\u0000\u0238\u0239\u0005t\u0000\u0000\u0239\u0256\u0005e\u0000\u0000\u023a"
+        + "\u023b\u0005s\u0000\u0000\u023b\u023c\u0005h\u0000\u0000\u023c\u023d\u0005"
+        + "o\u0000\u0000\u023d\u023e\u0005r\u0000\u0000\u023e\u0256\u0005t\u0000"
+        + "\u0000\u023f\u0240\u0005c\u0000\u0000\u0240\u0241\u0005h\u0000\u0000\u0241"
+        + "\u0242\u0005a\u0000\u0000\u0242\u0256\u0005r\u0000\u0000\u0243\u0244\u0005"
+        + "i\u0000\u0000\u0244\u0245\u0005n\u0000\u0000\u0245\u0256\u0005t\u0000"
+        + "\u0000\u0246\u0247\u0005l\u0000\u0000\u0247\u0248\u0005o\u0000\u0000\u0248"
+        + "\u0249\u0005n\u0000\u0000\u0249\u0256\u0005g\u0000\u0000\u024a\u024b\u0005"
+        + "f\u0000\u0000\u024b\u024c\u0005l\u0000\u0000\u024c\u024d\u0005o\u0000"
+        + "\u0000\u024d\u024e\u0005a\u0000\u0000\u024e\u0256\u0005t\u0000\u0000\u024f"
+        + "\u0250\u0005d\u0000\u0000\u0250\u0251\u0005o\u0000\u0000\u0251\u0252\u0005"
+        + "u\u0000\u0000\u0252\u0253\u0005b\u0000\u0000\u0253\u0254\u0005l\u0000"
+        + "\u0000\u0254\u0256\u0005e\u0000\u0000\u0255\u022f\u0001\u0000\u0000\u0000"
+        + "\u0255\u0236\u0001\u0000\u0000\u0000\u0255\u023a\u0001\u0000\u0000\u0000"
+        + "\u0255\u023f\u0001\u0000\u0000\u0000\u0255\u0243\u0001\u0000\u0000\u0000"
+        + "\u0255\u0246\u0001\u0000\u0000\u0000\u0255\u024a\u0001\u0000\u0000\u0000"
+        + "\u0255\u024f\u0001\u0000\u0000\u0000\u0256\u00a3\u0001\u0000\u0000\u0000"
+        + "\u0257\u0258\u0005d\u0000\u0000\u0258\u0259\u0005e\u0000\u0000\u0259\u025a"
+        + "\u0005f\u0000\u0000\u025a\u00a5\u0001\u0000\u0000\u0000\u025b\u025f\u0007"
+        + "\u0011\u0000\u0000\u025c\u025e\u0007\u0012\u0000\u0000\u025d\u025c\u0001"
+        + "\u0000\u0000\u0000\u025e\u0261\u0001\u0000\u0000\u0000\u025f\u025d\u0001"
+        + "\u0000\u0000\u0000\u025f\u0260\u0001\u0000\u0000\u0000\u0260\u00a7\u0001"
+        + "\u0000\u0000\u0000\u0261\u025f\u0001\u0000\u0000\u0000\u0262\u026b\u0005"
+        + "0\u0000\u0000\u0263\u0267\u0007\u0006\u0000\u0000\u0264\u0266\u0007\u0007"
+        + "\u0000\u0000\u0265\u0264\u0001\u0000\u0000\u0000\u0266\u0269\u0001\u0000"
+        + "\u0000\u0000\u0267\u0265\u0001\u0000\u0000\u0000\u0267\u0268\u0001\u0000"
+        + "\u0000\u0000\u0268\u026b\u0001\u0000\u0000\u0000\u0269\u0267\u0001\u0000"
+        + "\u0000\u0000\u026a\u0262\u0001\u0000\u0000\u0000\u026a\u0263\u0001\u0000"
+        + "\u0000\u0000\u026b\u026c\u0001\u0000\u0000\u0000\u026c\u026d\u0006S\u0002"
+        + "\u0000\u026d\u00a9\u0001\u0000\u0000\u0000\u026e\u0272\u0007\u0011\u0000"
+        + "\u0000\u026f\u0271\u0007\u0012\u0000\u0000\u0270\u026f\u0001\u0000\u0000"
+        + "\u0000\u0271\u0274\u0001\u0000\u0000\u0000\u0272\u0270\u0001\u0000\u0000"
+        + "\u0000\u0272\u0273\u0001\u0000\u0000\u0000\u0273\u0275\u0001\u0000\u0000"
+        + "\u0000\u0274\u0272\u0001\u0000\u0000\u0000\u0275\u0276\u0006T\u0002\u0000"
+        + "\u0276\u00ab\u0001\u0000\u0000\u0000\"\u0000\u0001\u00af\u00b9\u00c2\u00c7"
+        + "\u01b8\u01bb\u01c2\u01c5\u01cc\u01cf\u01d2\u01d9\u01dc\u01e2\u01e4\u01e8"
+        + "\u01ed\u01ef\u01f2\u01fa\u01fc\u0206\u0208\u020c\u0212\u0214\u021a\u0255"
+        + "\u025f\u0267\u026a\u0272\u0003\u0006\u0000\u0000\u0002\u0001\u0000\u0002"
+        + "\u0000\u0000";
     public static final ATN _ATN = new ATNDeserializer().deserialize(_serializedATN.toCharArray());
     static {
         _decisionToDFA = new DFA[_ATN.getNumberOfDecisions()];
diff --git a/modules/lang-painless/src/test/java/org/opensearch/painless/CommentTests.java b/modules/lang-painless/src/test/java/org/opensearch/painless/CommentTests.java
new file mode 100644
index 0000000000000..dbba3226ba300
--- /dev/null
+++ b/modules/lang-painless/src/test/java/org/opensearch/painless/CommentTests.java
@@ -0,0 +1,51 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
+package org.opensearch.painless;
+
+public class CommentTests extends ScriptTestCase {
+
+    public void testSingleLineComments() {
+        assertEquals(5, exec("// comment\n return 5"));
+        assertEquals(5, exec("// comment\r return 5"));
+        assertEquals(5, exec("return 5 // comment no newline or return char"));
+    }
+
+    public void testOpenCloseComments() {
+        assertEquals(5, exec("/* single-line comment */ return 5"));
+        assertEquals(5, exec("/* multi-line \n */ return 5"));
+        assertEquals(5, exec("/* multi-line \r */ return 5"));
+        assertEquals(5, exec("/* multi-line \n\n\r\r */ return 5"));
+        assertEquals(5, exec("def five = 5; /* multi-line \r */ return five"));
+        assertEquals(5, exec("return 5 /* multi-line ignored code */"));
+    }
+}
diff --git a/modules/mapper-extras/src/test/java/org/opensearch/index/mapper/ScaledFloatFieldTypeTests.java b/modules/mapper-extras/src/test/java/org/opensearch/index/mapper/ScaledFloatFieldTypeTests.java
index d83811e6668eb..a653edbd05992 100644
--- a/modules/mapper-extras/src/test/java/org/opensearch/index/mapper/ScaledFloatFieldTypeTests.java
+++ b/modules/mapper-extras/src/test/java/org/opensearch/index/mapper/ScaledFloatFieldTypeTests.java
@@ -135,35 +135,40 @@ public void testRangeQuery() throws IOException {
     public void testRoundsUpperBoundCorrectly() {
         ScaledFloatFieldMapper.ScaledFloatFieldType ft = new ScaledFloatFieldMapper.ScaledFloatFieldType("scaled_float", 100);
         Query scaledFloatQ = ft.rangeQuery(null, 0.1, true, false, MOCK_QSC);
-        assertEquals("scaled_float:[-9223372036854775808 TO 9]", scaledFloatQ.toString());
+        assertEquals("scaled_float:[-9223372036854775808 TO 9]", getQueryString(scaledFloatQ));
         scaledFloatQ = ft.rangeQuery(null, 0.1, true, true, MOCK_QSC);
-        assertEquals("scaled_float:[-9223372036854775808 TO 10]", scaledFloatQ.toString());
+        assertEquals("scaled_float:[-9223372036854775808 TO 10]", getQueryString(scaledFloatQ));
         scaledFloatQ = ft.rangeQuery(null, 0.095, true, false, MOCK_QSC);
-        assertEquals("scaled_float:[-9223372036854775808 TO 9]", scaledFloatQ.toString());
+        assertEquals("scaled_float:[-9223372036854775808 TO 9]", getQueryString(scaledFloatQ));
         scaledFloatQ = ft.rangeQuery(null, 0.095, true, true, MOCK_QSC);
-        assertEquals("scaled_float:[-9223372036854775808 TO 9]", scaledFloatQ.toString());
+        assertEquals("scaled_float:[-9223372036854775808 TO 9]", getQueryString(scaledFloatQ));
         scaledFloatQ = ft.rangeQuery(null, 0.105, true, false, MOCK_QSC);
-        assertEquals("scaled_float:[-9223372036854775808 TO 10]", scaledFloatQ.toString());
+        assertEquals("scaled_float:[-9223372036854775808 TO 10]", getQueryString(scaledFloatQ));
         scaledFloatQ = ft.rangeQuery(null, 0.105, true, true, MOCK_QSC);
-        assertEquals("scaled_float:[-9223372036854775808 TO 10]", scaledFloatQ.toString());
+        assertEquals("scaled_float:[-9223372036854775808 TO 10]", getQueryString(scaledFloatQ));
         scaledFloatQ = ft.rangeQuery(null, 79.99, true, true, MOCK_QSC);
-        assertEquals("scaled_float:[-9223372036854775808 TO 7999]", scaledFloatQ.toString());
+        assertEquals("scaled_float:[-9223372036854775808 TO 7999]", getQueryString(scaledFloatQ));
     }
 
     public void testRoundsLowerBoundCorrectly() {
         ScaledFloatFieldMapper.ScaledFloatFieldType ft = new ScaledFloatFieldMapper.ScaledFloatFieldType("scaled_float", 100);
         Query scaledFloatQ = ft.rangeQuery(-0.1, null, false, true, MOCK_QSC);
-        assertEquals("scaled_float:[-9 TO 9223372036854775807]", scaledFloatQ.toString());
+        assertEquals("scaled_float:[-9 TO 9223372036854775807]", getQueryString(scaledFloatQ));
         scaledFloatQ = ft.rangeQuery(-0.1, null, true, true, MOCK_QSC);
-        assertEquals("scaled_float:[-10 TO 9223372036854775807]", scaledFloatQ.toString());
+        assertEquals("scaled_float:[-10 TO 9223372036854775807]", getQueryString(scaledFloatQ));
         scaledFloatQ = ft.rangeQuery(-0.095, null, false, true, MOCK_QSC);
-        assertEquals("scaled_float:[-9 TO 9223372036854775807]", scaledFloatQ.toString());
+        assertEquals("scaled_float:[-9 TO 9223372036854775807]", getQueryString(scaledFloatQ));
         scaledFloatQ = ft.rangeQuery(-0.095, null, true, true, MOCK_QSC);
-        assertEquals("scaled_float:[-9 TO 9223372036854775807]", scaledFloatQ.toString());
+        assertEquals("scaled_float:[-9 TO 9223372036854775807]", getQueryString(scaledFloatQ));
         scaledFloatQ = ft.rangeQuery(-0.105, null, false, true, MOCK_QSC);
-        assertEquals("scaled_float:[-10 TO 9223372036854775807]", scaledFloatQ.toString());
+        assertEquals("scaled_float:[-10 TO 9223372036854775807]", getQueryString(scaledFloatQ));
         scaledFloatQ = ft.rangeQuery(-0.105, null, true, true, MOCK_QSC);
-        assertEquals("scaled_float:[-10 TO 9223372036854775807]", scaledFloatQ.toString());
+        assertEquals("scaled_float:[-10 TO 9223372036854775807]", getQueryString(scaledFloatQ));
+    }
+
+    private String getQueryString(Query query) {
+        assertTrue(query instanceof IndexOrDocValuesQuery);
+        return ((IndexOrDocValuesQuery) query).getIndexQuery().toString();
     }
 
     public void testValueForSearch() {
diff --git a/modules/transport-netty4/licenses/netty-buffer-4.1.101.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-buffer-4.1.101.Final.jar.sha1
deleted file mode 100644
index 7bb27bbfcb87d..0000000000000
--- a/modules/transport-netty4/licenses/netty-buffer-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-a4d94fd6cdf7a37b15237e32434afd6b955cc591
\ No newline at end of file
diff --git a/modules/transport-netty4/licenses/netty-buffer-4.1.104.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-buffer-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..30f215e47f8ad
--- /dev/null
+++ b/modules/transport-netty4/licenses/netty-buffer-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+756797174b94a3aee11ce83522473f3c18287a43
\ No newline at end of file
diff --git a/modules/transport-netty4/licenses/netty-codec-4.1.101.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-codec-4.1.101.Final.jar.sha1
deleted file mode 100644
index c792b4e834030..0000000000000
--- a/modules/transport-netty4/licenses/netty-codec-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-642523c57c4be15b8b461be7b1532262d193bbb3
\ No newline at end of file
diff --git a/modules/transport-netty4/licenses/netty-codec-4.1.104.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-codec-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..9ed9b896d4b4e
--- /dev/null
+++ b/modules/transport-netty4/licenses/netty-codec-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+f51fcfd3baac88b2c0b8dc715932ad5622d17429
\ No newline at end of file
diff --git a/modules/transport-netty4/licenses/netty-codec-http-4.1.101.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-codec-http-4.1.101.Final.jar.sha1
deleted file mode 100644
index 8bf31f6c3a2c7..0000000000000
--- a/modules/transport-netty4/licenses/netty-codec-http-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-c648f863b301e3fc62d0de098ec61be7628b8ea2
\ No newline at end of file
diff --git a/modules/transport-netty4/licenses/netty-codec-http-4.1.104.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-codec-http-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..478e7cfba1470
--- /dev/null
+++ b/modules/transport-netty4/licenses/netty-codec-http-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+2db1556de1b8dc07695604bf51a0a133263ad63f
\ No newline at end of file
diff --git a/modules/transport-netty4/licenses/netty-codec-http2-4.1.101.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-codec-http2-4.1.101.Final.jar.sha1
deleted file mode 100644
index 48b42bfab9287..0000000000000
--- a/modules/transport-netty4/licenses/netty-codec-http2-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-40590da6c615b852384542051330e9fd51d4c4b1
\ No newline at end of file
diff --git a/modules/transport-netty4/licenses/netty-codec-http2-4.1.104.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-codec-http2-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..f0242709f34f7
--- /dev/null
+++ b/modules/transport-netty4/licenses/netty-codec-http2-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+5bb757929f7c4d1bf12740a378a99643caaad1ac
\ No newline at end of file
diff --git a/modules/transport-netty4/licenses/netty-common-4.1.101.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-common-4.1.101.Final.jar.sha1
deleted file mode 100644
index f4fe86799eaff..0000000000000
--- a/modules/transport-netty4/licenses/netty-common-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-bdb16e4d308b5757123decc886896815d1daf7a3
\ No newline at end of file
diff --git a/modules/transport-netty4/licenses/netty-common-4.1.104.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-common-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..1b533eea3b3b3
--- /dev/null
+++ b/modules/transport-netty4/licenses/netty-common-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+ec5fc4a7c5475eb20805e14f7274aa28872b5ba1
\ No newline at end of file
diff --git a/modules/transport-netty4/licenses/netty-handler-4.1.101.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-handler-4.1.101.Final.jar.sha1
deleted file mode 100644
index cfc0befee237a..0000000000000
--- a/modules/transport-netty4/licenses/netty-handler-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-7800aea949bf95f63df73166d144e49405b279dd
\ No newline at end of file
diff --git a/modules/transport-netty4/licenses/netty-handler-4.1.104.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-handler-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..70777be4dc636
--- /dev/null
+++ b/modules/transport-netty4/licenses/netty-handler-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+18c0e659950cdef5f12c36eccfa14cbd2ad2049d
\ No newline at end of file
diff --git a/modules/transport-netty4/licenses/netty-resolver-4.1.101.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-resolver-4.1.101.Final.jar.sha1
deleted file mode 100644
index f4425d5ac8e5f..0000000000000
--- a/modules/transport-netty4/licenses/netty-resolver-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-5e7eddfa4dfffcbd375d265d1fd08297df94f82f
\ No newline at end of file
diff --git a/modules/transport-netty4/licenses/netty-resolver-4.1.104.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-resolver-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..d7c15af9312fe
--- /dev/null
+++ b/modules/transport-netty4/licenses/netty-resolver-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+dfa4fe5c3a6eabb7af09902eb63266829876d8a2
\ No newline at end of file
diff --git a/modules/transport-netty4/licenses/netty-transport-4.1.101.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-transport-4.1.101.Final.jar.sha1
deleted file mode 100644
index fd9199092452b..0000000000000
--- a/modules/transport-netty4/licenses/netty-transport-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-0b36cc2337b4a4135df7ee2f2d77431c3b541dc5
\ No newline at end of file
diff --git a/modules/transport-netty4/licenses/netty-transport-4.1.104.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-transport-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..5cacaf11a29ce
--- /dev/null
+++ b/modules/transport-netty4/licenses/netty-transport-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+da7b263b6fedc5add70e78ee8927c8bd2b9bb589
\ No newline at end of file
diff --git a/modules/transport-netty4/licenses/netty-transport-native-unix-common-4.1.101.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-transport-native-unix-common-4.1.101.Final.jar.sha1
deleted file mode 100644
index 291c87ad7987b..0000000000000
--- a/modules/transport-netty4/licenses/netty-transport-native-unix-common-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-d0697ef1d71c6111a1b18a387fa985fd6398ace2
\ No newline at end of file
diff --git a/modules/transport-netty4/licenses/netty-transport-native-unix-common-4.1.104.Final.jar.sha1 b/modules/transport-netty4/licenses/netty-transport-native-unix-common-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..64797bf11aedc
--- /dev/null
+++ b/modules/transport-netty4/licenses/netty-transport-native-unix-common-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+d4da9f7237ac3ac292891e0b2d5364acbce128cf
\ No newline at end of file
diff --git a/modules/transport-netty4/src/test/java/org/opensearch/http/netty4/Netty4HttpPipeliningHandlerTests.java b/modules/transport-netty4/src/test/java/org/opensearch/http/netty4/Netty4HttpPipeliningHandlerTests.java
index 743b51e979fb7..99d576bed01c7 100644
--- a/modules/transport-netty4/src/test/java/org/opensearch/http/netty4/Netty4HttpPipeliningHandlerTests.java
+++ b/modules/transport-netty4/src/test/java/org/opensearch/http/netty4/Netty4HttpPipeliningHandlerTests.java
@@ -79,7 +79,7 @@ public class Netty4HttpPipeliningHandlerTests extends OpenSearchTestCase {
     @After
     public void tearDown() throws Exception {
         waitingRequests.keySet().forEach(this::finishRequest);
-        shutdownExecutorService();
+        shutdownExecutorServices();
         super.tearDown();
     }
 
@@ -88,7 +88,7 @@ private CountDownLatch finishRequest(String url) {
         return finishingRequests.get(url);
     }
 
-    private void shutdownExecutorService() throws InterruptedException {
+    private void shutdownExecutorServices() throws InterruptedException {
         if (!handlerService.isShutdown()) {
             handlerService.shutdown();
             handlerService.awaitTermination(10, TimeUnit.SECONDS);
diff --git a/plugins/analysis-icu/licenses/lucene-analysis-icu-9.8.0.jar.sha1 b/plugins/analysis-icu/licenses/lucene-analysis-icu-9.8.0.jar.sha1
deleted file mode 100644
index ef410899981ca..0000000000000
--- a/plugins/analysis-icu/licenses/lucene-analysis-icu-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-7133d34e92770f59eb28686f4d511b9f3f32e970
\ No newline at end of file
diff --git a/plugins/analysis-icu/licenses/lucene-analysis-icu-9.9.1.jar.sha1 b/plugins/analysis-icu/licenses/lucene-analysis-icu-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..dde9b7c100dc7
--- /dev/null
+++ b/plugins/analysis-icu/licenses/lucene-analysis-icu-9.9.1.jar.sha1
@@ -0,0 +1 @@
+147cb42a90a29501d9ca6094ea0db1d213f3076a
\ No newline at end of file
diff --git a/plugins/analysis-kuromoji/licenses/lucene-analysis-kuromoji-9.8.0.jar.sha1 b/plugins/analysis-kuromoji/licenses/lucene-analysis-kuromoji-9.8.0.jar.sha1
deleted file mode 100644
index 46b83c9e40b3a..0000000000000
--- a/plugins/analysis-kuromoji/licenses/lucene-analysis-kuromoji-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-be44282e1f6b91a0650fcceb558053d6bdd4863d
\ No newline at end of file
diff --git a/plugins/analysis-kuromoji/licenses/lucene-analysis-kuromoji-9.9.1.jar.sha1 b/plugins/analysis-kuromoji/licenses/lucene-analysis-kuromoji-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..b70a22e9db096
--- /dev/null
+++ b/plugins/analysis-kuromoji/licenses/lucene-analysis-kuromoji-9.9.1.jar.sha1
@@ -0,0 +1 @@
+b034dd3a975763e083c7e11b5d0f7d516ab72590
\ No newline at end of file
diff --git a/plugins/analysis-kuromoji/src/main/java/org/opensearch/index/analysis/KuromojiTokenizerFactory.java b/plugins/analysis-kuromoji/src/main/java/org/opensearch/index/analysis/KuromojiTokenizerFactory.java
index 2939711f6f7e1..76b109932e642 100644
--- a/plugins/analysis-kuromoji/src/main/java/org/opensearch/index/analysis/KuromojiTokenizerFactory.java
+++ b/plugins/analysis-kuromoji/src/main/java/org/opensearch/index/analysis/KuromojiTokenizerFactory.java
@@ -38,7 +38,7 @@
 import org.apache.lucene.analysis.ja.JapaneseTokenizer;
 import org.apache.lucene.analysis.ja.JapaneseTokenizer.Mode;
 import org.apache.lucene.analysis.ja.dict.UserDictionary;
-import org.apache.lucene.analysis.ja.util.CSVUtil;
+import org.apache.lucene.analysis.util.CSVUtil;
 import org.opensearch.OpenSearchException;
 import org.opensearch.common.settings.Settings;
 import org.opensearch.env.Environment;
diff --git a/plugins/analysis-nori/licenses/lucene-analysis-nori-9.8.0.jar.sha1 b/plugins/analysis-nori/licenses/lucene-analysis-nori-9.8.0.jar.sha1
deleted file mode 100644
index 36664695a7818..0000000000000
--- a/plugins/analysis-nori/licenses/lucene-analysis-nori-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-bd1f80d33346f7e588685484ef29a304db5190e4
\ No newline at end of file
diff --git a/plugins/analysis-nori/licenses/lucene-analysis-nori-9.9.1.jar.sha1 b/plugins/analysis-nori/licenses/lucene-analysis-nori-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..323f165c62790
--- /dev/null
+++ b/plugins/analysis-nori/licenses/lucene-analysis-nori-9.9.1.jar.sha1
@@ -0,0 +1 @@
+c405f2f7d0fc127d88dfbadd753469b2028fdf52
\ No newline at end of file
diff --git a/plugins/analysis-phonetic/licenses/lucene-analysis-phonetic-9.8.0.jar.sha1 b/plugins/analysis-phonetic/licenses/lucene-analysis-phonetic-9.8.0.jar.sha1
deleted file mode 100644
index 003ccdf8b0727..0000000000000
--- a/plugins/analysis-phonetic/licenses/lucene-analysis-phonetic-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-b9ffdc7a52d2087ecb03318ec06305b480cdfe82
\ No newline at end of file
diff --git a/plugins/analysis-phonetic/licenses/lucene-analysis-phonetic-9.9.1.jar.sha1 b/plugins/analysis-phonetic/licenses/lucene-analysis-phonetic-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..dd659ddf4de95
--- /dev/null
+++ b/plugins/analysis-phonetic/licenses/lucene-analysis-phonetic-9.9.1.jar.sha1
@@ -0,0 +1 @@
+970e5775876c2d7e1b9af7421a4b17d96f63faf4
\ No newline at end of file
diff --git a/plugins/analysis-smartcn/licenses/lucene-analysis-smartcn-9.8.0.jar.sha1 b/plugins/analysis-smartcn/licenses/lucene-analysis-smartcn-9.8.0.jar.sha1
deleted file mode 100644
index e22eaa474016f..0000000000000
--- a/plugins/analysis-smartcn/licenses/lucene-analysis-smartcn-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-f73e2007b133fb699e517ef13b4952844f0150d8
\ No newline at end of file
diff --git a/plugins/analysis-smartcn/licenses/lucene-analysis-smartcn-9.9.1.jar.sha1 b/plugins/analysis-smartcn/licenses/lucene-analysis-smartcn-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..ed0e81d8f1f75
--- /dev/null
+++ b/plugins/analysis-smartcn/licenses/lucene-analysis-smartcn-9.9.1.jar.sha1
@@ -0,0 +1 @@
+2421e5238e9b8484929291744d709dd743c01da1
\ No newline at end of file
diff --git a/plugins/analysis-stempel/licenses/lucene-analysis-stempel-9.8.0.jar.sha1 b/plugins/analysis-stempel/licenses/lucene-analysis-stempel-9.8.0.jar.sha1
deleted file mode 100644
index 1ebe42a2a2f56..0000000000000
--- a/plugins/analysis-stempel/licenses/lucene-analysis-stempel-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-2c09cbc021a8f81a01600a1d2a999361e70f7aed
\ No newline at end of file
diff --git a/plugins/analysis-stempel/licenses/lucene-analysis-stempel-9.9.1.jar.sha1 b/plugins/analysis-stempel/licenses/lucene-analysis-stempel-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..fd8e000088180
--- /dev/null
+++ b/plugins/analysis-stempel/licenses/lucene-analysis-stempel-9.9.1.jar.sha1
@@ -0,0 +1 @@
+a23e7de4cd9ae7af285c89dc1c55e0ac3f157fd3
\ No newline at end of file
diff --git a/plugins/analysis-ukrainian/licenses/lucene-analysis-morfologik-9.8.0.jar.sha1 b/plugins/analysis-ukrainian/licenses/lucene-analysis-morfologik-9.8.0.jar.sha1
deleted file mode 100644
index 3c4523d45c0f5..0000000000000
--- a/plugins/analysis-ukrainian/licenses/lucene-analysis-morfologik-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-b054f2c7b11fc7c5601b4c3cdf18aa7508612898
\ No newline at end of file
diff --git a/plugins/analysis-ukrainian/licenses/lucene-analysis-morfologik-9.9.1.jar.sha1 b/plugins/analysis-ukrainian/licenses/lucene-analysis-morfologik-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..d0e7a3b0c751c
--- /dev/null
+++ b/plugins/analysis-ukrainian/licenses/lucene-analysis-morfologik-9.9.1.jar.sha1
@@ -0,0 +1 @@
+8d9bce1ea51db279878c51091dd9aefc7b335da4
\ No newline at end of file
diff --git a/plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/CorrelationCodecVersion.java b/plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/CorrelationCodecVersion.java
index 5e2cb8bfbc03a..3fcc995fb4199 100644
--- a/plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/CorrelationCodecVersion.java
+++ b/plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/CorrelationCodecVersion.java
@@ -9,10 +9,10 @@
 package org.opensearch.plugin.correlation.core.index.codec;
 
 import org.apache.lucene.codecs.Codec;
-import org.apache.lucene.codecs.lucene95.Lucene95Codec;
+import org.apache.lucene.codecs.lucene99.Lucene99Codec;
 import org.opensearch.index.mapper.MapperService;
-import org.opensearch.plugin.correlation.core.index.codec.correlation950.CorrelationCodec;
-import org.opensearch.plugin.correlation.core.index.codec.correlation950.PerFieldCorrelationVectorsFormat;
+import org.opensearch.plugin.correlation.core.index.codec.correlation990.CorrelationCodec;
+import org.opensearch.plugin.correlation.core.index.codec.correlation990.PerFieldCorrelationVectorsFormat;
 
 import java.util.Optional;
 import java.util.function.BiFunction;
@@ -24,15 +24,15 @@
  * @opensearch.internal
  */
 public enum CorrelationCodecVersion {
-    V_9_5_0(
+    V_9_9_0(
         "CorrelationCodec",
-        new Lucene95Codec(),
+        new Lucene99Codec(),
         new PerFieldCorrelationVectorsFormat(Optional.empty()),
         (userCodec, mapperService) -> new CorrelationCodec(userCodec, new PerFieldCorrelationVectorsFormat(Optional.of(mapperService))),
         CorrelationCodec::new
     );
 
-    private static final CorrelationCodecVersion CURRENT = V_9_5_0;
+    private static final CorrelationCodecVersion CURRENT = V_9_9_0;
     private final String codecName;
     private final Codec defaultCodecDelegate;
     private final PerFieldCorrelationVectorsFormat perFieldCorrelationVectorsFormat;
diff --git a/plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation950/CorrelationCodec.java b/plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation990/CorrelationCodec.java
similarity index 97%
rename from plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation950/CorrelationCodec.java
rename to plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation990/CorrelationCodec.java
index f91ba429fbea9..022972e2e06c3 100644
--- a/plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation950/CorrelationCodec.java
+++ b/plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation990/CorrelationCodec.java
@@ -6,7 +6,7 @@
  * compatible open source license.
  */
 
-package org.opensearch.plugin.correlation.core.index.codec.correlation950;
+package org.opensearch.plugin.correlation.core.index.codec.correlation990;
 
 import org.apache.lucene.codecs.Codec;
 import org.apache.lucene.codecs.FilterCodec;
@@ -19,7 +19,7 @@
  * @opensearch.internal
  */
 public class CorrelationCodec extends FilterCodec {
-    private static final CorrelationCodecVersion VERSION = CorrelationCodecVersion.V_9_5_0;
+    private static final CorrelationCodecVersion VERSION = CorrelationCodecVersion.V_9_9_0;
     private final PerFieldCorrelationVectorsFormat perFieldCorrelationVectorsFormat;
 
     /**
diff --git a/plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation950/PerFieldCorrelationVectorsFormat.java b/plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation990/PerFieldCorrelationVectorsFormat.java
similarity index 77%
rename from plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation950/PerFieldCorrelationVectorsFormat.java
rename to plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation990/PerFieldCorrelationVectorsFormat.java
index f6862ecc17736..89cc0b614a1a5 100644
--- a/plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation950/PerFieldCorrelationVectorsFormat.java
+++ b/plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation990/PerFieldCorrelationVectorsFormat.java
@@ -6,9 +6,9 @@
  * compatible open source license.
  */
 
-package org.opensearch.plugin.correlation.core.index.codec.correlation950;
+package org.opensearch.plugin.correlation.core.index.codec.correlation990;
 
-import org.apache.lucene.codecs.lucene95.Lucene95HnswVectorsFormat;
+import org.apache.lucene.codecs.lucene99.Lucene99HnswVectorsFormat;
 import org.opensearch.index.mapper.MapperService;
 import org.opensearch.plugin.correlation.core.index.codec.BasePerFieldCorrelationVectorsFormat;
 
@@ -26,10 +26,10 @@ public class PerFieldCorrelationVectorsFormat extends BasePerFieldCorrelationVec
     public PerFieldCorrelationVectorsFormat(final Optional<MapperService> mapperService) {
         super(
             mapperService,
-            Lucene95HnswVectorsFormat.DEFAULT_MAX_CONN,
-            Lucene95HnswVectorsFormat.DEFAULT_BEAM_WIDTH,
-            Lucene95HnswVectorsFormat::new,
-            Lucene95HnswVectorsFormat::new
+            Lucene99HnswVectorsFormat.DEFAULT_MAX_CONN,
+            Lucene99HnswVectorsFormat.DEFAULT_BEAM_WIDTH,
+            Lucene99HnswVectorsFormat::new,
+            Lucene99HnswVectorsFormat::new
         );
     }
 }
diff --git a/plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation950/package-info.java b/plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation990/package-info.java
similarity index 96%
rename from plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation950/package-info.java
rename to plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation990/package-info.java
index b4dad34d2718e..fc2a9de58a73a 100644
--- a/plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation950/package-info.java
+++ b/plugins/events-correlation-engine/src/main/java/org/opensearch/plugin/correlation/core/index/codec/correlation990/package-info.java
@@ -9,4 +9,4 @@
 /**
  * custom Lucene9.5 codec package for events-correlation-engine
  */
-package org.opensearch.plugin.correlation.core.index.codec.correlation950;
+package org.opensearch.plugin.correlation.core.index.codec.correlation990;
diff --git a/plugins/events-correlation-engine/src/main/resources/META-INF/services/org.apache.lucene.codecs.Codec b/plugins/events-correlation-engine/src/main/resources/META-INF/services/org.apache.lucene.codecs.Codec
index 598a3b6af73c2..013c17e4a9736 100644
--- a/plugins/events-correlation-engine/src/main/resources/META-INF/services/org.apache.lucene.codecs.Codec
+++ b/plugins/events-correlation-engine/src/main/resources/META-INF/services/org.apache.lucene.codecs.Codec
@@ -1 +1 @@
-org.opensearch.plugin.correlation.core.index.codec.correlation950.CorrelationCodec
+org.opensearch.plugin.correlation.core.index.codec.correlation990.CorrelationCodec
diff --git a/plugins/events-correlation-engine/src/test/java/org/opensearch/plugin/correlation/core/index/codec/correlation950/CorrelationCodecTests.java b/plugins/events-correlation-engine/src/test/java/org/opensearch/plugin/correlation/core/index/codec/correlation990/CorrelationCodecTests.java
similarity index 98%
rename from plugins/events-correlation-engine/src/test/java/org/opensearch/plugin/correlation/core/index/codec/correlation950/CorrelationCodecTests.java
rename to plugins/events-correlation-engine/src/test/java/org/opensearch/plugin/correlation/core/index/codec/correlation990/CorrelationCodecTests.java
index b93172537d419..7223b450a136c 100644
--- a/plugins/events-correlation-engine/src/test/java/org/opensearch/plugin/correlation/core/index/codec/correlation950/CorrelationCodecTests.java
+++ b/plugins/events-correlation-engine/src/test/java/org/opensearch/plugin/correlation/core/index/codec/correlation990/CorrelationCodecTests.java
@@ -6,7 +6,7 @@
  * compatible open source license.
  */
 
-package org.opensearch.plugin.correlation.core.index.codec.correlation950;
+package org.opensearch.plugin.correlation.core.index.codec.correlation990;
 
 import org.apache.lucene.codecs.Codec;
 import org.apache.lucene.document.Document;
@@ -32,7 +32,7 @@
 
 import static org.opensearch.plugin.correlation.core.index.codec.BasePerFieldCorrelationVectorsFormat.METHOD_PARAMETER_EF_CONSTRUCTION;
 import static org.opensearch.plugin.correlation.core.index.codec.BasePerFieldCorrelationVectorsFormat.METHOD_PARAMETER_M;
-import static org.opensearch.plugin.correlation.core.index.codec.CorrelationCodecVersion.V_9_5_0;
+import static org.opensearch.plugin.correlation.core.index.codec.CorrelationCodecVersion.V_9_9_0;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.spy;
@@ -56,7 +56,7 @@ public void testCorrelationVectorIndex() throws Exception {
         Function<MapperService, PerFieldCorrelationVectorsFormat> perFieldCorrelationVectorsProvider =
             mapperService -> new PerFieldCorrelationVectorsFormat(Optional.of(mapperService));
         Function<PerFieldCorrelationVectorsFormat, Codec> correlationCodecProvider = (correlationVectorsFormat -> new CorrelationCodec(
-            V_9_5_0.getDefaultCodecDelegate(),
+            V_9_9_0.getDefaultCodecDelegate(),
             correlationVectorsFormat
         ));
         testCorrelationVectorIndex(correlationCodecProvider, perFieldCorrelationVectorsProvider);
diff --git a/plugins/repository-azure/licenses/netty-codec-dns-4.1.101.Final.jar.sha1 b/plugins/repository-azure/licenses/netty-codec-dns-4.1.101.Final.jar.sha1
deleted file mode 100644
index 0789dea62778a..0000000000000
--- a/plugins/repository-azure/licenses/netty-codec-dns-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-24d0f4f2b0b0b55acc498d62f9c0921d0ea6da7b
\ No newline at end of file
diff --git a/plugins/repository-azure/licenses/netty-codec-dns-4.1.104.Final.jar.sha1 b/plugins/repository-azure/licenses/netty-codec-dns-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..0232fc58f9357
--- /dev/null
+++ b/plugins/repository-azure/licenses/netty-codec-dns-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+8e237ce67ab230ed1ba749d6651b278333c21b3f
\ No newline at end of file
diff --git a/plugins/repository-azure/licenses/netty-codec-http2-4.1.101.Final.jar.sha1 b/plugins/repository-azure/licenses/netty-codec-http2-4.1.101.Final.jar.sha1
deleted file mode 100644
index 48b42bfab9287..0000000000000
--- a/plugins/repository-azure/licenses/netty-codec-http2-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-40590da6c615b852384542051330e9fd51d4c4b1
\ No newline at end of file
diff --git a/plugins/repository-azure/licenses/netty-codec-http2-4.1.104.Final.jar.sha1 b/plugins/repository-azure/licenses/netty-codec-http2-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..f0242709f34f7
--- /dev/null
+++ b/plugins/repository-azure/licenses/netty-codec-http2-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+5bb757929f7c4d1bf12740a378a99643caaad1ac
\ No newline at end of file
diff --git a/plugins/repository-azure/licenses/netty-codec-socks-4.1.101.Final.jar.sha1 b/plugins/repository-azure/licenses/netty-codec-socks-4.1.101.Final.jar.sha1
deleted file mode 100644
index fb2d1aa25a5ec..0000000000000
--- a/plugins/repository-azure/licenses/netty-codec-socks-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-cbaac9e2c2d7b86e4c1bda220cde49949c9bcaee
\ No newline at end of file
diff --git a/plugins/repository-azure/licenses/netty-codec-socks-4.1.104.Final.jar.sha1 b/plugins/repository-azure/licenses/netty-codec-socks-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..3b6cd3524d978
--- /dev/null
+++ b/plugins/repository-azure/licenses/netty-codec-socks-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+5b126ceba61275f38297cacd5ea0cd6d3addee04
\ No newline at end of file
diff --git a/plugins/repository-azure/licenses/netty-handler-proxy-4.1.101.Final.jar.sha1 b/plugins/repository-azure/licenses/netty-handler-proxy-4.1.101.Final.jar.sha1
deleted file mode 100644
index ca030677c32d0..0000000000000
--- a/plugins/repository-azure/licenses/netty-handler-proxy-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-c198ee61abba7ae6b3cb6b1033f04fb0ae79d512
\ No newline at end of file
diff --git a/plugins/repository-azure/licenses/netty-handler-proxy-4.1.104.Final.jar.sha1 b/plugins/repository-azure/licenses/netty-handler-proxy-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..9d01e814971f2
--- /dev/null
+++ b/plugins/repository-azure/licenses/netty-handler-proxy-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+50a2d899a8f8a68daed1a9b6d7750184310cc45f
\ No newline at end of file
diff --git a/plugins/repository-azure/licenses/netty-resolver-dns-4.1.101.Final.jar.sha1 b/plugins/repository-azure/licenses/netty-resolver-dns-4.1.101.Final.jar.sha1
deleted file mode 100644
index 450c34d975bb9..0000000000000
--- a/plugins/repository-azure/licenses/netty-resolver-dns-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-d3f503d7554cf25edc6b83b9b4724b240c6e91d5
\ No newline at end of file
diff --git a/plugins/repository-azure/licenses/netty-resolver-dns-4.1.104.Final.jar.sha1 b/plugins/repository-azure/licenses/netty-resolver-dns-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..987b524aedc98
--- /dev/null
+++ b/plugins/repository-azure/licenses/netty-resolver-dns-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+f1210e5856fecb9182d58c0d33fa6e946b344b40
\ No newline at end of file
diff --git a/plugins/repository-azure/licenses/netty-transport-native-unix-common-4.1.101.Final.jar.sha1 b/plugins/repository-azure/licenses/netty-transport-native-unix-common-4.1.101.Final.jar.sha1
deleted file mode 100644
index 291c87ad7987b..0000000000000
--- a/plugins/repository-azure/licenses/netty-transport-native-unix-common-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-d0697ef1d71c6111a1b18a387fa985fd6398ace2
\ No newline at end of file
diff --git a/plugins/repository-azure/licenses/netty-transport-native-unix-common-4.1.104.Final.jar.sha1 b/plugins/repository-azure/licenses/netty-transport-native-unix-common-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..64797bf11aedc
--- /dev/null
+++ b/plugins/repository-azure/licenses/netty-transport-native-unix-common-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+d4da9f7237ac3ac292891e0b2d5364acbce128cf
\ No newline at end of file
diff --git a/plugins/repository-hdfs/build.gradle b/plugins/repository-hdfs/build.gradle
index f04d42a2155d6..36843e3bc8700 100644
--- a/plugins/repository-hdfs/build.gradle
+++ b/plugins/repository-hdfs/build.gradle
@@ -75,7 +75,7 @@ dependencies {
   api 'commons-collections:commons-collections:3.2.2'
   api "org.apache.commons:commons-compress:${versions.commonscompress}"
   api 'org.apache.commons:commons-configuration2:2.9.0'
-  api 'commons-io:commons-io:2.14.0'
+  api 'commons-io:commons-io:2.15.1'
   api 'org.apache.commons:commons-lang3:3.14.0'
   implementation 'com.google.re2j:re2j:1.7'
   api 'javax.servlet:servlet-api:2.5'
diff --git a/plugins/repository-hdfs/licenses/commons-io-2.14.0.jar.sha1 b/plugins/repository-hdfs/licenses/commons-io-2.14.0.jar.sha1
deleted file mode 100644
index 33c5cfe53e01d..0000000000000
--- a/plugins/repository-hdfs/licenses/commons-io-2.14.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-a4c6e1f6c196339473cd2e1b037f0eb97c62755b
\ No newline at end of file
diff --git a/plugins/repository-hdfs/licenses/commons-io-2.15.1.jar.sha1 b/plugins/repository-hdfs/licenses/commons-io-2.15.1.jar.sha1
new file mode 100644
index 0000000000000..47c5d13812a36
--- /dev/null
+++ b/plugins/repository-hdfs/licenses/commons-io-2.15.1.jar.sha1
@@ -0,0 +1 @@
+f11560da189ab563a5c8e351941415430e9304ea
\ No newline at end of file
diff --git a/plugins/repository-hdfs/licenses/netty-all-4.1.101.Final.jar.sha1 b/plugins/repository-hdfs/licenses/netty-all-4.1.101.Final.jar.sha1
deleted file mode 100644
index 093ced04bee4b..0000000000000
--- a/plugins/repository-hdfs/licenses/netty-all-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-2761d380bc97e6ce64745dd9ca04538cedd40a5b
\ No newline at end of file
diff --git a/plugins/repository-hdfs/licenses/netty-all-4.1.104.Final.jar.sha1 b/plugins/repository-hdfs/licenses/netty-all-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..9110503f67304
--- /dev/null
+++ b/plugins/repository-hdfs/licenses/netty-all-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+d75246285e5fac6f6dad47e387ed4f46f36e521d
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-buffer-4.1.101.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-buffer-4.1.101.Final.jar.sha1
deleted file mode 100644
index 7bb27bbfcb87d..0000000000000
--- a/plugins/repository-s3/licenses/netty-buffer-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-a4d94fd6cdf7a37b15237e32434afd6b955cc591
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-buffer-4.1.104.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-buffer-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..30f215e47f8ad
--- /dev/null
+++ b/plugins/repository-s3/licenses/netty-buffer-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+756797174b94a3aee11ce83522473f3c18287a43
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-codec-4.1.101.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-codec-4.1.101.Final.jar.sha1
deleted file mode 100644
index c792b4e834030..0000000000000
--- a/plugins/repository-s3/licenses/netty-codec-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-642523c57c4be15b8b461be7b1532262d193bbb3
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-codec-4.1.104.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-codec-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..9ed9b896d4b4e
--- /dev/null
+++ b/plugins/repository-s3/licenses/netty-codec-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+f51fcfd3baac88b2c0b8dc715932ad5622d17429
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-codec-http-4.1.101.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-codec-http-4.1.101.Final.jar.sha1
deleted file mode 100644
index 8bf31f6c3a2c7..0000000000000
--- a/plugins/repository-s3/licenses/netty-codec-http-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-c648f863b301e3fc62d0de098ec61be7628b8ea2
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-codec-http-4.1.104.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-codec-http-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..478e7cfba1470
--- /dev/null
+++ b/plugins/repository-s3/licenses/netty-codec-http-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+2db1556de1b8dc07695604bf51a0a133263ad63f
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-codec-http2-4.1.101.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-codec-http2-4.1.101.Final.jar.sha1
deleted file mode 100644
index 48b42bfab9287..0000000000000
--- a/plugins/repository-s3/licenses/netty-codec-http2-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-40590da6c615b852384542051330e9fd51d4c4b1
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-codec-http2-4.1.104.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-codec-http2-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..f0242709f34f7
--- /dev/null
+++ b/plugins/repository-s3/licenses/netty-codec-http2-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+5bb757929f7c4d1bf12740a378a99643caaad1ac
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-common-4.1.101.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-common-4.1.101.Final.jar.sha1
deleted file mode 100644
index f4fe86799eaff..0000000000000
--- a/plugins/repository-s3/licenses/netty-common-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-bdb16e4d308b5757123decc886896815d1daf7a3
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-common-4.1.104.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-common-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..1b533eea3b3b3
--- /dev/null
+++ b/plugins/repository-s3/licenses/netty-common-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+ec5fc4a7c5475eb20805e14f7274aa28872b5ba1
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-handler-4.1.101.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-handler-4.1.101.Final.jar.sha1
deleted file mode 100644
index cfc0befee237a..0000000000000
--- a/plugins/repository-s3/licenses/netty-handler-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-7800aea949bf95f63df73166d144e49405b279dd
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-handler-4.1.104.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-handler-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..70777be4dc636
--- /dev/null
+++ b/plugins/repository-s3/licenses/netty-handler-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+18c0e659950cdef5f12c36eccfa14cbd2ad2049d
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-resolver-4.1.101.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-resolver-4.1.101.Final.jar.sha1
deleted file mode 100644
index f4425d5ac8e5f..0000000000000
--- a/plugins/repository-s3/licenses/netty-resolver-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-5e7eddfa4dfffcbd375d265d1fd08297df94f82f
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-resolver-4.1.104.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-resolver-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..d7c15af9312fe
--- /dev/null
+++ b/plugins/repository-s3/licenses/netty-resolver-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+dfa4fe5c3a6eabb7af09902eb63266829876d8a2
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-transport-4.1.101.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-transport-4.1.101.Final.jar.sha1
deleted file mode 100644
index fd9199092452b..0000000000000
--- a/plugins/repository-s3/licenses/netty-transport-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-0b36cc2337b4a4135df7ee2f2d77431c3b541dc5
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-transport-4.1.104.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-transport-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..5cacaf11a29ce
--- /dev/null
+++ b/plugins/repository-s3/licenses/netty-transport-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+da7b263b6fedc5add70e78ee8927c8bd2b9bb589
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-transport-classes-epoll-4.1.101.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-transport-classes-epoll-4.1.101.Final.jar.sha1
deleted file mode 100644
index a710d964c1803..0000000000000
--- a/plugins/repository-s3/licenses/netty-transport-classes-epoll-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-f86303830ab65680e45cabb531e37078ecc6791e
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-transport-classes-epoll-4.1.104.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-transport-classes-epoll-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..522d85a3bf12e
--- /dev/null
+++ b/plugins/repository-s3/licenses/netty-transport-classes-epoll-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+700fdbabab44709b0eccffe8f91c4226a5787356
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-transport-native-unix-common-4.1.101.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-transport-native-unix-common-4.1.101.Final.jar.sha1
deleted file mode 100644
index 291c87ad7987b..0000000000000
--- a/plugins/repository-s3/licenses/netty-transport-native-unix-common-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-d0697ef1d71c6111a1b18a387fa985fd6398ace2
\ No newline at end of file
diff --git a/plugins/repository-s3/licenses/netty-transport-native-unix-common-4.1.104.Final.jar.sha1 b/plugins/repository-s3/licenses/netty-transport-native-unix-common-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..64797bf11aedc
--- /dev/null
+++ b/plugins/repository-s3/licenses/netty-transport-native-unix-common-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+d4da9f7237ac3ac292891e0b2d5364acbce128cf
\ No newline at end of file
diff --git a/plugins/transport-nio/licenses/netty-buffer-4.1.101.Final.jar.sha1 b/plugins/transport-nio/licenses/netty-buffer-4.1.101.Final.jar.sha1
deleted file mode 100644
index 7bb27bbfcb87d..0000000000000
--- a/plugins/transport-nio/licenses/netty-buffer-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-a4d94fd6cdf7a37b15237e32434afd6b955cc591
\ No newline at end of file
diff --git a/plugins/transport-nio/licenses/netty-buffer-4.1.104.Final.jar.sha1 b/plugins/transport-nio/licenses/netty-buffer-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..30f215e47f8ad
--- /dev/null
+++ b/plugins/transport-nio/licenses/netty-buffer-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+756797174b94a3aee11ce83522473f3c18287a43
\ No newline at end of file
diff --git a/plugins/transport-nio/licenses/netty-codec-4.1.101.Final.jar.sha1 b/plugins/transport-nio/licenses/netty-codec-4.1.101.Final.jar.sha1
deleted file mode 100644
index c792b4e834030..0000000000000
--- a/plugins/transport-nio/licenses/netty-codec-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-642523c57c4be15b8b461be7b1532262d193bbb3
\ No newline at end of file
diff --git a/plugins/transport-nio/licenses/netty-codec-4.1.104.Final.jar.sha1 b/plugins/transport-nio/licenses/netty-codec-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..9ed9b896d4b4e
--- /dev/null
+++ b/plugins/transport-nio/licenses/netty-codec-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+f51fcfd3baac88b2c0b8dc715932ad5622d17429
\ No newline at end of file
diff --git a/plugins/transport-nio/licenses/netty-codec-http-4.1.101.Final.jar.sha1 b/plugins/transport-nio/licenses/netty-codec-http-4.1.101.Final.jar.sha1
deleted file mode 100644
index 8bf31f6c3a2c7..0000000000000
--- a/plugins/transport-nio/licenses/netty-codec-http-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-c648f863b301e3fc62d0de098ec61be7628b8ea2
\ No newline at end of file
diff --git a/plugins/transport-nio/licenses/netty-codec-http-4.1.104.Final.jar.sha1 b/plugins/transport-nio/licenses/netty-codec-http-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..478e7cfba1470
--- /dev/null
+++ b/plugins/transport-nio/licenses/netty-codec-http-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+2db1556de1b8dc07695604bf51a0a133263ad63f
\ No newline at end of file
diff --git a/plugins/transport-nio/licenses/netty-common-4.1.101.Final.jar.sha1 b/plugins/transport-nio/licenses/netty-common-4.1.101.Final.jar.sha1
deleted file mode 100644
index f4fe86799eaff..0000000000000
--- a/plugins/transport-nio/licenses/netty-common-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-bdb16e4d308b5757123decc886896815d1daf7a3
\ No newline at end of file
diff --git a/plugins/transport-nio/licenses/netty-common-4.1.104.Final.jar.sha1 b/plugins/transport-nio/licenses/netty-common-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..1b533eea3b3b3
--- /dev/null
+++ b/plugins/transport-nio/licenses/netty-common-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+ec5fc4a7c5475eb20805e14f7274aa28872b5ba1
\ No newline at end of file
diff --git a/plugins/transport-nio/licenses/netty-handler-4.1.101.Final.jar.sha1 b/plugins/transport-nio/licenses/netty-handler-4.1.101.Final.jar.sha1
deleted file mode 100644
index cfc0befee237a..0000000000000
--- a/plugins/transport-nio/licenses/netty-handler-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-7800aea949bf95f63df73166d144e49405b279dd
\ No newline at end of file
diff --git a/plugins/transport-nio/licenses/netty-handler-4.1.104.Final.jar.sha1 b/plugins/transport-nio/licenses/netty-handler-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..70777be4dc636
--- /dev/null
+++ b/plugins/transport-nio/licenses/netty-handler-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+18c0e659950cdef5f12c36eccfa14cbd2ad2049d
\ No newline at end of file
diff --git a/plugins/transport-nio/licenses/netty-resolver-4.1.101.Final.jar.sha1 b/plugins/transport-nio/licenses/netty-resolver-4.1.101.Final.jar.sha1
deleted file mode 100644
index f4425d5ac8e5f..0000000000000
--- a/plugins/transport-nio/licenses/netty-resolver-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-5e7eddfa4dfffcbd375d265d1fd08297df94f82f
\ No newline at end of file
diff --git a/plugins/transport-nio/licenses/netty-resolver-4.1.104.Final.jar.sha1 b/plugins/transport-nio/licenses/netty-resolver-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..d7c15af9312fe
--- /dev/null
+++ b/plugins/transport-nio/licenses/netty-resolver-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+dfa4fe5c3a6eabb7af09902eb63266829876d8a2
\ No newline at end of file
diff --git a/plugins/transport-nio/licenses/netty-transport-4.1.101.Final.jar.sha1 b/plugins/transport-nio/licenses/netty-transport-4.1.101.Final.jar.sha1
deleted file mode 100644
index fd9199092452b..0000000000000
--- a/plugins/transport-nio/licenses/netty-transport-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-0b36cc2337b4a4135df7ee2f2d77431c3b541dc5
\ No newline at end of file
diff --git a/plugins/transport-nio/licenses/netty-transport-4.1.104.Final.jar.sha1 b/plugins/transport-nio/licenses/netty-transport-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..5cacaf11a29ce
--- /dev/null
+++ b/plugins/transport-nio/licenses/netty-transport-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+da7b263b6fedc5add70e78ee8927c8bd2b9bb589
\ No newline at end of file
diff --git a/plugins/transport-nio/src/test/java/org/opensearch/http/nio/NioHttpPipeliningHandlerTests.java b/plugins/transport-nio/src/test/java/org/opensearch/http/nio/NioHttpPipeliningHandlerTests.java
index 46cf6ae708d1c..d0c0406bd7774 100644
--- a/plugins/transport-nio/src/test/java/org/opensearch/http/nio/NioHttpPipeliningHandlerTests.java
+++ b/plugins/transport-nio/src/test/java/org/opensearch/http/nio/NioHttpPipeliningHandlerTests.java
@@ -80,7 +80,7 @@ public class NioHttpPipeliningHandlerTests extends OpenSearchTestCase {
     @After
     public void cleanup() throws Exception {
         waitingRequests.keySet().forEach(this::finishRequest);
-        shutdownExecutorService();
+        shutdownExecutorServices();
     }
 
     private CountDownLatch finishRequest(String url) {
@@ -88,7 +88,7 @@ private CountDownLatch finishRequest(String url) {
         return finishingRequests.get(url);
     }
 
-    private void shutdownExecutorService() throws InterruptedException {
+    private void shutdownExecutorServices() throws InterruptedException {
         if (!handlerService.isShutdown()) {
             handlerService.shutdown();
             handlerService.awaitTermination(10, TimeUnit.SECONDS);
diff --git a/plugins/transport-reactor-netty4/licenses/netty-buffer-4.1.101.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-buffer-4.1.101.Final.jar.sha1
deleted file mode 100644
index 7bb27bbfcb87d..0000000000000
--- a/plugins/transport-reactor-netty4/licenses/netty-buffer-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-a4d94fd6cdf7a37b15237e32434afd6b955cc591
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-buffer-4.1.104.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-buffer-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..30f215e47f8ad
--- /dev/null
+++ b/plugins/transport-reactor-netty4/licenses/netty-buffer-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+756797174b94a3aee11ce83522473f3c18287a43
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-codec-4.1.101.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-codec-4.1.101.Final.jar.sha1
deleted file mode 100644
index c792b4e834030..0000000000000
--- a/plugins/transport-reactor-netty4/licenses/netty-codec-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-642523c57c4be15b8b461be7b1532262d193bbb3
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-codec-4.1.104.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-codec-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..9ed9b896d4b4e
--- /dev/null
+++ b/plugins/transport-reactor-netty4/licenses/netty-codec-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+f51fcfd3baac88b2c0b8dc715932ad5622d17429
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-codec-dns-4.1.101.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-codec-dns-4.1.101.Final.jar.sha1
deleted file mode 100644
index 0789dea62778a..0000000000000
--- a/plugins/transport-reactor-netty4/licenses/netty-codec-dns-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-24d0f4f2b0b0b55acc498d62f9c0921d0ea6da7b
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-codec-dns-4.1.104.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-codec-dns-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..0232fc58f9357
--- /dev/null
+++ b/plugins/transport-reactor-netty4/licenses/netty-codec-dns-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+8e237ce67ab230ed1ba749d6651b278333c21b3f
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-codec-http-4.1.101.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-codec-http-4.1.101.Final.jar.sha1
deleted file mode 100644
index 8bf31f6c3a2c7..0000000000000
--- a/plugins/transport-reactor-netty4/licenses/netty-codec-http-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-c648f863b301e3fc62d0de098ec61be7628b8ea2
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-codec-http-4.1.104.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-codec-http-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..478e7cfba1470
--- /dev/null
+++ b/plugins/transport-reactor-netty4/licenses/netty-codec-http-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+2db1556de1b8dc07695604bf51a0a133263ad63f
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-codec-http2-4.1.101.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-codec-http2-4.1.101.Final.jar.sha1
deleted file mode 100644
index 48b42bfab9287..0000000000000
--- a/plugins/transport-reactor-netty4/licenses/netty-codec-http2-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-40590da6c615b852384542051330e9fd51d4c4b1
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-codec-http2-4.1.104.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-codec-http2-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..f0242709f34f7
--- /dev/null
+++ b/plugins/transport-reactor-netty4/licenses/netty-codec-http2-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+5bb757929f7c4d1bf12740a378a99643caaad1ac
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-common-4.1.101.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-common-4.1.101.Final.jar.sha1
deleted file mode 100644
index f4fe86799eaff..0000000000000
--- a/plugins/transport-reactor-netty4/licenses/netty-common-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-bdb16e4d308b5757123decc886896815d1daf7a3
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-common-4.1.104.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-common-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..1b533eea3b3b3
--- /dev/null
+++ b/plugins/transport-reactor-netty4/licenses/netty-common-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+ec5fc4a7c5475eb20805e14f7274aa28872b5ba1
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-handler-4.1.101.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-handler-4.1.101.Final.jar.sha1
deleted file mode 100644
index cfc0befee237a..0000000000000
--- a/plugins/transport-reactor-netty4/licenses/netty-handler-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-7800aea949bf95f63df73166d144e49405b279dd
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-handler-4.1.104.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-handler-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..70777be4dc636
--- /dev/null
+++ b/plugins/transport-reactor-netty4/licenses/netty-handler-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+18c0e659950cdef5f12c36eccfa14cbd2ad2049d
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-resolver-4.1.101.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-resolver-4.1.101.Final.jar.sha1
deleted file mode 100644
index f4425d5ac8e5f..0000000000000
--- a/plugins/transport-reactor-netty4/licenses/netty-resolver-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-5e7eddfa4dfffcbd375d265d1fd08297df94f82f
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-resolver-4.1.104.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-resolver-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..d7c15af9312fe
--- /dev/null
+++ b/plugins/transport-reactor-netty4/licenses/netty-resolver-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+dfa4fe5c3a6eabb7af09902eb63266829876d8a2
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-resolver-dns-4.1.101.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-resolver-dns-4.1.101.Final.jar.sha1
deleted file mode 100644
index 450c34d975bb9..0000000000000
--- a/plugins/transport-reactor-netty4/licenses/netty-resolver-dns-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-d3f503d7554cf25edc6b83b9b4724b240c6e91d5
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-resolver-dns-4.1.104.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-resolver-dns-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..987b524aedc98
--- /dev/null
+++ b/plugins/transport-reactor-netty4/licenses/netty-resolver-dns-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+f1210e5856fecb9182d58c0d33fa6e946b344b40
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-transport-4.1.101.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-transport-4.1.101.Final.jar.sha1
deleted file mode 100644
index fd9199092452b..0000000000000
--- a/plugins/transport-reactor-netty4/licenses/netty-transport-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-0b36cc2337b4a4135df7ee2f2d77431c3b541dc5
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-transport-4.1.104.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-transport-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..5cacaf11a29ce
--- /dev/null
+++ b/plugins/transport-reactor-netty4/licenses/netty-transport-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+da7b263b6fedc5add70e78ee8927c8bd2b9bb589
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-transport-native-unix-common-4.1.101.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-transport-native-unix-common-4.1.101.Final.jar.sha1
deleted file mode 100644
index 291c87ad7987b..0000000000000
--- a/plugins/transport-reactor-netty4/licenses/netty-transport-native-unix-common-4.1.101.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-d0697ef1d71c6111a1b18a387fa985fd6398ace2
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/netty-transport-native-unix-common-4.1.104.Final.jar.sha1 b/plugins/transport-reactor-netty4/licenses/netty-transport-native-unix-common-4.1.104.Final.jar.sha1
new file mode 100644
index 0000000000000..64797bf11aedc
--- /dev/null
+++ b/plugins/transport-reactor-netty4/licenses/netty-transport-native-unix-common-4.1.104.Final.jar.sha1
@@ -0,0 +1 @@
+d4da9f7237ac3ac292891e0b2d5364acbce128cf
\ No newline at end of file
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/test/indices.update_aliases/40_remove_with_must_exist.yml b/rest-api-spec/src/main/resources/rest-api-spec/test/indices.update_aliases/40_remove_with_must_exist.yml
new file mode 100644
index 0000000000000..dbf6a4fad3295
--- /dev/null
+++ b/rest-api-spec/src/main/resources/rest-api-spec/test/indices.update_aliases/40_remove_with_must_exist.yml
@@ -0,0 +1,141 @@
+---
+"Throw aliases missing exception when removing non-existing alias with setting must_exist to true":
+  - skip:
+      version: " - 2.99.99"
+      reason: "introduced in 3.0"
+
+  - do:
+      indices.create:
+        index: test_index
+
+  - do:
+      indices.exists_alias:
+        name: test_alias
+
+  - is_false: ''
+
+  - do:
+      catch: /aliases \[test_alias\] missing/
+      indices.update_aliases:
+        body:
+          actions:
+            - remove:
+                index: test_index
+                alias: test_alias
+                must_exist: true
+
+  - do:
+      catch: /aliases \[testAlias\*\] missing/
+      indices.update_aliases:
+        body:
+          actions:
+            - remove:
+                index: test_index
+                aliases: [ testAlias* ]
+                must_exist: true
+
+  - do:
+      catch: /\[aliases\] can't be empty/
+      indices.update_aliases:
+        body:
+          actions:
+            - remove:
+                index: test_index
+                aliases: []
+                must_exist: true
+
+---
+"Throw aliases missing exception when all of the specified aliases are non-existing":
+  - skip:
+      version: " - 2.99.99"
+      reason: "introduced in 3.0"
+
+  - do:
+      indices.create:
+        index: test_index
+
+  - do:
+      indices.exists_alias:
+        name: test_alias
+
+  - is_false: ''
+
+  - do:
+      catch: /aliases \[test\_alias\] missing/
+      indices.update_aliases:
+        body:
+          actions:
+            - remove:
+                index: test_index
+                alias: test_alias
+
+  - do:
+      catch: /aliases \[test\_alias\*\] missing/
+      indices.update_aliases:
+        body:
+          actions:
+            - remove:
+                indices: [ test_index ]
+                aliases: [ test_alias* ]
+
+---
+"Remove successfully when some specified aliases are non-existing":
+  - skip:
+      version: " - 2.99.99"
+      reason: "introduced in 3.0"
+
+  - do:
+      indices.create:
+        index: test_index
+
+  - do:
+      indices.exists_alias:
+        name: test_alias
+
+  - is_false: ''
+
+  - do:
+      indices.update_aliases:
+        body:
+          actions:
+            - add:
+                indices: [ test_index ]
+                aliases: [ test_alias ]
+
+  - do:
+      indices.update_aliases:
+        body:
+          actions:
+            - remove:
+                index: test_index
+                aliases: [test_alias, test_alias1, test_alias2]
+                must_exist: false
+
+  - match: { acknowledged: true }
+
+---
+"Remove silently when all of the specified aliases are non-existing and must_exist is false":
+  - skip:
+      version: " - 2.99.99"
+      reason: "introduced in 3.0"
+
+  - do:
+      indices.create:
+        index: test_index
+
+  - do:
+      indices.exists_alias:
+        name: test_alias
+
+  - is_false: ''
+
+  - do:
+      indices.update_aliases:
+        body:
+          actions:
+            - remove:
+                index: test_index
+                aliases: [test_alias, test_alias1, test_alias2]
+                must_exist: false
+
+  - match: { acknowledged: true }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/test/search/340_doc_values_field.yml b/rest-api-spec/src/main/resources/rest-api-spec/test/search/340_doc_values_field.yml
index f3281e35ac8e6..c7b00d5fbbef2 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/test/search/340_doc_values_field.yml
+++ b/rest-api-spec/src/main/resources/rest-api-spec/test/search/340_doc_values_field.yml
@@ -1,8 +1,8 @@
 setup:
   - skip:
       features: [ "headers" ]
-      version: " - 2.99.99"
-      reason: "searching with only doc_values was added in 3.0.0"
+      version: " - 2.11.99"
+      reason: "searching with only doc_values was added in 2.12.0"
 ---
 "search on fields with both index and doc_values enabled":
   - do:
diff --git a/server/licenses/lucene-analysis-common-9.8.0.jar.sha1 b/server/licenses/lucene-analysis-common-9.8.0.jar.sha1
deleted file mode 100644
index 6ad304fa52c12..0000000000000
--- a/server/licenses/lucene-analysis-common-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-36f0363325ca7bf62c180160d1ed5165c7c37795
\ No newline at end of file
diff --git a/server/licenses/lucene-analysis-common-9.9.1.jar.sha1 b/server/licenses/lucene-analysis-common-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..c9e6120da7497
--- /dev/null
+++ b/server/licenses/lucene-analysis-common-9.9.1.jar.sha1
@@ -0,0 +1 @@
+24c8401b530308f9568eb7b408c2029c63f564c6
\ No newline at end of file
diff --git a/server/licenses/lucene-backward-codecs-9.8.0.jar.sha1 b/server/licenses/lucene-backward-codecs-9.8.0.jar.sha1
deleted file mode 100644
index f104c4207d390..0000000000000
--- a/server/licenses/lucene-backward-codecs-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-e98fb408028f40170e6d87c16422bfdc0bb2e392
\ No newline at end of file
diff --git a/server/licenses/lucene-backward-codecs-9.9.1.jar.sha1 b/server/licenses/lucene-backward-codecs-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..69ecf6aa68200
--- /dev/null
+++ b/server/licenses/lucene-backward-codecs-9.9.1.jar.sha1
@@ -0,0 +1 @@
+11c46007366bb037be7d271ab0a5849b1d544662
\ No newline at end of file
diff --git a/server/licenses/lucene-core-9.8.0.jar.sha1 b/server/licenses/lucene-core-9.8.0.jar.sha1
deleted file mode 100644
index f9a3e2f3cbee6..0000000000000
--- a/server/licenses/lucene-core-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-5e8421c5f8573bcf22e9265fc7e19469545a775a
\ No newline at end of file
diff --git a/server/licenses/lucene-core-9.9.1.jar.sha1 b/server/licenses/lucene-core-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..ae596196d9e6a
--- /dev/null
+++ b/server/licenses/lucene-core-9.9.1.jar.sha1
@@ -0,0 +1 @@
+55249fa9a0ed321adcf8283c6f3b649a6812b0a9
\ No newline at end of file
diff --git a/server/licenses/lucene-grouping-9.8.0.jar.sha1 b/server/licenses/lucene-grouping-9.8.0.jar.sha1
deleted file mode 100644
index ab132121b2edc..0000000000000
--- a/server/licenses/lucene-grouping-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-d39184518351178c404ed9669fc6cb6111f2288d
\ No newline at end of file
diff --git a/server/licenses/lucene-grouping-9.9.1.jar.sha1 b/server/licenses/lucene-grouping-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..e7df056400661
--- /dev/null
+++ b/server/licenses/lucene-grouping-9.9.1.jar.sha1
@@ -0,0 +1 @@
+2f2785e17c5c823cc8f41a7ddb4647aaca8ee773
\ No newline at end of file
diff --git a/server/licenses/lucene-highlighter-9.8.0.jar.sha1 b/server/licenses/lucene-highlighter-9.8.0.jar.sha1
deleted file mode 100644
index c7cb678fb7b72..0000000000000
--- a/server/licenses/lucene-highlighter-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-1ac38c8278dbd63dfab30744a41dd955a415a31c
\ No newline at end of file
diff --git a/server/licenses/lucene-highlighter-9.9.1.jar.sha1 b/server/licenses/lucene-highlighter-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..828c7294aa586
--- /dev/null
+++ b/server/licenses/lucene-highlighter-9.9.1.jar.sha1
@@ -0,0 +1 @@
+30928513461bf79a5cb057e84da7d34a1e53227d
\ No newline at end of file
diff --git a/server/licenses/lucene-join-9.8.0.jar.sha1 b/server/licenses/lucene-join-9.8.0.jar.sha1
deleted file mode 100644
index 2b6cb8af4faf6..0000000000000
--- a/server/licenses/lucene-join-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-3d64fc57bb6e718d906413a9f73c713e6d4d8bb0
\ No newline at end of file
diff --git a/server/licenses/lucene-join-9.9.1.jar.sha1 b/server/licenses/lucene-join-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..34b44ca8c6ad5
--- /dev/null
+++ b/server/licenses/lucene-join-9.9.1.jar.sha1
@@ -0,0 +1 @@
+b9c8cc99632280148f92b4c0a64111c482d5d0ac
\ No newline at end of file
diff --git a/server/licenses/lucene-memory-9.8.0.jar.sha1 b/server/licenses/lucene-memory-9.8.0.jar.sha1
deleted file mode 100644
index 5fdfee401dd0a..0000000000000
--- a/server/licenses/lucene-memory-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-5283ac71d6ccecb5e00c7b52df2faec012f2625a
\ No newline at end of file
diff --git a/server/licenses/lucene-memory-9.9.1.jar.sha1 b/server/licenses/lucene-memory-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..b75fba4c331e9
--- /dev/null
+++ b/server/licenses/lucene-memory-9.9.1.jar.sha1
@@ -0,0 +1 @@
+49f820b1b321860fa42a4f7583e8ed8f77b9c1c2
\ No newline at end of file
diff --git a/server/licenses/lucene-misc-9.8.0.jar.sha1 b/server/licenses/lucene-misc-9.8.0.jar.sha1
deleted file mode 100644
index cf815cba15862..0000000000000
--- a/server/licenses/lucene-misc-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-9a57b049cf51a5e9c9c1909c420f645f1b6f9a54
\ No newline at end of file
diff --git a/server/licenses/lucene-misc-9.9.1.jar.sha1 b/server/licenses/lucene-misc-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..f1e1e056004e9
--- /dev/null
+++ b/server/licenses/lucene-misc-9.9.1.jar.sha1
@@ -0,0 +1 @@
+db7c30217602dfcda394a4d0f0a9e68140d385a6
\ No newline at end of file
diff --git a/server/licenses/lucene-queries-9.8.0.jar.sha1 b/server/licenses/lucene-queries-9.8.0.jar.sha1
deleted file mode 100644
index 09f369ef18e12..0000000000000
--- a/server/licenses/lucene-queries-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-628db4ef46f1c6a05145bdac1d1bc4ace6341b13
\ No newline at end of file
diff --git a/server/licenses/lucene-queries-9.9.1.jar.sha1 b/server/licenses/lucene-queries-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..888b9b4a05ec8
--- /dev/null
+++ b/server/licenses/lucene-queries-9.9.1.jar.sha1
@@ -0,0 +1 @@
+d157547bd24edc8e9d9d59c273107dc3ac5fde5e
\ No newline at end of file
diff --git a/server/licenses/lucene-queryparser-9.8.0.jar.sha1 b/server/licenses/lucene-queryparser-9.8.0.jar.sha1
deleted file mode 100644
index 2a42a8956b18b..0000000000000
--- a/server/licenses/lucene-queryparser-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-982faf2bfa55542bf57fbadef54c19ac00f57cae
\ No newline at end of file
diff --git a/server/licenses/lucene-queryparser-9.9.1.jar.sha1 b/server/licenses/lucene-queryparser-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..1ce8a069a0f4e
--- /dev/null
+++ b/server/licenses/lucene-queryparser-9.9.1.jar.sha1
@@ -0,0 +1 @@
+12d844fe224f6f97c510ac20d68903ed7f626f6c
\ No newline at end of file
diff --git a/server/licenses/lucene-sandbox-9.8.0.jar.sha1 b/server/licenses/lucene-sandbox-9.8.0.jar.sha1
deleted file mode 100644
index 64a0b07f72d29..0000000000000
--- a/server/licenses/lucene-sandbox-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-06493dbd14d02537716822254866a94458f4d842
\ No newline at end of file
diff --git a/server/licenses/lucene-sandbox-9.9.1.jar.sha1 b/server/licenses/lucene-sandbox-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..14fd86dadc404
--- /dev/null
+++ b/server/licenses/lucene-sandbox-9.9.1.jar.sha1
@@ -0,0 +1 @@
+272e588fd3d8c0a401b28a1ac715f27044bf62ec
\ No newline at end of file
diff --git a/server/licenses/lucene-spatial-extras-9.8.0.jar.sha1 b/server/licenses/lucene-spatial-extras-9.8.0.jar.sha1
deleted file mode 100644
index d1bcb0581435c..0000000000000
--- a/server/licenses/lucene-spatial-extras-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-9d9a731822ad6eefa1ba288a0c158d478522f165
\ No newline at end of file
diff --git a/server/licenses/lucene-spatial-extras-9.9.1.jar.sha1 b/server/licenses/lucene-spatial-extras-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..0efd5a7595bfe
--- /dev/null
+++ b/server/licenses/lucene-spatial-extras-9.9.1.jar.sha1
@@ -0,0 +1 @@
+e066432e7ab02b2a4914f989bcd8c44adbf340ad
\ No newline at end of file
diff --git a/server/licenses/lucene-spatial3d-9.8.0.jar.sha1 b/server/licenses/lucene-spatial3d-9.8.0.jar.sha1
deleted file mode 100644
index d17459cc569a9..0000000000000
--- a/server/licenses/lucene-spatial3d-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-ce752a52b2d4eac90633c7df7982e29504f99e76
\ No newline at end of file
diff --git a/server/licenses/lucene-spatial3d-9.9.1.jar.sha1 b/server/licenses/lucene-spatial3d-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..7f06466e4c721
--- /dev/null
+++ b/server/licenses/lucene-spatial3d-9.9.1.jar.sha1
@@ -0,0 +1 @@
+fa54c9b962778e28ebc0efb9f75297781350361a
\ No newline at end of file
diff --git a/server/licenses/lucene-suggest-9.8.0.jar.sha1 b/server/licenses/lucene-suggest-9.8.0.jar.sha1
deleted file mode 100644
index ff47b87672d2c..0000000000000
--- a/server/licenses/lucene-suggest-9.8.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-f977f96f2093b7fddea6b67caa2e1c5b10edebf6
\ No newline at end of file
diff --git a/server/licenses/lucene-suggest-9.9.1.jar.sha1 b/server/licenses/lucene-suggest-9.9.1.jar.sha1
new file mode 100644
index 0000000000000..06732480d1b6c
--- /dev/null
+++ b/server/licenses/lucene-suggest-9.9.1.jar.sha1
@@ -0,0 +1 @@
+9554de5b22ae7483b344b94a9a956960b7a5d49c
\ No newline at end of file
diff --git a/server/src/internalClusterTest/java/org/opensearch/cluster/allocation/AwarenessAllocationIT.java b/server/src/internalClusterTest/java/org/opensearch/cluster/allocation/AwarenessAllocationIT.java
index c69718d982f8b..522d63b22a0da 100644
--- a/server/src/internalClusterTest/java/org/opensearch/cluster/allocation/AwarenessAllocationIT.java
+++ b/server/src/internalClusterTest/java/org/opensearch/cluster/allocation/AwarenessAllocationIT.java
@@ -364,6 +364,7 @@ public void testAwarenessZonesIncrementalNodes() {
         assertThat(counts.get(noZoneNode), equalTo(2));
     }
 
+    @AwaitsFix(bugUrl = "https://github.com/opensearch-project/OpenSearch/issues/5908")
     public void testThreeZoneOneReplicaWithForceZoneValueAndLoadAwareness() throws Exception {
         int nodeCountPerAZ = 5;
         int numOfShards = 30;
diff --git a/server/src/internalClusterTest/java/org/opensearch/index/store/CorruptedFileIT.java b/server/src/internalClusterTest/java/org/opensearch/index/store/CorruptedFileIT.java
index 8291fef5d177b..f46f413f4d23f 100644
--- a/server/src/internalClusterTest/java/org/opensearch/index/store/CorruptedFileIT.java
+++ b/server/src/internalClusterTest/java/org/opensearch/index/store/CorruptedFileIT.java
@@ -710,6 +710,7 @@ public void testPrimaryCorruptionDuringReplicationDoesNotFailReplicaShard() thro
 
         final NodeStats primaryNode = dataNodeStats.get(0);
         final NodeStats replicaNode = dataNodeStats.get(1);
+
         assertAcked(
             prepareCreate("test").setSettings(
                 Settings.builder()
@@ -795,6 +796,17 @@ public void testPrimaryCorruptionDuringReplicationDoesNotFailReplicaShard() thro
 
         // Assert the cluster returns to green status because the replica will be promoted to primary
         ensureGreen();
+
+        // After Lucene 9.9 check index will flag corruption with old (not the latest) commit points.
+        // For this test our previous corrupt commit "segments_2" will remain on the primary.
+        // This asserts this is the case, and then resets check index status.
+        assertEquals("Check index has a single failure", 1, checkIndexFailures.size());
+        assertTrue(
+            checkIndexFailures.get(0)
+                .getMessage()
+                .contains("could not read old (not latest) commit point segments file \"segments_2\" in directory")
+        );
+        resetCheckIndexStatus();
     }
 
     private int numShards(String... index) {
diff --git a/server/src/internalClusterTest/java/org/opensearch/validate/SimpleValidateQueryIT.java b/server/src/internalClusterTest/java/org/opensearch/validate/SimpleValidateQueryIT.java
index e619b93cdd93b..4ac2e1669ca67 100644
--- a/server/src/internalClusterTest/java/org/opensearch/validate/SimpleValidateQueryIT.java
+++ b/server/src/internalClusterTest/java/org/opensearch/validate/SimpleValidateQueryIT.java
@@ -270,7 +270,10 @@ public void testExplainDateRangeInQueryString() {
 
         long twoMonthsAgo = now.minus(2, ChronoUnit.MONTHS).truncatedTo(ChronoUnit.DAYS).toEpochSecond() * 1000;
         long rangeEnd = (now.plus(1, ChronoUnit.DAYS).truncatedTo(ChronoUnit.DAYS).toEpochSecond() * 1000) - 1;
-        assertThat(response.getQueryExplanation().get(0).getExplanation(), equalTo("past:[" + twoMonthsAgo + " TO " + rangeEnd + "]"));
+        assertThat(
+            response.getQueryExplanation().get(0).getExplanation(),
+            containsString("past:[" + twoMonthsAgo + " TO " + rangeEnd + "]")
+        );
         assertThat(response.isValid(), equalTo(true));
     }
 
diff --git a/server/src/main/java/org/apache/lucene/queries/BlendedTermQuery.java b/server/src/main/java/org/apache/lucene/queries/BlendedTermQuery.java
index 345be330f048c..b47b974b96fed 100644
--- a/server/src/main/java/org/apache/lucene/queries/BlendedTermQuery.java
+++ b/server/src/main/java/org/apache/lucene/queries/BlendedTermQuery.java
@@ -100,11 +100,10 @@ public Query rewrite(IndexSearcher searcher) throws IOException {
             return rewritten;
         }
         IndexReader reader = searcher.getIndexReader();
-        IndexReaderContext context = reader.getContext();
         TermStates[] ctx = new TermStates[terms.length];
         int[] docFreqs = new int[ctx.length];
         for (int i = 0; i < terms.length; i++) {
-            ctx[i] = TermStates.build(context, terms[i], true);
+            ctx[i] = TermStates.build(searcher, terms[i], true);
             docFreqs[i] = ctx[i].docFreq();
         }
 
diff --git a/server/src/main/java/org/apache/lucene/search/grouping/CollapseTopFieldDocs.java b/server/src/main/java/org/apache/lucene/search/grouping/CollapseTopFieldDocs.java
index e93e5cdcc3f7b..961587113173d 100644
--- a/server/src/main/java/org/apache/lucene/search/grouping/CollapseTopFieldDocs.java
+++ b/server/src/main/java/org/apache/lucene/search/grouping/CollapseTopFieldDocs.java
@@ -33,6 +33,7 @@
 
 import org.apache.lucene.search.FieldComparator;
 import org.apache.lucene.search.FieldDoc;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.ScoreDoc;
 import org.apache.lucene.search.Sort;
 import org.apache.lucene.search.SortField;
@@ -144,7 +145,7 @@ private static class MergeSortQueue extends PriorityQueue<ShardRef> {
             reverseMul = new int[sortFields.length];
             for (int compIDX = 0; compIDX < sortFields.length; compIDX++) {
                 final SortField sortField = sortFields[compIDX];
-                comparators[compIDX] = sortField.getComparator(1, false);
+                comparators[compIDX] = sortField.getComparator(1, Pruning.NONE);
                 reverseMul[compIDX] = sortField.getReverse() ? -1 : 1;
             }
         }
diff --git a/server/src/main/java/org/opensearch/action/admin/indices/alias/IndicesAliasesRequest.java b/server/src/main/java/org/opensearch/action/admin/indices/alias/IndicesAliasesRequest.java
index bc27c70282368..6ce62dda32d0a 100644
--- a/server/src/main/java/org/opensearch/action/admin/indices/alias/IndicesAliasesRequest.java
+++ b/server/src/main/java/org/opensearch/action/admin/indices/alias/IndicesAliasesRequest.java
@@ -220,9 +220,11 @@ private static ObjectParser<AliasActions, Void> parser(String name, Supplier<Ali
             ADD_PARSER.declareField(AliasActions::searchRouting, XContentParser::text, SEARCH_ROUTING, ValueType.INT);
             ADD_PARSER.declareField(AliasActions::writeIndex, XContentParser::booleanValue, IS_WRITE_INDEX, ValueType.BOOLEAN);
             ADD_PARSER.declareField(AliasActions::isHidden, XContentParser::booleanValue, IS_HIDDEN, ValueType.BOOLEAN);
-            ADD_PARSER.declareField(AliasActions::mustExist, XContentParser::booleanValue, MUST_EXIST, ValueType.BOOLEAN);
         }
         private static final ObjectParser<AliasActions, Void> REMOVE_PARSER = parser(REMOVE.getPreferredName(), AliasActions::remove);
+        static {
+            REMOVE_PARSER.declareField(AliasActions::mustExist, XContentParser::booleanValue, MUST_EXIST, ValueType.BOOLEAN);
+        }
         private static final ObjectParser<AliasActions, Void> REMOVE_INDEX_PARSER = parser(
             REMOVE_INDEX.getPreferredName(),
             AliasActions::removeIndex
@@ -554,6 +556,9 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
             if (null != isHidden) {
                 builder.field(IS_HIDDEN.getPreferredName(), isHidden);
             }
+            if (null != mustExist) {
+                builder.field(MUST_EXIST.getPreferredName(), mustExist);
+            }
             builder.endObject();
             builder.endObject();
             return builder;
@@ -582,6 +587,8 @@ public String toString() {
                 + searchRouting
                 + ",writeIndex="
                 + writeIndex
+                + ",mustExist="
+                + mustExist
                 + "]";
         }
 
@@ -600,12 +607,13 @@ public boolean equals(Object obj) {
                 && Objects.equals(indexRouting, other.indexRouting)
                 && Objects.equals(searchRouting, other.searchRouting)
                 && Objects.equals(writeIndex, other.writeIndex)
-                && Objects.equals(isHidden, other.isHidden);
+                && Objects.equals(isHidden, other.isHidden)
+                && Objects.equals(mustExist, other.mustExist);
         }
 
         @Override
         public int hashCode() {
-            return Objects.hash(type, indices, aliases, filter, routing, indexRouting, searchRouting, writeIndex, isHidden);
+            return Objects.hash(type, indices, aliases, filter, routing, indexRouting, searchRouting, writeIndex, isHidden, mustExist);
         }
     }
 
diff --git a/server/src/main/java/org/opensearch/action/admin/indices/alias/TransportIndicesAliasesAction.java b/server/src/main/java/org/opensearch/action/admin/indices/alias/TransportIndicesAliasesAction.java
index 769044f3dafb7..81cb3102cfcb9 100644
--- a/server/src/main/java/org/opensearch/action/admin/indices/alias/TransportIndicesAliasesAction.java
+++ b/server/src/main/java/org/opensearch/action/admin/indices/alias/TransportIndicesAliasesAction.java
@@ -50,6 +50,7 @@
 import org.opensearch.cluster.metadata.MetadataIndexAliasesService;
 import org.opensearch.cluster.service.ClusterService;
 import org.opensearch.common.inject.Inject;
+import org.opensearch.common.regex.Regex;
 import org.opensearch.core.action.ActionListener;
 import org.opensearch.core.common.io.stream.StreamInput;
 import org.opensearch.core.index.Index;
@@ -59,6 +60,7 @@
 
 import java.io.IOException;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
@@ -220,12 +222,33 @@ private static String[] concreteAliases(IndicesAliasesRequest.AliasActions actio
             // for DELETE we expand the aliases
             String[] indexAsArray = { concreteIndex };
             final Map<String, List<AliasMetadata>> aliasMetadata = metadata.findAliases(action, indexAsArray);
-            List<String> finalAliases = new ArrayList<>();
+            Set<String> finalAliases = new HashSet<>();
             for (final List<AliasMetadata> curAliases : aliasMetadata.values()) {
                 for (AliasMetadata aliasMeta : curAliases) {
                     finalAliases.add(aliasMeta.alias());
                 }
             }
+
+            // must_exist can only be set in the Remove Action in Update aliases API,
+            // we check the value here to make the behavior consistent with Delete aliases API
+            if (action.mustExist() != null) {
+                // if must_exist is false, we should make the remove action execute silently,
+                // so we return the original specified aliases to avoid AliasesNotFoundException
+                if (!action.mustExist()) {
+                    return action.aliases();
+                }
+
+                // if there is any non-existing aliases specified in the request and must_exist is true, throw exception in advance
+                if (finalAliases.isEmpty()) {
+                    throw new AliasesNotFoundException(action.aliases());
+                }
+                String[] nonExistingAliases = Arrays.stream(action.aliases())
+                    .filter(originalAlias -> finalAliases.stream().noneMatch(finalAlias -> Regex.simpleMatch(originalAlias, finalAlias)))
+                    .toArray(String[]::new);
+                if (nonExistingAliases.length != 0) {
+                    throw new AliasesNotFoundException(nonExistingAliases);
+                }
+            }
             return finalAliases.toArray(new String[0]);
         } else {
             // for ADD and REMOVE_INDEX we just return the current aliases
diff --git a/server/src/main/java/org/opensearch/action/search/BottomSortValuesCollector.java b/server/src/main/java/org/opensearch/action/search/BottomSortValuesCollector.java
index c831c80b6455c..bce8d9fb2b1ca 100644
--- a/server/src/main/java/org/opensearch/action/search/BottomSortValuesCollector.java
+++ b/server/src/main/java/org/opensearch/action/search/BottomSortValuesCollector.java
@@ -34,6 +34,7 @@
 
 import org.apache.lucene.search.FieldComparator;
 import org.apache.lucene.search.FieldDoc;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.SortField;
 import org.apache.lucene.search.TopFieldDocs;
 import org.opensearch.search.DocValueFormat;
@@ -59,7 +60,7 @@ class BottomSortValuesCollector {
         this.reverseMuls = new int[sortFields.length];
         this.sortFields = sortFields;
         for (int i = 0; i < sortFields.length; i++) {
-            comparators[i] = sortFields[i].getComparator(1, false);
+            comparators[i] = sortFields[i].getComparator(1, Pruning.NONE);
             reverseMuls[i] = sortFields[i].getReverse() ? -1 : 1;
         }
     }
diff --git a/server/src/main/java/org/opensearch/action/search/SearchQueryAggregationCategorizer.java b/server/src/main/java/org/opensearch/action/search/SearchQueryAggregationCategorizer.java
new file mode 100644
index 0000000000000..607ccf182851b
--- /dev/null
+++ b/server/src/main/java/org/opensearch/action/search/SearchQueryAggregationCategorizer.java
@@ -0,0 +1,55 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.action.search;
+
+import org.opensearch.search.aggregations.AggregationBuilder;
+import org.opensearch.search.aggregations.PipelineAggregationBuilder;
+import org.opensearch.telemetry.metrics.tags.Tags;
+
+import java.util.Collection;
+
+/**
+ * Increments the counters related to Aggregation Search Queries.
+ */
+public class SearchQueryAggregationCategorizer {
+
+    private static final String TYPE_TAG = "type";
+    private final SearchQueryCounters searchQueryCounters;
+
+    public SearchQueryAggregationCategorizer(SearchQueryCounters searchQueryCounters) {
+        this.searchQueryCounters = searchQueryCounters;
+    }
+
+    public void incrementSearchQueryAggregationCounters(Collection<AggregationBuilder> aggregatorFactories) {
+        for (AggregationBuilder aggregationBuilder : aggregatorFactories) {
+            incrementCountersRecursively(aggregationBuilder);
+        }
+    }
+
+    private void incrementCountersRecursively(AggregationBuilder aggregationBuilder) {
+        // Increment counters for the current aggregation
+        String aggregationType = aggregationBuilder.getType();
+        searchQueryCounters.aggCounter.add(1, Tags.create().addTag(TYPE_TAG, aggregationType));
+
+        // Recursively process sub-aggregations if any
+        Collection<AggregationBuilder> subAggregations = aggregationBuilder.getSubAggregations();
+        if (subAggregations != null && !subAggregations.isEmpty()) {
+            for (AggregationBuilder subAggregation : subAggregations) {
+                incrementCountersRecursively(subAggregation);
+            }
+        }
+
+        // Process pipeline aggregations
+        Collection<PipelineAggregationBuilder> pipelineAggregations = aggregationBuilder.getPipelineAggregations();
+        for (PipelineAggregationBuilder pipelineAggregation : pipelineAggregations) {
+            String pipelineAggregationType = pipelineAggregation.getType();
+            searchQueryCounters.aggCounter.add(1, Tags.create().addTag(TYPE_TAG, pipelineAggregationType));
+        }
+    }
+}
diff --git a/server/src/main/java/org/opensearch/action/search/SearchQueryCategorizer.java b/server/src/main/java/org/opensearch/action/search/SearchQueryCategorizer.java
index 8fe1be610f9af..ffaae5b08772f 100644
--- a/server/src/main/java/org/opensearch/action/search/SearchQueryCategorizer.java
+++ b/server/src/main/java/org/opensearch/action/search/SearchQueryCategorizer.java
@@ -32,13 +32,15 @@ final class SearchQueryCategorizer {
 
     final SearchQueryCounters searchQueryCounters;
 
+    final SearchQueryAggregationCategorizer searchQueryAggregationCategorizer;
+
     public SearchQueryCategorizer(MetricsRegistry metricsRegistry) {
         searchQueryCounters = new SearchQueryCounters(metricsRegistry);
+        searchQueryAggregationCategorizer = new SearchQueryAggregationCategorizer(searchQueryCounters);
     }
 
     public void categorize(SearchSourceBuilder source) {
         QueryBuilder topLevelQueryBuilder = source.query();
-
         logQueryShape(topLevelQueryBuilder);
         incrementQueryTypeCounters(topLevelQueryBuilder);
         incrementQueryAggregationCounters(source.aggregations());
@@ -56,9 +58,11 @@ private void incrementQuerySortCounters(List<SortBuilder<?>> sorts) {
     }
 
     private void incrementQueryAggregationCounters(AggregatorFactories.Builder aggregations) {
-        if (aggregations != null) {
-            searchQueryCounters.aggCounter.add(1);
+        if (aggregations == null) {
+            return;
         }
+
+        searchQueryAggregationCategorizer.incrementSearchQueryAggregationCounters(aggregations.getAggregatorFactories());
     }
 
     private void incrementQueryTypeCounters(QueryBuilder topLevelQueryBuilder) {
diff --git a/server/src/main/java/org/opensearch/action/search/SearchQueryCategorizingVisitor.java b/server/src/main/java/org/opensearch/action/search/SearchQueryCategorizingVisitor.java
index 98f0169e69a5c..31f83dbef9dc9 100644
--- a/server/src/main/java/org/opensearch/action/search/SearchQueryCategorizingVisitor.java
+++ b/server/src/main/java/org/opensearch/action/search/SearchQueryCategorizingVisitor.java
@@ -9,26 +9,14 @@
 package org.opensearch.action.search;
 
 import org.apache.lucene.search.BooleanClause;
-import org.opensearch.index.query.BoolQueryBuilder;
-import org.opensearch.index.query.MatchPhraseQueryBuilder;
-import org.opensearch.index.query.MatchQueryBuilder;
-import org.opensearch.index.query.MultiMatchQueryBuilder;
 import org.opensearch.index.query.QueryBuilder;
 import org.opensearch.index.query.QueryBuilderVisitor;
-import org.opensearch.index.query.QueryStringQueryBuilder;
-import org.opensearch.index.query.RangeQueryBuilder;
-import org.opensearch.index.query.RegexpQueryBuilder;
-import org.opensearch.index.query.TermQueryBuilder;
-import org.opensearch.index.query.WildcardQueryBuilder;
-import org.opensearch.index.query.functionscore.FunctionScoreQueryBuilder;
-import org.opensearch.telemetry.metrics.tags.Tags;
 
 /**
- * Class to visit the querybuilder tree and also track the level information.
+ * Class to visit the query builder tree and also track the level information.
  * Increments the counters related to Search Query type.
  */
 final class SearchQueryCategorizingVisitor implements QueryBuilderVisitor {
-    private static final String LEVEL_TAG = "level";
     private final int level;
     private final SearchQueryCounters searchQueryCounters;
 
@@ -42,29 +30,7 @@ private SearchQueryCategorizingVisitor(SearchQueryCounters counters, int level)
     }
 
     public void accept(QueryBuilder qb) {
-        if (qb instanceof BoolQueryBuilder) {
-            searchQueryCounters.boolCounter.add(1, Tags.create().addTag(LEVEL_TAG, level));
-        } else if (qb instanceof FunctionScoreQueryBuilder) {
-            searchQueryCounters.functionScoreCounter.add(1, Tags.create().addTag(LEVEL_TAG, level));
-        } else if (qb instanceof MatchQueryBuilder) {
-            searchQueryCounters.matchCounter.add(1, Tags.create().addTag(LEVEL_TAG, level));
-        } else if (qb instanceof MatchPhraseQueryBuilder) {
-            searchQueryCounters.matchPhrasePrefixCounter.add(1, Tags.create().addTag(LEVEL_TAG, level));
-        } else if (qb instanceof MultiMatchQueryBuilder) {
-            searchQueryCounters.multiMatchCounter.add(1, Tags.create().addTag(LEVEL_TAG, level));
-        } else if (qb instanceof QueryStringQueryBuilder) {
-            searchQueryCounters.queryStringQueryCounter.add(1, Tags.create().addTag(LEVEL_TAG, level));
-        } else if (qb instanceof RangeQueryBuilder) {
-            searchQueryCounters.rangeCounter.add(1, Tags.create().addTag(LEVEL_TAG, level));
-        } else if (qb instanceof RegexpQueryBuilder) {
-            searchQueryCounters.regexCounter.add(1, Tags.create().addTag(LEVEL_TAG, level));
-        } else if (qb instanceof TermQueryBuilder) {
-            searchQueryCounters.termCounter.add(1, Tags.create().addTag(LEVEL_TAG, level));
-        } else if (qb instanceof WildcardQueryBuilder) {
-            searchQueryCounters.wildcardCounter.add(1, Tags.create().addTag(LEVEL_TAG, level));
-        } else {
-            searchQueryCounters.otherQueryCounter.add(1, Tags.create().addTag(LEVEL_TAG, level));
-        }
+        searchQueryCounters.incrementCounter(qb, level);
     }
 
     public QueryBuilderVisitor getChildVisitor(BooleanClause.Occur occur) {
diff --git a/server/src/main/java/org/opensearch/action/search/SearchQueryCounters.java b/server/src/main/java/org/opensearch/action/search/SearchQueryCounters.java
index 7e0259af07701..bbb883809b41b 100644
--- a/server/src/main/java/org/opensearch/action/search/SearchQueryCounters.java
+++ b/server/src/main/java/org/opensearch/action/search/SearchQueryCounters.java
@@ -8,33 +8,82 @@
 
 package org.opensearch.action.search;
 
+import org.opensearch.index.query.BoolQueryBuilder;
+import org.opensearch.index.query.BoostingQueryBuilder;
+import org.opensearch.index.query.ConstantScoreQueryBuilder;
+import org.opensearch.index.query.DisMaxQueryBuilder;
+import org.opensearch.index.query.DistanceFeatureQueryBuilder;
+import org.opensearch.index.query.ExistsQueryBuilder;
+import org.opensearch.index.query.FieldMaskingSpanQueryBuilder;
+import org.opensearch.index.query.FuzzyQueryBuilder;
+import org.opensearch.index.query.GeoBoundingBoxQueryBuilder;
+import org.opensearch.index.query.GeoDistanceQueryBuilder;
+import org.opensearch.index.query.GeoPolygonQueryBuilder;
+import org.opensearch.index.query.GeoShapeQueryBuilder;
+import org.opensearch.index.query.IntervalQueryBuilder;
+import org.opensearch.index.query.MatchAllQueryBuilder;
+import org.opensearch.index.query.MatchPhraseQueryBuilder;
+import org.opensearch.index.query.MatchQueryBuilder;
+import org.opensearch.index.query.MultiMatchQueryBuilder;
+import org.opensearch.index.query.PrefixQueryBuilder;
+import org.opensearch.index.query.QueryBuilder;
+import org.opensearch.index.query.QueryStringQueryBuilder;
+import org.opensearch.index.query.RangeQueryBuilder;
+import org.opensearch.index.query.RegexpQueryBuilder;
+import org.opensearch.index.query.ScriptQueryBuilder;
+import org.opensearch.index.query.SimpleQueryStringBuilder;
+import org.opensearch.index.query.TermQueryBuilder;
+import org.opensearch.index.query.WildcardQueryBuilder;
+import org.opensearch.index.query.functionscore.FunctionScoreQueryBuilder;
 import org.opensearch.telemetry.metrics.Counter;
 import org.opensearch.telemetry.metrics.MetricsRegistry;
+import org.opensearch.telemetry.metrics.tags.Tags;
+
+import java.util.HashMap;
+import java.util.Map;
 
 /**
  * Class contains all the Counters related to search query types.
  */
 final class SearchQueryCounters {
+    private static final String LEVEL_TAG = "level";
     private static final String UNIT = "1";
     private final MetricsRegistry metricsRegistry;
 
     // Counters related to Query types
     public final Counter aggCounter;
     public final Counter boolCounter;
+    public final Counter boostingCounter;
+    public final Counter constantScoreCounter;
+    public final Counter disMaxCounter;
+    public final Counter distanceFeatureCounter;
+    public final Counter existsCounter;
+    public final Counter fieldMaskingSpanCounter;
     public final Counter functionScoreCounter;
+    public final Counter fuzzyCounter;
+    public final Counter geoBoundingBoxCounter;
+    public final Counter geoDistanceCounter;
+    public final Counter geoPolygonCounter;
+    public final Counter geoShapeCounter;
+    public final Counter intervalCounter;
     public final Counter matchCounter;
+    public final Counter matchallCounter;
     public final Counter matchPhrasePrefixCounter;
     public final Counter multiMatchCounter;
     public final Counter otherQueryCounter;
-    public final Counter queryStringQueryCounter;
+    public final Counter prefixCounter;
+    public final Counter queryStringCounter;
     public final Counter rangeCounter;
-    public final Counter regexCounter;
-
+    public final Counter regexpCounter;
+    public final Counter scriptCounter;
+    public final Counter simpleQueryStringCounter;
     public final Counter sortCounter;
     public final Counter skippedCounter;
     public final Counter termCounter;
     public final Counter totalCounter;
     public final Counter wildcardCounter;
+    public final Counter numberOfInputFieldsCounter;
+    private final Map<Class<? extends QueryBuilder>, Counter> queryHandlers;
 
     public SearchQueryCounters(MetricsRegistry metricsRegistry) {
         this.metricsRegistry = metricsRegistry;
@@ -48,16 +97,81 @@ public SearchQueryCounters(MetricsRegistry metricsRegistry) {
             "Counter for the number of top level and nested bool search queries",
             UNIT
         );
+        this.boostingCounter = metricsRegistry.createCounter(
+            "search.query.type.boost.count",
+            "Counter for the number of top level and nested boost search queries",
+            UNIT
+        );
+        this.constantScoreCounter = metricsRegistry.createCounter(
+            "search.query.type.counstantscore.count",
+            "Counter for the number of top level and nested constant score search queries",
+            UNIT
+        );
+        this.disMaxCounter = metricsRegistry.createCounter(
+            "search.query.type.dismax.count",
+            "Counter for the number of top level and nested disjuntion max search queries",
+            UNIT
+        );
+        this.distanceFeatureCounter = metricsRegistry.createCounter(
+            "search.query.type.distancefeature.count",
+            "Counter for the number of top level and nested distance feature search queries",
+            UNIT
+        );
+        this.existsCounter = metricsRegistry.createCounter(
+            "search.query.type.exists.count",
+            "Counter for the number of top level and nested exists search queries",
+            UNIT
+        );
+        this.fieldMaskingSpanCounter = metricsRegistry.createCounter(
+            "search.query.type.fieldmaskingspan.count",
+            "Counter for the number of top level and nested field masking span search queries",
+            UNIT
+        );
         this.functionScoreCounter = metricsRegistry.createCounter(
             "search.query.type.functionscore.count",
             "Counter for the number of top level and nested function score search queries",
             UNIT
         );
+        this.fuzzyCounter = metricsRegistry.createCounter(
+            "search.query.type.fuzzy.count",
+            "Counter for the number of top level and nested fuzzy search queries",
+            UNIT
+        );
+        this.geoBoundingBoxCounter = metricsRegistry.createCounter(
+            "search.query.type.geoboundingbox.count",
+            "Counter for the number of top level and nested geo bounding box queries",
+            UNIT
+        );
+        this.geoDistanceCounter = metricsRegistry.createCounter(
+            "search.query.type.geodistance.count",
+            "Counter for the number of top level and nested geo distance queries",
+            UNIT
+        );
+        this.geoPolygonCounter = metricsRegistry.createCounter(
+            "search.query.type.geopolygon.count",
+            "Counter for the number of top level and nested geo polygon queries",
+            UNIT
+        );
+        this.geoShapeCounter = metricsRegistry.createCounter(
+            "search.query.type.geoshape.count",
+            "Counter for the number of top level and nested geo shape queries",
+            UNIT
+        );
+        this.intervalCounter = metricsRegistry.createCounter(
+            "search.query.type.interval.count",
+            "Counter for the number of top level and nested interval queries",
+            UNIT
+        );
         this.matchCounter = metricsRegistry.createCounter(
             "search.query.type.match.count",
             "Counter for the number of top level and nested match search queries",
             UNIT
         );
+        this.matchallCounter = metricsRegistry.createCounter(
+            "search.query.type.matchall.count",
+            "Counter for the number of top level and nested match all search queries",
+            UNIT
+        );
         this.matchPhrasePrefixCounter = metricsRegistry.createCounter(
             "search.query.type.matchphrase.count",
             "Counter for the number of top level and nested match phrase prefix search queries",
@@ -73,7 +187,12 @@ public SearchQueryCounters(MetricsRegistry metricsRegistry) {
             "Counter for the number of top level and nested search queries that do not match any other categories",
             UNIT
         );
-        this.queryStringQueryCounter = metricsRegistry.createCounter(
+        this.prefixCounter = metricsRegistry.createCounter(
+            "search.query.type.prefix.count",
+            "Counter for the number of top level and nested search queries that match prefix queries",
+            UNIT
+        );
+        this.queryStringCounter = metricsRegistry.createCounter(
             "search.query.type.querystringquery.count",
             "Counter for the number of top level and nested queryStringQuery search queries",
             UNIT
@@ -83,11 +202,21 @@ public SearchQueryCounters(MetricsRegistry metricsRegistry) {
             "Counter for the number of top level and nested range search queries",
             UNIT
         );
-        this.regexCounter = metricsRegistry.createCounter(
+        this.regexpCounter = metricsRegistry.createCounter(
             "search.query.type.regex.count",
             "Counter for the number of top level and nested regex search queries",
             UNIT
         );
+        this.scriptCounter = metricsRegistry.createCounter(
+            "search.query.type.script.count",
+            "Counter for the number of top level and nested script search queries",
+            UNIT
+        );
+        this.simpleQueryStringCounter = metricsRegistry.createCounter(
+            "search.query.type.simplequerystring.count",
+            "Counter for the number of top level and nested script simple query string search queries",
+            UNIT
+        );
         this.skippedCounter = metricsRegistry.createCounter(
             "search.query.type.skipped.count",
             "Counter for the number queries skipped due to error",
@@ -113,5 +242,51 @@ public SearchQueryCounters(MetricsRegistry metricsRegistry) {
             "Counter for the number of top level and nested wildcard search queries",
             UNIT
         );
+        this.numberOfInputFieldsCounter = metricsRegistry.createCounter(
+            "search.query.type.numberofinputfields.count",
+            "Counter for the number of input fields in the search queries",
+            UNIT
+        );
+        this.queryHandlers = new HashMap<>();
+        initializeQueryHandlers();
+    }
+
+    public void incrementCounter(QueryBuilder queryBuilder, int level) {
+        Counter counter = queryHandlers.get(queryBuilder.getClass());
+        if (counter != null) {
+            counter.add(1, Tags.create().addTag(LEVEL_TAG, level));
+        } else {
+            otherQueryCounter.add(1, Tags.create().addTag(LEVEL_TAG, level));
+        }
+    }
+
+    private void initializeQueryHandlers() {
+
+        queryHandlers.put(BoolQueryBuilder.class, boolCounter);
+        queryHandlers.put(FunctionScoreQueryBuilder.class, functionScoreCounter);
+        queryHandlers.put(MatchQueryBuilder.class, matchCounter);
+        queryHandlers.put(MatchPhraseQueryBuilder.class, matchPhrasePrefixCounter);
+        queryHandlers.put(MultiMatchQueryBuilder.class, multiMatchCounter);
+        queryHandlers.put(QueryStringQueryBuilder.class, queryStringCounter);
+        queryHandlers.put(RangeQueryBuilder.class, rangeCounter);
+        queryHandlers.put(RegexpQueryBuilder.class, regexpCounter);
+        queryHandlers.put(TermQueryBuilder.class, termCounter);
+        queryHandlers.put(WildcardQueryBuilder.class, wildcardCounter);
+        queryHandlers.put(BoostingQueryBuilder.class, boostingCounter);
+        queryHandlers.put(ConstantScoreQueryBuilder.class, constantScoreCounter);
+        queryHandlers.put(DisMaxQueryBuilder.class, disMaxCounter);
+        queryHandlers.put(DistanceFeatureQueryBuilder.class, distanceFeatureCounter);
+        queryHandlers.put(ExistsQueryBuilder.class, existsCounter);
+        queryHandlers.put(FieldMaskingSpanQueryBuilder.class, fieldMaskingSpanCounter);
+        queryHandlers.put(FuzzyQueryBuilder.class, fuzzyCounter);
+        queryHandlers.put(GeoBoundingBoxQueryBuilder.class, geoBoundingBoxCounter);
+        queryHandlers.put(GeoDistanceQueryBuilder.class, geoDistanceCounter);
+        queryHandlers.put(GeoPolygonQueryBuilder.class, geoPolygonCounter);
+        queryHandlers.put(GeoShapeQueryBuilder.class, geoShapeCounter);
+        queryHandlers.put(IntervalQueryBuilder.class, intervalCounter);
+        queryHandlers.put(MatchAllQueryBuilder.class, matchallCounter);
+        queryHandlers.put(PrefixQueryBuilder.class, prefixCounter);
+        queryHandlers.put(ScriptQueryBuilder.class, scriptCounter);
+        queryHandlers.put(SimpleQueryStringBuilder.class, simpleQueryStringCounter);
     }
 }
diff --git a/server/src/main/java/org/opensearch/cluster/metadata/AliasAction.java b/server/src/main/java/org/opensearch/cluster/metadata/AliasAction.java
index 47c6cad04343e..dac6ecaa13781 100644
--- a/server/src/main/java/org/opensearch/cluster/metadata/AliasAction.java
+++ b/server/src/main/java/org/opensearch/cluster/metadata/AliasAction.java
@@ -35,6 +35,7 @@
 import org.opensearch.action.admin.indices.alias.IndicesAliasesRequest;
 import org.opensearch.common.Nullable;
 import org.opensearch.core.common.Strings;
+import org.opensearch.rest.action.admin.indices.AliasesNotFoundException;
 
 /**
  * Individual operation to perform on the cluster state as part of an {@link IndicesAliasesRequest}.
@@ -225,8 +226,8 @@ boolean removeIndex() {
         @Override
         boolean apply(NewAliasValidator aliasValidator, Metadata.Builder metadata, IndexMetadata index) {
             if (false == index.getAliases().containsKey(alias)) {
-                if (mustExist != null && mustExist.booleanValue()) {
-                    throw new IllegalArgumentException("required alias [" + alias + "] does not exist");
+                if (mustExist != null && mustExist) {
+                    throw new AliasesNotFoundException(alias);
                 }
                 return false;
             }
diff --git a/server/src/main/java/org/opensearch/common/cache/Cache.java b/server/src/main/java/org/opensearch/common/cache/Cache.java
index 30e7c014a2ec0..d8aa4e93735e6 100644
--- a/server/src/main/java/org/opensearch/common/cache/Cache.java
+++ b/server/src/main/java/org/opensearch/common/cache/Cache.java
@@ -424,68 +424,74 @@ public V computeIfAbsent(K key, CacheLoader<K, V> loader) throws ExecutionExcept
             }
         });
         if (value == null) {
-            // we need to synchronize loading of a value for a given key; however, holding the segment lock while
-            // invoking load can lead to deadlock against another thread due to dependent key loading; therefore, we
-            // need a mechanism to ensure that load is invoked at most once, but we are not invoking load while holding
-            // the segment lock; to do this, we atomically put a future in the map that can load the value, and then
-            // get the value from this future on the thread that won the race to place the future into the segment map
-            CacheSegment<K, V> segment = getCacheSegment(key);
-            CompletableFuture<Entry<K, V>> future;
-            CompletableFuture<Entry<K, V>> completableFuture = new CompletableFuture<>();
+            value = compute(key, loader);
+        }
+        return value;
+    }
 
-            try (ReleasableLock ignored = segment.writeLock.acquire()) {
-                future = segment.map.putIfAbsent(key, completableFuture);
-            }
+    private V compute(K key, CacheLoader<K, V> loader) throws ExecutionException {
+        long now = now();
+        // we need to synchronize loading of a value for a given key; however, holding the segment lock while
+        // invoking load can lead to deadlock against another thread due to dependent key loading; therefore, we
+        // need a mechanism to ensure that load is invoked at most once, but we are not invoking load while holding
+        // the segment lock; to do this, we atomically put a future in the map that can load the value, and then
+        // get the value from this future on the thread that won the race to place the future into the segment map
+        CacheSegment<K, V> segment = getCacheSegment(key);
+        CompletableFuture<Entry<K, V>> future;
+        CompletableFuture<Entry<K, V>> completableFuture = new CompletableFuture<>();
 
-            BiFunction<? super Entry<K, V>, Throwable, ? extends V> handler = (ok, ex) -> {
-                if (ok != null) {
-                    try (ReleasableLock ignored = lruLock.acquire()) {
-                        promote(ok, now);
-                    }
-                    return ok.value;
-                } else {
-                    try (ReleasableLock ignored = segment.writeLock.acquire()) {
-                        CompletableFuture<Entry<K, V>> sanity = segment.map.get(key);
-                        if (sanity != null && sanity.isCompletedExceptionally()) {
-                            segment.map.remove(key);
-                        }
-                    }
-                    return null;
-                }
-            };
+        try (ReleasableLock ignored = segment.writeLock.acquire()) {
+            future = segment.map.putIfAbsent(key, completableFuture);
+        }
 
-            CompletableFuture<V> completableValue;
-            if (future == null) {
-                future = completableFuture;
-                completableValue = future.handle(handler);
-                V loaded;
-                try {
-                    loaded = loader.load(key);
-                } catch (Exception e) {
-                    future.completeExceptionally(e);
-                    throw new ExecutionException(e);
-                }
-                if (loaded == null) {
-                    NullPointerException npe = new NullPointerException("loader returned a null value");
-                    future.completeExceptionally(npe);
-                    throw new ExecutionException(npe);
-                } else {
-                    future.complete(new Entry<>(key, loaded, now));
+        BiFunction<? super Entry<K, V>, Throwable, ? extends V> handler = (ok, ex) -> {
+            if (ok != null) {
+                try (ReleasableLock ignored = lruLock.acquire()) {
+                    promote(ok, now);
                 }
+                return ok.value;
             } else {
-                completableValue = future.handle(handler);
+                try (ReleasableLock ignored = segment.writeLock.acquire()) {
+                    CompletableFuture<Entry<K, V>> sanity = segment.map.get(key);
+                    if (sanity != null && sanity.isCompletedExceptionally()) {
+                        segment.map.remove(key);
+                    }
+                }
+                return null;
             }
+        };
 
+        CompletableFuture<V> completableValue;
+        if (future == null) {
+            future = completableFuture;
+            completableValue = future.handle(handler);
+            V loaded;
             try {
-                value = completableValue.get();
-                // check to ensure the future hasn't been completed with an exception
-                if (future.isCompletedExceptionally()) {
-                    future.get(); // call get to force the exception to be thrown for other concurrent callers
-                    throw new IllegalStateException("the future was completed exceptionally but no exception was thrown");
-                }
-            } catch (InterruptedException e) {
-                throw new IllegalStateException(e);
+                loaded = loader.load(key);
+            } catch (Exception e) {
+                future.completeExceptionally(e);
+                throw new ExecutionException(e);
             }
+            if (loaded == null) {
+                NullPointerException npe = new NullPointerException("loader returned a null value");
+                future.completeExceptionally(npe);
+                throw new ExecutionException(npe);
+            } else {
+                future.complete(new Entry<>(key, loaded, now));
+            }
+        } else {
+            completableValue = future.handle(handler);
+        }
+        V value;
+        try {
+            value = completableValue.get();
+            // check to ensure the future hasn't been completed with an exception
+            if (future.isCompletedExceptionally()) {
+                future.get(); // call get to force the exception to be thrown for other concurrent callers
+                throw new IllegalStateException("the future was completed exceptionally but no exception was thrown");
+            }
+        } catch (InterruptedException e) {
+            throw new IllegalStateException(e);
         }
         return value;
     }
diff --git a/server/src/main/java/org/opensearch/common/cache/ICache.java b/server/src/main/java/org/opensearch/common/cache/ICache.java
new file mode 100644
index 0000000000000..c6ea5fca1a8fe
--- /dev/null
+++ b/server/src/main/java/org/opensearch/common/cache/ICache.java
@@ -0,0 +1,34 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.common.cache;
+
+/**
+ * Represents a cache interface.
+ * @param <K> Type of key.
+ * @param <V> Type of value.
+ *
+ * @opensearch.experimental
+ */
+public interface ICache<K, V> {
+    V get(K key);
+
+    void put(K key, V value);
+
+    V computeIfAbsent(K key, LoadAwareCacheLoader<K, V> loader) throws Exception;
+
+    void invalidate(K key);
+
+    void invalidateAll();
+
+    Iterable<K> keys();
+
+    long count();
+
+    void refresh();
+}
diff --git a/server/src/main/java/org/opensearch/common/cache/LoadAwareCacheLoader.java b/server/src/main/java/org/opensearch/common/cache/LoadAwareCacheLoader.java
new file mode 100644
index 0000000000000..57aa4aa39c782
--- /dev/null
+++ b/server/src/main/java/org/opensearch/common/cache/LoadAwareCacheLoader.java
@@ -0,0 +1,20 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.common.cache;
+
+/**
+ * Extends a cache loader with awareness of whether the data is loaded or not.
+ * @param <K> Type of key.
+ * @param <V> Type of value.
+ *
+ * @opensearch.internal
+ */
+public interface LoadAwareCacheLoader<K, V> extends CacheLoader<K, V> {
+    boolean isLoaded();
+}
diff --git a/server/src/main/java/org/opensearch/common/cache/store/OpenSearchOnHeapCache.java b/server/src/main/java/org/opensearch/common/cache/store/OpenSearchOnHeapCache.java
new file mode 100644
index 0000000000000..c497c8dbb7ea9
--- /dev/null
+++ b/server/src/main/java/org/opensearch/common/cache/store/OpenSearchOnHeapCache.java
@@ -0,0 +1,128 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.common.cache.store;
+
+import org.opensearch.common.cache.Cache;
+import org.opensearch.common.cache.CacheBuilder;
+import org.opensearch.common.cache.LoadAwareCacheLoader;
+import org.opensearch.common.cache.RemovalListener;
+import org.opensearch.common.cache.RemovalNotification;
+import org.opensearch.common.cache.store.builders.StoreAwareCacheBuilder;
+import org.opensearch.common.cache.store.enums.CacheStoreType;
+import org.opensearch.common.cache.store.listeners.StoreAwareCacheEventListener;
+
+/**
+ * This variant of on-heap cache uses OpenSearch custom cache implementation.
+ * @param <K> Type of key.
+ * @param <V> Type of value.
+ *
+ * @opensearch.experimental
+ */
+public class OpenSearchOnHeapCache<K, V> implements StoreAwareCache<K, V>, RemovalListener<K, V> {
+
+    private final Cache<K, V> cache;
+
+    private final StoreAwareCacheEventListener<K, V> eventListener;
+
+    public OpenSearchOnHeapCache(Builder<K, V> builder) {
+        CacheBuilder<K, V> cacheBuilder = CacheBuilder.<K, V>builder()
+            .setMaximumWeight(builder.getMaxWeightInBytes())
+            .weigher(builder.getWeigher())
+            .removalListener(this);
+        if (builder.getExpireAfterAcess() != null) {
+            cacheBuilder.setExpireAfterAccess(builder.getExpireAfterAcess());
+        }
+        cache = cacheBuilder.build();
+        this.eventListener = builder.getEventListener();
+    }
+
+    @Override
+    public V get(K key) {
+        V value = cache.get(key);
+        if (value != null) {
+            eventListener.onHit(key, value, CacheStoreType.ON_HEAP);
+        } else {
+            eventListener.onMiss(key, CacheStoreType.ON_HEAP);
+        }
+        return value;
+    }
+
+    @Override
+    public void put(K key, V value) {
+        cache.put(key, value);
+        eventListener.onCached(key, value, CacheStoreType.ON_HEAP);
+    }
+
+    @Override
+    public V computeIfAbsent(K key, LoadAwareCacheLoader<K, V> loader) throws Exception {
+        V value = cache.computeIfAbsent(key, key1 -> loader.load(key));
+        if (!loader.isLoaded()) {
+            eventListener.onHit(key, value, CacheStoreType.ON_HEAP);
+        } else {
+            eventListener.onMiss(key, CacheStoreType.ON_HEAP);
+            eventListener.onCached(key, value, CacheStoreType.ON_HEAP);
+        }
+        return value;
+    }
+
+    @Override
+    public void invalidate(K key) {
+        cache.invalidate(key);
+    }
+
+    @Override
+    public void invalidateAll() {
+        cache.invalidateAll();
+    }
+
+    @Override
+    public Iterable<K> keys() {
+        return cache.keys();
+    }
+
+    @Override
+    public long count() {
+        return cache.count();
+    }
+
+    @Override
+    public void refresh() {
+        cache.refresh();
+    }
+
+    @Override
+    public CacheStoreType getTierType() {
+        return CacheStoreType.ON_HEAP;
+    }
+
+    @Override
+    public void onRemoval(RemovalNotification<K, V> notification) {
+        eventListener.onRemoval(
+            new StoreAwareCacheRemovalNotification<>(
+                notification.getKey(),
+                notification.getValue(),
+                notification.getRemovalReason(),
+                CacheStoreType.ON_HEAP
+            )
+        );
+    }
+
+    /**
+     * Builder object
+     * @param <K> Type of key
+     * @param <V> Type of value
+     */
+    public static class Builder<K, V> extends StoreAwareCacheBuilder<K, V> {
+
+        @Override
+        public StoreAwareCache<K, V> build() {
+            return new OpenSearchOnHeapCache<K, V>(this);
+        }
+    }
+}
diff --git a/server/src/main/java/org/opensearch/common/cache/store/StoreAwareCache.java b/server/src/main/java/org/opensearch/common/cache/store/StoreAwareCache.java
new file mode 100644
index 0000000000000..45ca48d94c140
--- /dev/null
+++ b/server/src/main/java/org/opensearch/common/cache/store/StoreAwareCache.java
@@ -0,0 +1,23 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.common.cache.store;
+
+import org.opensearch.common.cache.ICache;
+import org.opensearch.common.cache.store.enums.CacheStoreType;
+
+/**
+ * Represents a cache with a specific type of store like onHeap, disk etc.
+ * @param <K> Type of key.
+ * @param <V> Type of value.
+ *
+ * @opensearch.experimental
+ */
+public interface StoreAwareCache<K, V> extends ICache<K, V> {
+    CacheStoreType getTierType();
+}
diff --git a/server/src/main/java/org/opensearch/common/cache/store/StoreAwareCacheRemovalNotification.java b/server/src/main/java/org/opensearch/common/cache/store/StoreAwareCacheRemovalNotification.java
new file mode 100644
index 0000000000000..492dbff3532a1
--- /dev/null
+++ b/server/src/main/java/org/opensearch/common/cache/store/StoreAwareCacheRemovalNotification.java
@@ -0,0 +1,33 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.common.cache.store;
+
+import org.opensearch.common.cache.RemovalNotification;
+import org.opensearch.common.cache.RemovalReason;
+import org.opensearch.common.cache.store.enums.CacheStoreType;
+
+/**
+ * Removal notification for store aware cache.
+ * @param <K> Type of key.
+ * @param <V> Type of value.
+ *
+ * @opensearch.internal
+ */
+public class StoreAwareCacheRemovalNotification<K, V> extends RemovalNotification<K, V> {
+    private final CacheStoreType cacheStoreType;
+
+    public StoreAwareCacheRemovalNotification(K key, V value, RemovalReason removalReason, CacheStoreType cacheStoreType) {
+        super(key, value, removalReason);
+        this.cacheStoreType = cacheStoreType;
+    }
+
+    public CacheStoreType getCacheStoreType() {
+        return cacheStoreType;
+    }
+}
diff --git a/server/src/main/java/org/opensearch/common/cache/store/StoreAwareCacheValue.java b/server/src/main/java/org/opensearch/common/cache/store/StoreAwareCacheValue.java
new file mode 100644
index 0000000000000..4fbbbbfebfaa7
--- /dev/null
+++ b/server/src/main/java/org/opensearch/common/cache/store/StoreAwareCacheValue.java
@@ -0,0 +1,35 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.common.cache.store;
+
+import org.opensearch.common.cache.store.enums.CacheStoreType;
+
+/**
+ * Represents a store aware cache value.
+ * @param <V> Type of value.
+ *
+ * @opensearch.internal
+ */
+public class StoreAwareCacheValue<V> {
+    private final V value;
+    private final CacheStoreType source;
+
+    public StoreAwareCacheValue(V value, CacheStoreType source) {
+        this.value = value;
+        this.source = source;
+    }
+
+    public V getValue() {
+        return value;
+    }
+
+    public CacheStoreType getCacheStoreType() {
+        return source;
+    }
+}
diff --git a/server/src/main/java/org/opensearch/common/cache/store/builders/StoreAwareCacheBuilder.java b/server/src/main/java/org/opensearch/common/cache/store/builders/StoreAwareCacheBuilder.java
new file mode 100644
index 0000000000000..fc5aa48aae90f
--- /dev/null
+++ b/server/src/main/java/org/opensearch/common/cache/store/builders/StoreAwareCacheBuilder.java
@@ -0,0 +1,73 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.common.cache.store.builders;
+
+import org.opensearch.common.cache.store.StoreAwareCache;
+import org.opensearch.common.cache.store.listeners.StoreAwareCacheEventListener;
+import org.opensearch.common.unit.TimeValue;
+
+import java.util.function.ToLongBiFunction;
+
+/**
+ * Builder for store aware cache.
+ * @param <K> Type of key.
+ * @param <V> Type of value.
+ *
+ * @opensearch.internal
+ */
+public abstract class StoreAwareCacheBuilder<K, V> {
+
+    private long maxWeightInBytes;
+
+    private ToLongBiFunction<K, V> weigher;
+
+    private TimeValue expireAfterAcess;
+
+    private StoreAwareCacheEventListener<K, V> eventListener;
+
+    public StoreAwareCacheBuilder() {}
+
+    public StoreAwareCacheBuilder<K, V> setMaximumWeightInBytes(long sizeInBytes) {
+        this.maxWeightInBytes = sizeInBytes;
+        return this;
+    }
+
+    public StoreAwareCacheBuilder<K, V> setWeigher(ToLongBiFunction<K, V> weigher) {
+        this.weigher = weigher;
+        return this;
+    }
+
+    public StoreAwareCacheBuilder<K, V> setExpireAfterAccess(TimeValue expireAfterAcess) {
+        this.expireAfterAcess = expireAfterAcess;
+        return this;
+    }
+
+    public StoreAwareCacheBuilder<K, V> setEventListener(StoreAwareCacheEventListener<K, V> eventListener) {
+        this.eventListener = eventListener;
+        return this;
+    }
+
+    public long getMaxWeightInBytes() {
+        return maxWeightInBytes;
+    }
+
+    public TimeValue getExpireAfterAcess() {
+        return expireAfterAcess;
+    }
+
+    public ToLongBiFunction<K, V> getWeigher() {
+        return weigher;
+    }
+
+    public StoreAwareCacheEventListener<K, V> getEventListener() {
+        return eventListener;
+    }
+
+    public abstract StoreAwareCache<K, V> build();
+}
diff --git a/server/src/main/java/org/opensearch/common/cache/store/builders/package-info.java b/server/src/main/java/org/opensearch/common/cache/store/builders/package-info.java
new file mode 100644
index 0000000000000..ac4590ae3bff7
--- /dev/null
+++ b/server/src/main/java/org/opensearch/common/cache/store/builders/package-info.java
@@ -0,0 +1,12 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+/**
+ * Base package for builders.
+ */
+package org.opensearch.common.cache.store.builders;
diff --git a/server/src/main/java/org/opensearch/common/cache/store/enums/CacheStoreType.java b/server/src/main/java/org/opensearch/common/cache/store/enums/CacheStoreType.java
new file mode 100644
index 0000000000000..04c0825787b66
--- /dev/null
+++ b/server/src/main/java/org/opensearch/common/cache/store/enums/CacheStoreType.java
@@ -0,0 +1,20 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.common.cache.store.enums;
+
+/**
+ * Cache store types in tiered cache.
+ *
+ * @opensearch.internal
+ */
+public enum CacheStoreType {
+
+    ON_HEAP,
+    DISK;
+}
diff --git a/server/src/main/java/org/opensearch/common/cache/store/enums/package-info.java b/server/src/main/java/org/opensearch/common/cache/store/enums/package-info.java
new file mode 100644
index 0000000000000..7a4e0fa7201fd
--- /dev/null
+++ b/server/src/main/java/org/opensearch/common/cache/store/enums/package-info.java
@@ -0,0 +1,10 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+/** Package related to tiered cache enums */
+package org.opensearch.common.cache.store.enums;
diff --git a/server/src/main/java/org/opensearch/common/cache/store/listeners/StoreAwareCacheEventListener.java b/server/src/main/java/org/opensearch/common/cache/store/listeners/StoreAwareCacheEventListener.java
new file mode 100644
index 0000000000000..6d7e4b39aaf9f
--- /dev/null
+++ b/server/src/main/java/org/opensearch/common/cache/store/listeners/StoreAwareCacheEventListener.java
@@ -0,0 +1,30 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.common.cache.store.listeners;
+
+import org.opensearch.common.cache.store.StoreAwareCacheRemovalNotification;
+import org.opensearch.common.cache.store.enums.CacheStoreType;
+
+/**
+ * This can be used to listen to tiered caching events
+ * @param <K> Type of key
+ * @param <V> Type of value
+ *
+ * @opensearch.internal
+ */
+public interface StoreAwareCacheEventListener<K, V> {
+
+    void onMiss(K key, CacheStoreType cacheStoreType);
+
+    void onRemoval(StoreAwareCacheRemovalNotification<K, V> notification);
+
+    void onHit(K key, V value, CacheStoreType cacheStoreType);
+
+    void onCached(K key, V value, CacheStoreType cacheStoreType);
+}
diff --git a/server/src/main/java/org/opensearch/common/cache/store/listeners/package-info.java b/server/src/main/java/org/opensearch/common/cache/store/listeners/package-info.java
new file mode 100644
index 0000000000000..c3222ca3ffb62
--- /dev/null
+++ b/server/src/main/java/org/opensearch/common/cache/store/listeners/package-info.java
@@ -0,0 +1,10 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+/** Package related to tiered cache listeners */
+package org.opensearch.common.cache.store.listeners;
diff --git a/server/src/main/java/org/opensearch/common/cache/store/package-info.java b/server/src/main/java/org/opensearch/common/cache/store/package-info.java
new file mode 100644
index 0000000000000..edc1ecd7d5e7a
--- /dev/null
+++ b/server/src/main/java/org/opensearch/common/cache/store/package-info.java
@@ -0,0 +1,10 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+/** Base package for store aware caches. */
+package org.opensearch.common.cache.store;
diff --git a/server/src/main/java/org/opensearch/common/cache/tier/TieredSpilloverCache.java b/server/src/main/java/org/opensearch/common/cache/tier/TieredSpilloverCache.java
new file mode 100644
index 0000000000000..8b432c9484aed
--- /dev/null
+++ b/server/src/main/java/org/opensearch/common/cache/tier/TieredSpilloverCache.java
@@ -0,0 +1,268 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.common.cache.tier;
+
+import org.opensearch.common.cache.ICache;
+import org.opensearch.common.cache.LoadAwareCacheLoader;
+import org.opensearch.common.cache.RemovalReason;
+import org.opensearch.common.cache.store.StoreAwareCache;
+import org.opensearch.common.cache.store.StoreAwareCacheRemovalNotification;
+import org.opensearch.common.cache.store.StoreAwareCacheValue;
+import org.opensearch.common.cache.store.builders.StoreAwareCacheBuilder;
+import org.opensearch.common.cache.store.enums.CacheStoreType;
+import org.opensearch.common.cache.store.listeners.StoreAwareCacheEventListener;
+import org.opensearch.common.util.concurrent.ReleasableLock;
+import org.opensearch.common.util.iterable.Iterables;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.concurrent.locks.ReadWriteLock;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+import java.util.function.Function;
+
+/**
+ * This cache spillover the evicted items from heap tier to disk tier. All the new items are first cached on heap
+ * and the items evicted from on heap cache are moved to disk based cache. If disk based cache also gets full,
+ * then items are eventually evicted from it and removed which will result in cache miss.
+ *
+ * @param <K> Type of key
+ * @param <V> Type of value
+ *
+ * @opensearch.experimental
+ */
+public class TieredSpilloverCache<K, V> implements ICache<K, V>, StoreAwareCacheEventListener<K, V> {
+
+    // TODO: Remove optional when diskCache implementation is integrated.
+    private final Optional<StoreAwareCache<K, V>> onDiskCache;
+    private final StoreAwareCache<K, V> onHeapCache;
+    private final StoreAwareCacheEventListener<K, V> listener;
+    ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
+    ReleasableLock readLock = new ReleasableLock(readWriteLock.readLock());
+    ReleasableLock writeLock = new ReleasableLock(readWriteLock.writeLock());
+
+    /**
+     * Maintains caching tiers in ascending order of cache latency.
+     */
+    private final List<StoreAwareCache<K, V>> cacheList;
+
+    TieredSpilloverCache(Builder<K, V> builder) {
+        Objects.requireNonNull(builder.onHeapCacheBuilder, "onHeap cache builder can't be null");
+        this.onHeapCache = builder.onHeapCacheBuilder.setEventListener(this).build();
+        if (builder.onDiskCacheBuilder != null) {
+            this.onDiskCache = Optional.of(builder.onDiskCacheBuilder.setEventListener(this).build());
+        } else {
+            this.onDiskCache = Optional.empty();
+        }
+        this.listener = builder.listener;
+        this.cacheList = this.onDiskCache.map(diskTier -> Arrays.asList(this.onHeapCache, diskTier)).orElse(List.of(this.onHeapCache));
+    }
+
+    // Package private for testing
+    StoreAwareCache<K, V> getOnHeapCache() {
+        return onHeapCache;
+    }
+
+    // Package private for testing
+    Optional<StoreAwareCache<K, V>> getOnDiskCache() {
+        return onDiskCache;
+    }
+
+    @Override
+    public V get(K key) {
+        StoreAwareCacheValue<V> cacheValue = getValueFromTieredCache(true).apply(key);
+        if (cacheValue == null) {
+            return null;
+        }
+        return cacheValue.getValue();
+    }
+
+    @Override
+    public void put(K key, V value) {
+        try (ReleasableLock ignore = writeLock.acquire()) {
+            onHeapCache.put(key, value);
+            listener.onCached(key, value, CacheStoreType.ON_HEAP);
+        }
+    }
+
+    @Override
+    public V computeIfAbsent(K key, LoadAwareCacheLoader<K, V> loader) throws Exception {
+        // We are skipping calling event listeners at this step as we do another get inside below computeIfAbsent.
+        // Where we might end up calling onMiss twice for a key not present in onHeap cache.
+        // Similary we might end up calling both onMiss and onHit for a key, in case we are receiving concurrent
+        // requests for the same key which requires loading only once.
+        StoreAwareCacheValue<V> cacheValue = getValueFromTieredCache(false).apply(key);
+        if (cacheValue == null) {
+            // Add the value to the onHeap cache. We are calling computeIfAbsent which does another get inside.
+            // This is needed as there can be many requests for the same key at the same time and we only want to load
+            // the value once.
+            V value = null;
+            try (ReleasableLock ignore = writeLock.acquire()) {
+                value = onHeapCache.computeIfAbsent(key, loader);
+            }
+            if (loader.isLoaded()) {
+                listener.onMiss(key, CacheStoreType.ON_HEAP);
+                onDiskCache.ifPresent(diskTier -> listener.onMiss(key, CacheStoreType.DISK));
+                listener.onCached(key, value, CacheStoreType.ON_HEAP);
+            } else {
+                listener.onHit(key, value, CacheStoreType.ON_HEAP);
+            }
+            return value;
+        }
+        listener.onHit(key, cacheValue.getValue(), cacheValue.getCacheStoreType());
+        if (cacheValue.getCacheStoreType().equals(CacheStoreType.DISK)) {
+            listener.onMiss(key, CacheStoreType.ON_HEAP);
+        }
+        return cacheValue.getValue();
+    }
+
+    @Override
+    public void invalidate(K key) {
+        // We are trying to invalidate the key from all caches though it would be present in only of them.
+        // Doing this as we don't know where it is located. We could do a get from both and check that, but what will
+        // also trigger a hit/miss listener event, so ignoring it for now.
+        try (ReleasableLock ignore = writeLock.acquire()) {
+            for (StoreAwareCache<K, V> storeAwareCache : cacheList) {
+                storeAwareCache.invalidate(key);
+            }
+        }
+    }
+
+    @Override
+    public void invalidateAll() {
+        try (ReleasableLock ignore = writeLock.acquire()) {
+            for (StoreAwareCache<K, V> storeAwareCache : cacheList) {
+                storeAwareCache.invalidateAll();
+            }
+        }
+    }
+
+    /**
+     * Provides an iteration over both onHeap and disk keys. This is not protected from any mutations to the cache.
+     * @return An iterable over (onHeap + disk) keys
+     */
+    @Override
+    public Iterable<K> keys() {
+        Iterable<K> onDiskKeysIterable;
+        if (onDiskCache.isPresent()) {
+            onDiskKeysIterable = onDiskCache.get().keys();
+        } else {
+            onDiskKeysIterable = Collections::emptyIterator;
+        }
+        return Iterables.concat(onHeapCache.keys(), onDiskKeysIterable);
+    }
+
+    @Override
+    public long count() {
+        long totalCount = 0;
+        for (StoreAwareCache<K, V> storeAwareCache : cacheList) {
+            totalCount += storeAwareCache.count();
+        }
+        return totalCount;
+    }
+
+    @Override
+    public void refresh() {
+        try (ReleasableLock ignore = writeLock.acquire()) {
+            for (StoreAwareCache<K, V> storeAwareCache : cacheList) {
+                storeAwareCache.refresh();
+            }
+        }
+    }
+
+    @Override
+    public void onMiss(K key, CacheStoreType cacheStoreType) {
+        // Misses for tiered cache are tracked here itself.
+    }
+
+    @Override
+    public void onRemoval(StoreAwareCacheRemovalNotification<K, V> notification) {
+        if (RemovalReason.EVICTED.equals(notification.getRemovalReason())
+            || RemovalReason.CAPACITY.equals(notification.getRemovalReason())) {
+            switch (notification.getCacheStoreType()) {
+                case ON_HEAP:
+                    try (ReleasableLock ignore = writeLock.acquire()) {
+                        onDiskCache.ifPresent(diskTier -> { diskTier.put(notification.getKey(), notification.getValue()); });
+                    }
+                    onDiskCache.ifPresent(
+                        diskTier -> listener.onCached(notification.getKey(), notification.getValue(), CacheStoreType.DISK)
+                    );
+                    break;
+                default:
+                    break;
+            }
+        }
+        listener.onRemoval(notification);
+    }
+
+    @Override
+    public void onHit(K key, V value, CacheStoreType cacheStoreType) {
+        // Hits for tiered cache are tracked here itself.
+    }
+
+    @Override
+    public void onCached(K key, V value, CacheStoreType cacheStoreType) {
+        // onCached events for tiered cache are tracked here itself.
+    }
+
+    private Function<K, StoreAwareCacheValue<V>> getValueFromTieredCache(boolean triggerEventListener) {
+        return key -> {
+            try (ReleasableLock ignore = readLock.acquire()) {
+                for (StoreAwareCache<K, V> storeAwareCache : cacheList) {
+                    V value = storeAwareCache.get(key);
+                    if (value != null) {
+                        if (triggerEventListener) {
+                            listener.onHit(key, value, storeAwareCache.getTierType());
+                        }
+                        return new StoreAwareCacheValue<>(value, storeAwareCache.getTierType());
+                    } else {
+                        if (triggerEventListener) {
+                            listener.onMiss(key, storeAwareCache.getTierType());
+                        }
+                    }
+                }
+            }
+            return null;
+        };
+    }
+
+    /**
+     * Builder object for tiered spillover cache.
+     * @param <K> Type of key
+     * @param <V> Type of value
+     */
+    public static class Builder<K, V> {
+        private StoreAwareCacheBuilder<K, V> onHeapCacheBuilder;
+        private StoreAwareCacheBuilder<K, V> onDiskCacheBuilder;
+        private StoreAwareCacheEventListener<K, V> listener;
+
+        public Builder() {}
+
+        public Builder<K, V> setOnHeapCacheBuilder(StoreAwareCacheBuilder<K, V> onHeapCacheBuilder) {
+            this.onHeapCacheBuilder = onHeapCacheBuilder;
+            return this;
+        }
+
+        public Builder<K, V> setOnDiskCacheBuilder(StoreAwareCacheBuilder<K, V> onDiskCacheBuilder) {
+            this.onDiskCacheBuilder = onDiskCacheBuilder;
+            return this;
+        }
+
+        public Builder<K, V> setListener(StoreAwareCacheEventListener<K, V> listener) {
+            this.listener = listener;
+            return this;
+        }
+
+        public TieredSpilloverCache<K, V> build() {
+            return new TieredSpilloverCache<>(this);
+        }
+    }
+}
diff --git a/server/src/main/java/org/opensearch/common/cache/tier/package-info.java b/server/src/main/java/org/opensearch/common/cache/tier/package-info.java
new file mode 100644
index 0000000000000..7ad81dbe3073c
--- /dev/null
+++ b/server/src/main/java/org/opensearch/common/cache/tier/package-info.java
@@ -0,0 +1,10 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+/** Base package for cache tier support. */
+package org.opensearch.common.cache.tier;
diff --git a/server/src/main/java/org/opensearch/common/lucene/Lucene.java b/server/src/main/java/org/opensearch/common/lucene/Lucene.java
index 5b521081ac63b..2c7b6b552b43f 100644
--- a/server/src/main/java/org/opensearch/common/lucene/Lucene.java
+++ b/server/src/main/java/org/opensearch/common/lucene/Lucene.java
@@ -110,7 +110,7 @@
  * @opensearch.internal
  */
 public class Lucene {
-    public static final String LATEST_CODEC = "Lucene95";
+    public static final String LATEST_CODEC = "Lucene99";
 
     public static final String SOFT_DELETES_FIELD = "__soft_deletes";
 
diff --git a/server/src/main/java/org/opensearch/common/util/concurrent/ThreadContext.java b/server/src/main/java/org/opensearch/common/util/concurrent/ThreadContext.java
index 3da21a6777456..6580b0e0085ef 100644
--- a/server/src/main/java/org/opensearch/common/util/concurrent/ThreadContext.java
+++ b/server/src/main/java/org/opensearch/common/util/concurrent/ThreadContext.java
@@ -161,7 +161,7 @@ public StoredContext stashContext() {
             );
         }
 
-        final Map<String, Object> transientHeaders = propagateTransients(context.transientHeaders);
+        final Map<String, Object> transientHeaders = propagateTransients(context.transientHeaders, context.isSystemContext);
         if (!transientHeaders.isEmpty()) {
             threadContextStruct = threadContextStruct.putTransient(transientHeaders);
         }
@@ -182,7 +182,7 @@ public StoredContext stashContext() {
     public Writeable captureAsWriteable() {
         final ThreadContextStruct context = threadLocal.get();
         return out -> {
-            final Map<String, String> propagatedHeaders = propagateHeaders(context.transientHeaders);
+            final Map<String, String> propagatedHeaders = propagateHeaders(context.transientHeaders, context.isSystemContext);
             context.writeTo(out, defaultHeader, propagatedHeaders);
         };
     }
@@ -245,7 +245,7 @@ public StoredContext newStoredContext(boolean preserveResponseHeaders, Collectio
         final Map<String, Object> newTransientHeaders = new HashMap<>(originalContext.transientHeaders);
 
         boolean transientHeadersModified = false;
-        final Map<String, Object> transientHeaders = propagateTransients(originalContext.transientHeaders);
+        final Map<String, Object> transientHeaders = propagateTransients(originalContext.transientHeaders, originalContext.isSystemContext);
         if (!transientHeaders.isEmpty()) {
             newTransientHeaders.putAll(transientHeaders);
             transientHeadersModified = true;
@@ -322,7 +322,7 @@ public Supplier<StoredContext> wrapRestorable(StoredContext storedContext) {
     @Override
     public void writeTo(StreamOutput out) throws IOException {
         final ThreadContextStruct context = threadLocal.get();
-        final Map<String, String> propagatedHeaders = propagateHeaders(context.transientHeaders);
+        final Map<String, String> propagatedHeaders = propagateHeaders(context.transientHeaders, context.isSystemContext);
         context.writeTo(out, defaultHeader, propagatedHeaders);
     }
 
@@ -534,7 +534,7 @@ boolean isDefaultContext() {
      * by the system itself rather than by a user action.
      */
     public void markAsSystemContext() {
-        threadLocal.set(threadLocal.get().setSystemContext());
+        threadLocal.set(threadLocal.get().setSystemContext(propagators));
     }
 
     /**
@@ -573,15 +573,15 @@ public static Map<String, String> buildDefaultHeaders(Settings settings) {
         }
     }
 
-    private Map<String, Object> propagateTransients(Map<String, Object> source) {
+    private Map<String, Object> propagateTransients(Map<String, Object> source, boolean isSystemContext) {
         final Map<String, Object> transients = new HashMap<>();
-        propagators.forEach(p -> transients.putAll(p.transients(source)));
+        propagators.forEach(p -> transients.putAll(p.transients(source, isSystemContext)));
         return transients;
     }
 
-    private Map<String, String> propagateHeaders(Map<String, Object> source) {
+    private Map<String, String> propagateHeaders(Map<String, Object> source, boolean isSystemContext) {
         final Map<String, String> headers = new HashMap<>();
-        propagators.forEach(p -> headers.putAll(p.headers(source)));
+        propagators.forEach(p -> headers.putAll(p.headers(source, isSystemContext)));
         return headers;
     }
 
@@ -603,11 +603,13 @@ private static final class ThreadContextStruct {
         // saving current warning headers' size not to recalculate the size with every new warning header
         private final long warningHeadersSize;
 
-        private ThreadContextStruct setSystemContext() {
+        private ThreadContextStruct setSystemContext(final List<ThreadContextStatePropagator> propagators) {
             if (isSystemContext) {
                 return this;
             }
-            return new ThreadContextStruct(requestHeaders, responseHeaders, transientHeaders, persistentHeaders, true);
+            final Map<String, Object> transients = new HashMap<>();
+            propagators.forEach(p -> transients.putAll(p.transients(transientHeaders, true)));
+            return new ThreadContextStruct(requestHeaders, responseHeaders, transients, persistentHeaders, true);
         }
 
         private ThreadContextStruct(
diff --git a/server/src/main/java/org/opensearch/common/util/concurrent/ThreadContextStatePropagator.java b/server/src/main/java/org/opensearch/common/util/concurrent/ThreadContextStatePropagator.java
index dac70b0e8124e..e8c12ae13d5eb 100644
--- a/server/src/main/java/org/opensearch/common/util/concurrent/ThreadContextStatePropagator.java
+++ b/server/src/main/java/org/opensearch/common/util/concurrent/ThreadContextStatePropagator.java
@@ -22,15 +22,41 @@
 public interface ThreadContextStatePropagator {
     /**
      * Returns the list of transient headers that needs to be propagated from current context to new thread context.
-     * @param source current context transient headers
+     *
+     * @param source          current context transient headers
      * @return the list of transient headers that needs to be propagated from current context to new thread context
      */
+    @Deprecated(since = "2.12.0", forRemoval = true)
     Map<String, Object> transients(Map<String, Object> source);
 
+    /**
+     * Returns the list of transient headers that needs to be propagated from current context to new thread context.
+     *
+     * @param source          current context transient headers
+     * @param isSystemContext if the propagation is for system context.
+     * @return the list of transient headers that needs to be propagated from current context to new thread context
+     */
+    default Map<String, Object> transients(Map<String, Object> source, boolean isSystemContext) {
+        return transients(source);
+    };
+
     /**
      * Returns the list of request headers that needs to be propagated from current context to request.
-     * @param source current context headers
+     *
+     * @param source          current context headers
      * @return the list of request headers that needs to be propagated from current context to request
      */
+    @Deprecated(since = "2.12.0", forRemoval = true)
     Map<String, String> headers(Map<String, Object> source);
+
+    /**
+     * Returns the list of request headers that needs to be propagated from current context to request.
+     *
+     * @param source          current context headers
+     * @param isSystemContext if the propagation is for system context.
+     * @return the list of request headers that needs to be propagated from current context to request
+     */
+    default Map<String, String> headers(Map<String, Object> source, boolean isSystemContext) {
+        return headers(source);
+    }
 }
diff --git a/server/src/main/java/org/opensearch/index/IndexModule.java b/server/src/main/java/org/opensearch/index/IndexModule.java
index 545623287bae8..6ac10a221d49e 100644
--- a/server/src/main/java/org/opensearch/index/IndexModule.java
+++ b/server/src/main/java/org/opensearch/index/IndexModule.java
@@ -161,7 +161,7 @@ public final class IndexModule {
 
     /** Which lucene file extensions to load with the mmap directory when using hybridfs store. This settings is ignored if {@link #INDEX_STORE_HYBRID_NIO_EXTENSIONS} is set.
      *  This is an expert setting.
-     *  @see <a href="https://lucene.apache.org/core/9_5_0/core/org/apache/lucene/codecs/lucene95/package-summary.html#file-names">Lucene File Extensions</a>.
+     *  @see <a href="https://lucene.apache.org/core/9_9_0/core/org/apache/lucene/codecs/lucene99/package-summary.html#file-names">Lucene File Extensions</a>.
      *
      * @deprecated This setting will be removed in OpenSearch 3.x. Use {@link #INDEX_STORE_HYBRID_NIO_EXTENSIONS} instead.
      */
@@ -206,7 +206,7 @@ public Iterator<Setting<?>> settings() {
 
     /** Which lucene file extensions to load with nio. All others will default to mmap. Takes precedence over {@link #INDEX_STORE_HYBRID_MMAP_EXTENSIONS}.
      *  This is an expert setting.
-     *  @see <a href="https://lucene.apache.org/core/9_5_0/core/org/apache/lucene/codecs/lucene95/package-summary.html#file-names">Lucene File Extensions</a>.
+     *  @see <a href="https://lucene.apache.org/core/9_9_0/core/org/apache/lucene/codecs/lucene99/package-summary.html#file-names">Lucene File Extensions</a>.
      */
     public static final Setting<List<String>> INDEX_STORE_HYBRID_NIO_EXTENSIONS = Setting.listSetting(
         "index.store.hybrid.nio.extensions",
diff --git a/server/src/main/java/org/opensearch/index/codec/CodecService.java b/server/src/main/java/org/opensearch/index/codec/CodecService.java
index 775fc88b504f5..67f38536a0d11 100644
--- a/server/src/main/java/org/opensearch/index/codec/CodecService.java
+++ b/server/src/main/java/org/opensearch/index/codec/CodecService.java
@@ -34,8 +34,8 @@
 
 import org.apache.logging.log4j.Logger;
 import org.apache.lucene.codecs.Codec;
-import org.apache.lucene.codecs.lucene95.Lucene95Codec;
-import org.apache.lucene.codecs.lucene95.Lucene95Codec.Mode;
+import org.apache.lucene.codecs.lucene99.Lucene99Codec;
+import org.apache.lucene.codecs.lucene99.Lucene99Codec.Mode;
 import org.opensearch.common.Nullable;
 import org.opensearch.common.collect.MapBuilder;
 import org.opensearch.index.IndexSettings;
@@ -68,10 +68,10 @@ public CodecService(@Nullable MapperService mapperService, IndexSettings indexSe
         final MapBuilder<String, Codec> codecs = MapBuilder.<String, Codec>newMapBuilder();
         assert null != indexSettings;
         if (mapperService == null) {
-            codecs.put(DEFAULT_CODEC, new Lucene95Codec());
-            codecs.put(LZ4, new Lucene95Codec());
-            codecs.put(BEST_COMPRESSION_CODEC, new Lucene95Codec(Mode.BEST_COMPRESSION));
-            codecs.put(ZLIB, new Lucene95Codec(Mode.BEST_COMPRESSION));
+            codecs.put(DEFAULT_CODEC, new Lucene99Codec());
+            codecs.put(LZ4, new Lucene99Codec());
+            codecs.put(BEST_COMPRESSION_CODEC, new Lucene99Codec(Mode.BEST_COMPRESSION));
+            codecs.put(ZLIB, new Lucene99Codec(Mode.BEST_COMPRESSION));
         } else {
             codecs.put(DEFAULT_CODEC, new PerFieldMappingPostingFormatCodec(Mode.BEST_SPEED, mapperService, logger));
             codecs.put(LZ4, new PerFieldMappingPostingFormatCodec(Mode.BEST_SPEED, mapperService, logger));
diff --git a/server/src/main/java/org/opensearch/index/codec/PerFieldMappingPostingFormatCodec.java b/server/src/main/java/org/opensearch/index/codec/PerFieldMappingPostingFormatCodec.java
index d3207557273a5..dc28ad2d6dc07 100644
--- a/server/src/main/java/org/opensearch/index/codec/PerFieldMappingPostingFormatCodec.java
+++ b/server/src/main/java/org/opensearch/index/codec/PerFieldMappingPostingFormatCodec.java
@@ -37,7 +37,7 @@
 import org.apache.lucene.codecs.DocValuesFormat;
 import org.apache.lucene.codecs.PostingsFormat;
 import org.apache.lucene.codecs.lucene90.Lucene90DocValuesFormat;
-import org.apache.lucene.codecs.lucene95.Lucene95Codec;
+import org.apache.lucene.codecs.lucene99.Lucene99Codec;
 import org.opensearch.common.lucene.Lucene;
 import org.opensearch.index.mapper.CompletionFieldMapper;
 import org.opensearch.index.mapper.MappedFieldType;
@@ -53,7 +53,7 @@
  *
  * @opensearch.internal
  */
-public class PerFieldMappingPostingFormatCodec extends Lucene95Codec {
+public class PerFieldMappingPostingFormatCodec extends Lucene99Codec {
     private final Logger logger;
     private final MapperService mapperService;
     private final DocValuesFormat dvFormat = new Lucene90DocValuesFormat();
diff --git a/server/src/main/java/org/opensearch/index/fielddata/IndexFieldData.java b/server/src/main/java/org/opensearch/index/fielddata/IndexFieldData.java
index 6a79679cc2f09..a63e1d418e3ba 100644
--- a/server/src/main/java/org/opensearch/index/fielddata/IndexFieldData.java
+++ b/server/src/main/java/org/opensearch/index/fielddata/IndexFieldData.java
@@ -38,6 +38,7 @@
 import org.apache.lucene.search.DocIdSetIterator;
 import org.apache.lucene.search.FieldComparatorSource;
 import org.apache.lucene.search.IndexSearcher;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.Query;
 import org.apache.lucene.search.ScoreMode;
 import org.apache.lucene.search.Scorer;
@@ -150,6 +151,13 @@ public void disableSkipping() {
             this.enableSkipping = false;
         }
 
+        protected Pruning filterPruning(Pruning pruning) {
+            if (this.enableSkipping) {
+                return pruning;
+            }
+            return Pruning.NONE;
+        }
+
         /**
          * Simple wrapper class around a filter that matches parent documents
          * and a filter that matches child documents. For every root document R,
diff --git a/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/BytesRefFieldComparatorSource.java b/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/BytesRefFieldComparatorSource.java
index 3aa4d9cb782ca..4c6eba2f0c7ec 100644
--- a/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/BytesRefFieldComparatorSource.java
+++ b/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/BytesRefFieldComparatorSource.java
@@ -38,6 +38,7 @@
 import org.apache.lucene.index.SortedSetDocValues;
 import org.apache.lucene.search.DocIdSetIterator;
 import org.apache.lucene.search.FieldComparator;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.Scorable;
 import org.apache.lucene.search.SortField;
 import org.apache.lucene.search.comparators.TermOrdValComparator;
@@ -94,7 +95,7 @@ protected SortedBinaryDocValues getValues(LeafReaderContext context) throws IOEx
     protected void setScorer(Scorable scorer, LeafReaderContext context) {}
 
     @Override
-    public FieldComparator<?> newComparator(String fieldname, int numHits, boolean enableSkipping, boolean reversed) {
+    public FieldComparator<?> newComparator(String fieldname, int numHits, Pruning pruning, boolean reversed) {
         assert indexFieldData == null || fieldname.equals(indexFieldData.getFieldName());
 
         final boolean sortMissingLast = sortMissingLast(missingValue) ^ reversed;
@@ -105,7 +106,7 @@ public FieldComparator<?> newComparator(String fieldname, int numHits, boolean e
                 indexFieldData.getFieldName(),
                 sortMissingLast,
                 reversed,
-                enableSkipping
+                filterPruning(pruning)
             ) {
 
                 @Override
diff --git a/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/DoubleValuesComparatorSource.java b/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/DoubleValuesComparatorSource.java
index 4f9f05addc8c7..fd4fac3877f2f 100644
--- a/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/DoubleValuesComparatorSource.java
+++ b/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/DoubleValuesComparatorSource.java
@@ -37,6 +37,7 @@
 import org.apache.lucene.search.DocIdSetIterator;
 import org.apache.lucene.search.FieldComparator;
 import org.apache.lucene.search.LeafFieldComparator;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.Scorable;
 import org.apache.lucene.search.SortField;
 import org.apache.lucene.search.comparators.DoubleComparator;
@@ -98,11 +99,11 @@ private NumericDoubleValues getNumericDocValues(LeafReaderContext context, doubl
     protected void setScorer(Scorable scorer, LeafReaderContext context) {}
 
     @Override
-    public FieldComparator<?> newComparator(String fieldname, int numHits, boolean enableSkipping, boolean reversed) {
+    public FieldComparator<?> newComparator(String fieldname, int numHits, Pruning pruning, boolean reversed) {
         assert indexFieldData == null || fieldname.equals(indexFieldData.getFieldName());
 
         final double dMissingValue = (Double) missingObject(missingValue, reversed);
-        return new DoubleComparator(numHits, fieldname, dMissingValue, reversed, enableSkipping && this.enableSkipping) {
+        return new DoubleComparator(numHits, fieldname, dMissingValue, reversed, filterPruning(pruning)) {
             @Override
             public LeafFieldComparator getLeafComparator(LeafReaderContext context) throws IOException {
                 return new DoubleLeafComparator(context) {
diff --git a/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/FloatValuesComparatorSource.java b/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/FloatValuesComparatorSource.java
index 3fb8b5c6ce393..b106ba268bcb9 100644
--- a/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/FloatValuesComparatorSource.java
+++ b/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/FloatValuesComparatorSource.java
@@ -36,6 +36,7 @@
 import org.apache.lucene.search.DocIdSetIterator;
 import org.apache.lucene.search.FieldComparator;
 import org.apache.lucene.search.LeafFieldComparator;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.Scorable;
 import org.apache.lucene.search.SortField;
 import org.apache.lucene.search.comparators.FloatComparator;
@@ -91,11 +92,11 @@ private NumericDoubleValues getNumericDocValues(LeafReaderContext context, float
     }
 
     @Override
-    public FieldComparator<?> newComparator(String fieldname, int numHits, boolean enableSkipping, boolean reversed) {
+    public FieldComparator<?> newComparator(String fieldname, int numHits, Pruning pruning, boolean reversed) {
         assert indexFieldData == null || fieldname.equals(indexFieldData.getFieldName());
 
         final float fMissingValue = (Float) missingObject(missingValue, reversed);
-        return new FloatComparator(numHits, fieldname, fMissingValue, reversed, enableSkipping && this.enableSkipping) {
+        return new FloatComparator(numHits, fieldname, fMissingValue, reversed, filterPruning(pruning)) {
             @Override
             public LeafFieldComparator getLeafComparator(LeafReaderContext context) throws IOException {
                 return new FloatLeafComparator(context) {
diff --git a/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/HalfFloatValuesComparatorSource.java b/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/HalfFloatValuesComparatorSource.java
index e0227083f4181..e2e56dcb14fdf 100644
--- a/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/HalfFloatValuesComparatorSource.java
+++ b/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/HalfFloatValuesComparatorSource.java
@@ -13,6 +13,7 @@
 import org.apache.lucene.search.DocIdSetIterator;
 import org.apache.lucene.search.FieldComparator;
 import org.apache.lucene.search.LeafFieldComparator;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.util.BitSet;
 import org.opensearch.index.fielddata.FieldData;
 import org.opensearch.index.fielddata.IndexNumericFieldData;
@@ -42,11 +43,11 @@ public HalfFloatValuesComparatorSource(
     }
 
     @Override
-    public FieldComparator<?> newComparator(String fieldname, int numHits, boolean enableSkipping, boolean reversed) {
+    public FieldComparator<?> newComparator(String fieldname, int numHits, Pruning pruning, boolean reversed) {
         assert indexFieldData == null || fieldname.equals(indexFieldData.getFieldName());
 
         final float fMissingValue = (Float) missingObject(missingValue, reversed);
-        return new HalfFloatComparator(numHits, fieldname, fMissingValue, reversed, enableSkipping && this.enableSkipping) {
+        return new HalfFloatComparator(numHits, fieldname, fMissingValue, reversed, filterPruning(pruning)) {
             @Override
             public LeafFieldComparator getLeafComparator(LeafReaderContext context) throws IOException {
                 return new HalfFloatLeafComparator(context) {
diff --git a/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/IntValuesComparatorSource.java b/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/IntValuesComparatorSource.java
index 3a3fdb85c3415..8f540cc6ae9d9 100644
--- a/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/IntValuesComparatorSource.java
+++ b/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/IntValuesComparatorSource.java
@@ -19,6 +19,7 @@
 import org.apache.lucene.search.DocIdSetIterator;
 import org.apache.lucene.search.FieldComparator;
 import org.apache.lucene.search.LeafFieldComparator;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.SortField;
 import org.apache.lucene.search.comparators.IntComparator;
 import org.apache.lucene.util.BitSet;
@@ -70,11 +71,11 @@ private NumericDocValues getNumericDocValues(LeafReaderContext context, int miss
     }
 
     @Override
-    public FieldComparator<?> newComparator(String fieldname, int numHits, boolean enableSkipping, boolean reversed) {
+    public FieldComparator<?> newComparator(String fieldname, int numHits, Pruning pruning, boolean reversed) {
         assert indexFieldData == null || fieldname.equals(indexFieldData.getFieldName());
 
         final int iMissingValue = (Integer) missingObject(missingValue, reversed);
-        return new IntComparator(numHits, fieldname, iMissingValue, reversed, enableSkipping && this.enableSkipping) {
+        return new IntComparator(numHits, fieldname, iMissingValue, reversed, filterPruning(pruning)) {
             @Override
             public LeafFieldComparator getLeafComparator(LeafReaderContext context) throws IOException {
                 return new IntLeafComparator(context) {
diff --git a/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/LongValuesComparatorSource.java b/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/LongValuesComparatorSource.java
index 57568aa84fa5c..3666cd8d6dfea 100644
--- a/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/LongValuesComparatorSource.java
+++ b/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/LongValuesComparatorSource.java
@@ -37,6 +37,7 @@
 import org.apache.lucene.search.DocIdSetIterator;
 import org.apache.lucene.search.FieldComparator;
 import org.apache.lucene.search.LeafFieldComparator;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.SortField;
 import org.apache.lucene.search.comparators.LongComparator;
 import org.apache.lucene.util.BitSet;
@@ -114,11 +115,11 @@ private NumericDocValues getNumericDocValues(LeafReaderContext context, long mis
     }
 
     @Override
-    public FieldComparator<?> newComparator(String fieldname, int numHits, boolean enableSkipping, boolean reversed) {
+    public FieldComparator<?> newComparator(String fieldname, int numHits, Pruning pruning, boolean reversed) {
         assert indexFieldData == null || fieldname.equals(indexFieldData.getFieldName());
 
         final long lMissingValue = (Long) missingObject(missingValue, reversed);
-        return new LongComparator(numHits, fieldname, lMissingValue, reversed, enableSkipping && this.enableSkipping) {
+        return new LongComparator(numHits, fieldname, lMissingValue, reversed, filterPruning(pruning)) {
             @Override
             public LeafFieldComparator getLeafComparator(LeafReaderContext context) throws IOException {
                 return new LongLeafComparator(context) {
diff --git a/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/UnsignedLongValuesComparatorSource.java b/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/UnsignedLongValuesComparatorSource.java
index 9d1edde1fe08f..3714561b63e44 100644
--- a/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/UnsignedLongValuesComparatorSource.java
+++ b/server/src/main/java/org/opensearch/index/fielddata/fieldcomparator/UnsignedLongValuesComparatorSource.java
@@ -14,6 +14,7 @@
 import org.apache.lucene.search.DocIdSetIterator;
 import org.apache.lucene.search.FieldComparator;
 import org.apache.lucene.search.LeafFieldComparator;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.SortField;
 import org.apache.lucene.util.BitSet;
 import org.opensearch.common.Nullable;
@@ -88,11 +89,11 @@ public Object missingObject(Object missingValue, boolean reversed) {
     }
 
     @Override
-    public FieldComparator<?> newComparator(String fieldname, int numHits, boolean enableSkipping, boolean reversed) {
+    public FieldComparator<?> newComparator(String fieldname, int numHits, Pruning pruning, boolean reversed) {
         assert indexFieldData == null || fieldname.equals(indexFieldData.getFieldName());
 
         final BigInteger ulMissingValue = (BigInteger) missingObject(missingValue, reversed);
-        return new UnsignedLongComparator(numHits, fieldname, ulMissingValue, reversed, enableSkipping && this.enableSkipping) {
+        return new UnsignedLongComparator(numHits, fieldname, ulMissingValue, reversed, filterPruning(pruning)) {
             @Override
             public LeafFieldComparator getLeafComparator(LeafReaderContext context) throws IOException {
                 return new UnsignedLongLeafComparator(context) {
diff --git a/server/src/main/java/org/opensearch/index/mapper/CompletionFieldMapper.java b/server/src/main/java/org/opensearch/index/mapper/CompletionFieldMapper.java
index e1413fd9b4bbe..a9d9f6cb35fcb 100644
--- a/server/src/main/java/org/opensearch/index/mapper/CompletionFieldMapper.java
+++ b/server/src/main/java/org/opensearch/index/mapper/CompletionFieldMapper.java
@@ -35,7 +35,7 @@
 import org.apache.lucene.document.FieldType;
 import org.apache.lucene.index.IndexOptions;
 import org.apache.lucene.index.Term;
-import org.apache.lucene.search.suggest.document.Completion90PostingsFormat;
+import org.apache.lucene.search.suggest.document.Completion99PostingsFormat;
 import org.apache.lucene.search.suggest.document.CompletionAnalyzer;
 import org.apache.lucene.search.suggest.document.CompletionQuery;
 import org.apache.lucene.search.suggest.document.FuzzyCompletionQuery;
@@ -330,7 +330,7 @@ public ContextMappings getContextMappings() {
          */
         public static synchronized PostingsFormat postingsFormat() {
             if (postingsFormat == null) {
-                postingsFormat = new Completion90PostingsFormat();
+                postingsFormat = new Completion99PostingsFormat();
             }
             return postingsFormat;
         }
diff --git a/server/src/main/java/org/opensearch/index/query/FieldMaskingSpanQueryBuilder.java b/server/src/main/java/org/opensearch/index/query/FieldMaskingSpanQueryBuilder.java
index 1162689a54689..4e73d87b07b7a 100644
--- a/server/src/main/java/org/opensearch/index/query/FieldMaskingSpanQueryBuilder.java
+++ b/server/src/main/java/org/opensearch/index/query/FieldMaskingSpanQueryBuilder.java
@@ -54,7 +54,9 @@
  * @opensearch.internal
  */
 public class FieldMaskingSpanQueryBuilder extends AbstractQueryBuilder<FieldMaskingSpanQueryBuilder> implements SpanQueryBuilder {
-    public static final ParseField SPAN_FIELD_MASKING_FIELD = new ParseField("span_field_masking", "field_masking_span");
+
+    public static final String NAME = "span_field_masking";
+    public static final ParseField SPAN_FIELD_MASKING_FIELD = new ParseField(NAME, "field_masking_span");
 
     private static final ParseField FIELD_FIELD = new ParseField("field");
     private static final ParseField QUERY_FIELD = new ParseField("query");
diff --git a/server/src/main/java/org/opensearch/index/search/comparators/HalfFloatComparator.java b/server/src/main/java/org/opensearch/index/search/comparators/HalfFloatComparator.java
index 6244fa647b042..b2e2ba8001b88 100644
--- a/server/src/main/java/org/opensearch/index/search/comparators/HalfFloatComparator.java
+++ b/server/src/main/java/org/opensearch/index/search/comparators/HalfFloatComparator.java
@@ -11,6 +11,7 @@
 import org.apache.lucene.index.LeafReaderContext;
 import org.apache.lucene.sandbox.document.HalfFloatPoint;
 import org.apache.lucene.search.LeafFieldComparator;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.comparators.NumericComparator;
 
 import java.io.IOException;
@@ -25,8 +26,8 @@ public class HalfFloatComparator extends NumericComparator<Float> {
     protected float topValue;
     protected float bottom;
 
-    public HalfFloatComparator(int numHits, String field, Float missingValue, boolean reverse, boolean enableSkipping) {
-        super(field, missingValue != null ? missingValue : 0.0f, reverse, enableSkipping, HalfFloatPoint.BYTES);
+    public HalfFloatComparator(int numHits, String field, Float missingValue, boolean reverse, Pruning pruning) {
+        super(field, missingValue != null ? missingValue : 0.0f, reverse, pruning, HalfFloatPoint.BYTES);
         values = new float[numHits];
     }
 
diff --git a/server/src/main/java/org/opensearch/index/search/comparators/UnsignedLongComparator.java b/server/src/main/java/org/opensearch/index/search/comparators/UnsignedLongComparator.java
index d46b34fe97356..2b6bd9933e553 100644
--- a/server/src/main/java/org/opensearch/index/search/comparators/UnsignedLongComparator.java
+++ b/server/src/main/java/org/opensearch/index/search/comparators/UnsignedLongComparator.java
@@ -11,6 +11,7 @@
 import org.apache.lucene.index.LeafReaderContext;
 import org.apache.lucene.sandbox.document.BigIntegerPoint;
 import org.apache.lucene.search.LeafFieldComparator;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.comparators.NumericComparator;
 import org.opensearch.common.Numbers;
 
@@ -23,8 +24,8 @@ public class UnsignedLongComparator extends NumericComparator<BigInteger> {
     protected BigInteger topValue;
     protected BigInteger bottom;
 
-    public UnsignedLongComparator(int numHits, String field, BigInteger missingValue, boolean reverse, boolean enableSkipping) {
-        super(field, missingValue != null ? missingValue : Numbers.MIN_UNSIGNED_LONG_VALUE, reverse, enableSkipping, BigIntegerPoint.BYTES);
+    public UnsignedLongComparator(int numHits, String field, BigInteger missingValue, boolean reverse, Pruning pruning) {
+        super(field, missingValue != null ? missingValue : Numbers.MIN_UNSIGNED_LONG_VALUE, reverse, pruning, BigIntegerPoint.BYTES);
         values = new BigInteger[numHits];
     }
 
diff --git a/server/src/main/java/org/opensearch/indices/IndicesRequestCache.java b/server/src/main/java/org/opensearch/indices/IndicesRequestCache.java
index 629cea102a8b2..4a19f8eb8714d 100644
--- a/server/src/main/java/org/opensearch/indices/IndicesRequestCache.java
+++ b/server/src/main/java/org/opensearch/indices/IndicesRequestCache.java
@@ -247,7 +247,7 @@ interface CacheEntity extends Accountable {
      *
      * @opensearch.internal
      */
-    static class Key implements Accountable {
+    public static class Key implements Accountable {
         private static final long BASE_RAM_BYTES_USED = RamUsageEstimator.shallowSizeOfInstance(Key.class);
 
         public final CacheEntity entity; // use as identity equality
@@ -328,6 +328,9 @@ public int hashCode() {
         }
     }
 
+    /**
+     * Logic to clean up in-memory cache.
+     */
     synchronized void cleanCache() {
         final Set<CleanupKey> currentKeysToClean = new HashSet<>();
         final Set<Object> currentFullClean = new HashSet<>();
@@ -355,7 +358,6 @@ synchronized void cleanCache() {
                 }
             }
         }
-
         cache.refresh();
     }
 
diff --git a/server/src/main/java/org/opensearch/ingest/IngestDocument.java b/server/src/main/java/org/opensearch/ingest/IngestDocument.java
index e0de0a9488ad9..10e9e64db561e 100644
--- a/server/src/main/java/org/opensearch/ingest/IngestDocument.java
+++ b/server/src/main/java/org/opensearch/ingest/IngestDocument.java
@@ -33,6 +33,7 @@
 package org.opensearch.ingest;
 
 import org.opensearch.core.common.Strings;
+import org.opensearch.core.common.util.CollectionUtils;
 import org.opensearch.index.VersionType;
 import org.opensearch.index.mapper.IdFieldMapper;
 import org.opensearch.index.mapper.IndexFieldMapper;
@@ -752,6 +753,7 @@ public Map<String, Object> getSourceAndMetadata() {
 
     @SuppressWarnings("unchecked")
     public static <K, V> Map<K, V> deepCopyMap(Map<K, V> source) {
+        CollectionUtils.ensureNoSelfReferences(source, "IngestDocument: Self reference present in object.");
         return (Map<K, V>) deepCopy(source);
     }
 
diff --git a/server/src/main/java/org/opensearch/lucene/queries/SearchAfterSortedDocQuery.java b/server/src/main/java/org/opensearch/lucene/queries/SearchAfterSortedDocQuery.java
index e417a2eaa7cf4..600ba5b5a92d8 100644
--- a/server/src/main/java/org/opensearch/lucene/queries/SearchAfterSortedDocQuery.java
+++ b/server/src/main/java/org/opensearch/lucene/queries/SearchAfterSortedDocQuery.java
@@ -40,6 +40,7 @@
 import org.apache.lucene.search.FieldDoc;
 import org.apache.lucene.search.IndexSearcher;
 import org.apache.lucene.search.LeafFieldComparator;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.Query;
 import org.apache.lucene.search.QueryVisitor;
 import org.apache.lucene.search.ScoreMode;
@@ -77,7 +78,7 @@ public SearchAfterSortedDocQuery(Sort sort, FieldDoc after) {
         this.reverseMuls = new int[numFields];
         for (int i = 0; i < numFields; i++) {
             SortField sortField = sort.getSort()[i];
-            FieldComparator<?> fieldComparator = sortField.getComparator(1, false);
+            FieldComparator<?> fieldComparator = sortField.getComparator(1, Pruning.NONE);
             @SuppressWarnings("unchecked")
             FieldComparator<Object> comparator = (FieldComparator<Object>) fieldComparator;
             comparator.setTopValue(after.fields[i]);
diff --git a/server/src/main/java/org/opensearch/search/aggregations/bucket/BestBucketsDeferringCollector.java b/server/src/main/java/org/opensearch/search/aggregations/bucket/BestBucketsDeferringCollector.java
index 2e7c4659bcb00..223be3ba2d1ae 100644
--- a/server/src/main/java/org/opensearch/search/aggregations/bucket/BestBucketsDeferringCollector.java
+++ b/server/src/main/java/org/opensearch/search/aggregations/bucket/BestBucketsDeferringCollector.java
@@ -90,7 +90,7 @@ static class Entry {
     protected PackedLongValues.Builder docDeltasBuilder;
     protected PackedLongValues.Builder bucketsBuilder;
     protected long maxBucket = -1;
-    protected boolean finished = false;
+    protected boolean finished;
     protected LongHash selectedBuckets;
 
     /**
@@ -101,6 +101,9 @@ static class Entry {
     public BestBucketsDeferringCollector(SearchContext context, boolean isGlobal) {
         this.searchContext = context;
         this.isGlobal = isGlobal;
+        // a postCollection call is not made by the IndexSearcher when there are no segments.
+        // In this case init the collector as finished.
+        this.finished = context.searcher().getLeafContexts().isEmpty();
     }
 
     @Override
diff --git a/server/src/main/java/org/opensearch/search/aggregations/bucket/composite/CompositeAggregator.java b/server/src/main/java/org/opensearch/search/aggregations/bucket/composite/CompositeAggregator.java
index f2a4d5cd46127..317c2a357bac5 100644
--- a/server/src/main/java/org/opensearch/search/aggregations/bucket/composite/CompositeAggregator.java
+++ b/server/src/main/java/org/opensearch/search/aggregations/bucket/composite/CompositeAggregator.java
@@ -45,6 +45,7 @@
 import org.apache.lucene.search.FieldComparator;
 import org.apache.lucene.search.FieldDoc;
 import org.apache.lucene.search.LeafFieldComparator;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.Query;
 import org.apache.lucene.search.ScoreMode;
 import org.apache.lucene.search.Scorer;
@@ -354,8 +355,8 @@ public int hashCode() {
                     }
 
                     @Override
-                    public FieldComparator<?> getComparator(int numHits, boolean enableSkipping) {
-                        return new LongComparator(1, delegate.getField(), (Long) missingValue, delegate.getReverse(), false) {
+                    public FieldComparator<?> getComparator(int numHits, Pruning pruning) {
+                        return new LongComparator(1, delegate.getField(), (Long) missingValue, delegate.getReverse(), Pruning.NONE) {
                             @Override
                             public LeafFieldComparator getLeafComparator(LeafReaderContext context) throws IOException {
                                 return new LongLeafComparator(context) {
diff --git a/server/src/main/java/org/opensearch/search/internal/ContextIndexSearcher.java b/server/src/main/java/org/opensearch/search/internal/ContextIndexSearcher.java
index b042f3cf41d61..403b0b545c113 100644
--- a/server/src/main/java/org/opensearch/search/internal/ContextIndexSearcher.java
+++ b/server/src/main/java/org/opensearch/search/internal/ContextIndexSearcher.java
@@ -102,6 +102,7 @@ public class ContextIndexSearcher extends IndexSearcher implements Releasable {
      * The interval at which we check for search cancellation when we cannot use
      * a {@link CancellableBulkScorer}. See {@link #intersectScorerAndBitSet}.
      */
+
     private static final int CHECK_CANCELLED_SCORER_INTERVAL = 1 << 11;
 
     private AggregatedDfs aggregatedDfs;
diff --git a/server/src/main/java/org/opensearch/search/sort/GeoDistanceSortBuilder.java b/server/src/main/java/org/opensearch/search/sort/GeoDistanceSortBuilder.java
index c4bb54de2eedd..0499bba3245c6 100644
--- a/server/src/main/java/org/opensearch/search/sort/GeoDistanceSortBuilder.java
+++ b/server/src/main/java/org/opensearch/search/sort/GeoDistanceSortBuilder.java
@@ -38,6 +38,7 @@
 import org.apache.lucene.search.DocIdSetIterator;
 import org.apache.lucene.search.FieldComparator;
 import org.apache.lucene.search.LeafFieldComparator;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.SortField;
 import org.apache.lucene.search.comparators.DoubleComparator;
 import org.apache.lucene.util.BitSet;
@@ -734,8 +735,8 @@ private NumericDoubleValues getNumericDoubleValues(LeafReaderContext context) th
             }
 
             @Override
-            public FieldComparator<?> newComparator(String fieldname, int numHits, boolean enableSkipping, boolean reversed) {
-                return new DoubleComparator(numHits, null, null, reversed, enableSkipping) {
+            public FieldComparator<?> newComparator(String fieldname, int numHits, Pruning pruning, boolean reversed) {
+                return new DoubleComparator(numHits, null, null, reversed, filterPruning(pruning)) {
                     @Override
                     public LeafFieldComparator getLeafComparator(LeafReaderContext context) throws IOException {
                         return new DoubleLeafComparator(context) {
diff --git a/server/src/main/java/org/opensearch/search/sort/SortedWiderNumericSortField.java b/server/src/main/java/org/opensearch/search/sort/SortedWiderNumericSortField.java
index bded2417ba6c1..10cc832fdb684 100644
--- a/server/src/main/java/org/opensearch/search/sort/SortedWiderNumericSortField.java
+++ b/server/src/main/java/org/opensearch/search/sort/SortedWiderNumericSortField.java
@@ -16,6 +16,7 @@
 import org.apache.lucene.index.LeafReaderContext;
 import org.apache.lucene.search.FieldComparator;
 import org.apache.lucene.search.LeafFieldComparator;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.SortedNumericSortField;
 import org.apache.lucene.search.comparators.NumericComparator;
 
@@ -44,13 +45,13 @@ public SortedWiderNumericSortField(String field, Type type, boolean reverse) {
      * Creates and return a comparator, which always converts Numeric to double
      * and compare to support multi type comparison between numeric values
      * @param numHits number of top hits the queue will store
-     * @param enableSkipping true if the comparator can skip documents via {@link
+     * @param pruning controls how the comparator skips documents via {@link
      *     LeafFieldComparator#competitiveIterator()}
      * @return NumericComparator
      */
     @Override
-    public FieldComparator<?> getComparator(int numHits, boolean enableSkipping) {
-        return new NumericComparator<Number>(getField(), (Number) getMissingValue(), getReverse(), enableSkipping, Double.BYTES) {
+    public FieldComparator<?> getComparator(int numHits, Pruning pruning) {
+        return new NumericComparator<Number>(getField(), (Number) getMissingValue(), getReverse(), pruning, Double.BYTES) {
             @Override
             public int compare(int slot1, int slot2) {
                 throw new UnsupportedOperationException();
diff --git a/server/src/main/java/org/opensearch/tasks/TaskThreadContextStatePropagator.java b/server/src/main/java/org/opensearch/tasks/TaskThreadContextStatePropagator.java
index ed111b34f048f..99559e45aaaee 100644
--- a/server/src/main/java/org/opensearch/tasks/TaskThreadContextStatePropagator.java
+++ b/server/src/main/java/org/opensearch/tasks/TaskThreadContextStatePropagator.java
@@ -20,7 +20,9 @@
  * Propagates TASK_ID across thread contexts
  */
 public class TaskThreadContextStatePropagator implements ThreadContextStatePropagator {
+
     @Override
+    @SuppressWarnings("removal")
     public Map<String, Object> transients(Map<String, Object> source) {
         final Map<String, Object> transients = new HashMap<>();
 
@@ -32,7 +34,18 @@ public Map<String, Object> transients(Map<String, Object> source) {
     }
 
     @Override
+    public Map<String, Object> transients(Map<String, Object> source, boolean isSystemContext) {
+        return transients(source);
+    }
+
+    @Override
+    @SuppressWarnings("removal")
     public Map<String, String> headers(Map<String, Object> source) {
         return Collections.emptyMap();
     }
+
+    @Override
+    public Map<String, String> headers(Map<String, Object> source, boolean isSystemContext) {
+        return headers(source);
+    }
 }
diff --git a/server/src/main/java/org/opensearch/telemetry/tracing/ThreadContextBasedTracerContextStorage.java b/server/src/main/java/org/opensearch/telemetry/tracing/ThreadContextBasedTracerContextStorage.java
index 863f56d9fbe94..908164d1935a7 100644
--- a/server/src/main/java/org/opensearch/telemetry/tracing/ThreadContextBasedTracerContextStorage.java
+++ b/server/src/main/java/org/opensearch/telemetry/tracing/ThreadContextBasedTracerContextStorage.java
@@ -12,6 +12,7 @@
 import org.opensearch.common.util.concurrent.ThreadContext;
 import org.opensearch.common.util.concurrent.ThreadContextStatePropagator;
 
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Objects;
@@ -50,20 +51,29 @@ public void put(String key, Span span) {
     }
 
     @Override
+    @SuppressWarnings("removal")
     public Map<String, Object> transients(Map<String, Object> source) {
         final Map<String, Object> transients = new HashMap<>();
-
         if (source.containsKey(CURRENT_SPAN)) {
             final SpanReference current = (SpanReference) source.get(CURRENT_SPAN);
             if (current != null) {
                 transients.put(CURRENT_SPAN, new SpanReference(current.getSpan()));
             }
         }
-
         return transients;
     }
 
     @Override
+    public Map<String, Object> transients(Map<String, Object> source, boolean isSystemContext) {
+        if (isSystemContext == true) {
+            return Collections.emptyMap();
+        } else {
+            return transients(source);
+        }
+    }
+
+    @Override
+    @SuppressWarnings("removal")
     public Map<String, String> headers(Map<String, Object> source) {
         final Map<String, String> headers = new HashMap<>();
 
@@ -77,6 +87,11 @@ public Map<String, String> headers(Map<String, Object> source) {
         return headers;
     }
 
+    @Override
+    public Map<String, String> headers(Map<String, Object> source, boolean isSystemContext) {
+        return headers(source);
+    }
+
     Span getCurrentSpan(String key) {
         SpanReference currentSpanRef = threadContext.getTransient(key);
         return (currentSpanRef == null) ? null : currentSpanRef.getSpan();
diff --git a/server/src/main/java/org/opensearch/transport/TransportService.java b/server/src/main/java/org/opensearch/transport/TransportService.java
index a1697b1898eeb..d50266d8c9e4a 100644
--- a/server/src/main/java/org/opensearch/transport/TransportService.java
+++ b/server/src/main/java/org/opensearch/transport/TransportService.java
@@ -868,19 +868,10 @@ public final <T extends TransportResponse> void sendRequest(
         final TransportRequestOptions options,
         final TransportResponseHandler<T> handler
     ) {
-        if (connection == localNodeConnection) {
-            // See please https://github.com/opensearch-project/OpenSearch/issues/10291
-            sendRequestAsync(connection, action, request, options, handler);
-        } else {
-            final Span span = tracer.startSpan(SpanBuilder.from(action, connection));
-            try (SpanScope spanScope = tracer.withSpanInScope(span)) {
-                TransportResponseHandler<T> traceableTransportResponseHandler = TraceableTransportResponseHandler.create(
-                    handler,
-                    span,
-                    tracer
-                );
-                sendRequestAsync(connection, action, request, options, traceableTransportResponseHandler);
-            }
+        final Span span = tracer.startSpan(SpanBuilder.from(action, connection));
+        try (SpanScope spanScope = tracer.withSpanInScope(span)) {
+            TransportResponseHandler<T> traceableTransportResponseHandler = TraceableTransportResponseHandler.create(handler, span, tracer);
+            sendRequestAsync(connection, action, request, options, traceableTransportResponseHandler);
         }
     }
 
diff --git a/server/src/test/java/org/opensearch/action/admin/indices/alias/AliasActionsTests.java b/server/src/test/java/org/opensearch/action/admin/indices/alias/AliasActionsTests.java
index 8ba8d226715ed..d463782a70506 100644
--- a/server/src/test/java/org/opensearch/action/admin/indices/alias/AliasActionsTests.java
+++ b/server/src/test/java/org/opensearch/action/admin/indices/alias/AliasActionsTests.java
@@ -241,6 +241,7 @@ public void testParseRemove() throws IOException {
         String[] indices = generateRandomStringArray(10, 5, false, false);
         String[] aliases = generateRandomStringArray(10, 5, false, false);
         XContentBuilder b = XContentBuilder.builder(randomFrom(XContentType.values()).xContent());
+        boolean mustExist = randomBoolean();
         b.startObject();
         {
             b.startObject("remove");
@@ -255,6 +256,9 @@ public void testParseRemove() throws IOException {
                 } else {
                     b.field("alias", aliases[0]);
                 }
+                if (mustExist) {
+                    b.field("must_exist", true);
+                }
             }
             b.endObject();
         }
@@ -265,6 +269,9 @@ public void testParseRemove() throws IOException {
             assertEquals(AliasActions.Type.REMOVE, action.actionType());
             assertThat(action.indices(), equalTo(indices));
             assertThat(action.aliases(), equalTo(aliases));
+            if (mustExist) {
+                assertThat(action.mustExist(), equalTo(true));
+            }
         }
     }
 
diff --git a/server/src/test/java/org/opensearch/action/search/BottomSortValuesCollectorTests.java b/server/src/test/java/org/opensearch/action/search/BottomSortValuesCollectorTests.java
index 8042a7e296869..4f929a71429a6 100644
--- a/server/src/test/java/org/opensearch/action/search/BottomSortValuesCollectorTests.java
+++ b/server/src/test/java/org/opensearch/action/search/BottomSortValuesCollectorTests.java
@@ -34,6 +34,7 @@
 
 import org.apache.lucene.search.FieldComparator;
 import org.apache.lucene.search.FieldDoc;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.SortField;
 import org.apache.lucene.search.TopFieldDocs;
 import org.apache.lucene.search.TotalHits;
@@ -264,7 +265,7 @@ private Object[] newDateNanoArray(String... values) {
 
     private TopFieldDocs createTopDocs(SortField sortField, int totalHits, Object[] values) {
         FieldDoc[] fieldDocs = new FieldDoc[values.length];
-        FieldComparator cmp = sortField.getComparator(1, false);
+        FieldComparator cmp = sortField.getComparator(1, Pruning.NONE);
         for (int i = 0; i < values.length; i++) {
             fieldDocs[i] = new FieldDoc(i, Float.NaN, new Object[] { values[i] });
         }
diff --git a/server/src/test/java/org/opensearch/action/search/SearchQueryCategorizerTests.java b/server/src/test/java/org/opensearch/action/search/SearchQueryCategorizerTests.java
index a2e301143d694..17fa124890158 100644
--- a/server/src/test/java/org/opensearch/action/search/SearchQueryCategorizerTests.java
+++ b/server/src/test/java/org/opensearch/action/search/SearchQueryCategorizerTests.java
@@ -34,16 +34,19 @@
 
 import java.util.Arrays;
 
-import org.mockito.Mockito;
+import org.mockito.ArgumentCaptor;
 
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
 public final class SearchQueryCategorizerTests extends OpenSearchTestCase {
 
+    private static final String MULTI_TERMS_AGGREGATION = "multi_terms";
+
     private MetricsRegistry metricsRegistry;
 
     private SearchQueryCategorizer searchQueryCategorizer;
@@ -71,7 +74,20 @@ public void testAggregationsQuery() {
 
         searchQueryCategorizer.categorize(sourceBuilder);
 
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.aggCounter).add(eq(1.0d));
+        verify(searchQueryCategorizer.searchQueryCounters.aggCounter).add(eq(1.0d), any(Tags.class));
+
+        // capture the arguments passed to the aggCounter.add method
+        ArgumentCaptor<Double> valueCaptor = ArgumentCaptor.forClass(Double.class);
+        ArgumentCaptor<Tags> tagsCaptor = ArgumentCaptor.forClass(Tags.class);
+
+        // Verify that aggCounter.add was called with the expected arguments
+        verify(searchQueryCategorizer.searchQueryCounters.aggCounter).add(valueCaptor.capture(), tagsCaptor.capture());
+
+        double actualValue = valueCaptor.getValue();
+        String actualTag = (String) tagsCaptor.getValue().getTagsMap().get("type");
+
+        assertEquals(1.0d, actualValue, 0.0001);
+        assertEquals(MULTI_TERMS_AGGREGATION, actualTag);
     }
 
     public void testBoolQuery() {
@@ -81,8 +97,8 @@ public void testBoolQuery() {
 
         searchQueryCategorizer.categorize(sourceBuilder);
 
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.boolCounter).add(eq(1.0d), any(Tags.class));
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.matchCounter).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.boolCounter).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.matchCounter).add(eq(1.0d), any(Tags.class));
     }
 
     public void testFunctionScoreQuery() {
@@ -92,7 +108,7 @@ public void testFunctionScoreQuery() {
 
         searchQueryCategorizer.categorize(sourceBuilder);
 
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.functionScoreCounter).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.functionScoreCounter).add(eq(1.0d), any(Tags.class));
     }
 
     public void testMatchQuery() {
@@ -102,7 +118,7 @@ public void testMatchQuery() {
 
         searchQueryCategorizer.categorize(sourceBuilder);
 
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.matchCounter).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.matchCounter).add(eq(1.0d), any(Tags.class));
     }
 
     public void testMatchPhraseQuery() {
@@ -112,7 +128,7 @@ public void testMatchPhraseQuery() {
 
         searchQueryCategorizer.categorize(sourceBuilder);
 
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.matchPhrasePrefixCounter).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.matchPhrasePrefixCounter).add(eq(1.0d), any(Tags.class));
     }
 
     public void testMultiMatchQuery() {
@@ -122,7 +138,7 @@ public void testMultiMatchQuery() {
 
         searchQueryCategorizer.categorize(sourceBuilder);
 
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.multiMatchCounter).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.multiMatchCounter).add(eq(1.0d), any(Tags.class));
     }
 
     public void testOtherQuery() {
@@ -136,8 +152,8 @@ public void testOtherQuery() {
 
         searchQueryCategorizer.categorize(sourceBuilder);
 
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.otherQueryCounter, times(2)).add(eq(1.0d), any(Tags.class));
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.termCounter).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.otherQueryCounter, times(1)).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.termCounter).add(eq(1.0d), any(Tags.class));
     }
 
     public void testQueryStringQuery() {
@@ -148,7 +164,7 @@ public void testQueryStringQuery() {
 
         searchQueryCategorizer.categorize(sourceBuilder);
 
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.queryStringQueryCounter).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.queryStringCounter).add(eq(1.0d), any(Tags.class));
     }
 
     public void testRangeQuery() {
@@ -160,7 +176,7 @@ public void testRangeQuery() {
 
         searchQueryCategorizer.categorize(sourceBuilder);
 
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.rangeCounter).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.rangeCounter).add(eq(1.0d), any(Tags.class));
     }
 
     public void testRegexQuery() {
@@ -169,7 +185,7 @@ public void testRegexQuery() {
 
         searchQueryCategorizer.categorize(sourceBuilder);
 
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.regexCounter).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.regexpCounter).add(eq(1.0d), any(Tags.class));
     }
 
     public void testSortQuery() {
@@ -180,8 +196,8 @@ public void testSortQuery() {
 
         searchQueryCategorizer.categorize(sourceBuilder);
 
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.matchCounter).add(eq(1.0d), any(Tags.class));
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.sortCounter, times(2)).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.matchCounter).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.sortCounter, times(2)).add(eq(1.0d), any(Tags.class));
     }
 
     public void testTermQuery() {
@@ -191,7 +207,7 @@ public void testTermQuery() {
 
         searchQueryCategorizer.categorize(sourceBuilder);
 
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.termCounter).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.termCounter).add(eq(1.0d), any(Tags.class));
     }
 
     public void testWildcardQuery() {
@@ -201,7 +217,7 @@ public void testWildcardQuery() {
 
         searchQueryCategorizer.categorize(sourceBuilder);
 
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.wildcardCounter).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.wildcardCounter).add(eq(1.0d), any(Tags.class));
     }
 
     public void testComplexQuery() {
@@ -219,10 +235,10 @@ public void testComplexQuery() {
 
         searchQueryCategorizer.categorize(sourceBuilder);
 
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.termCounter).add(eq(1.0d), any(Tags.class));
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.matchCounter).add(eq(1.0d), any(Tags.class));
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.regexCounter).add(eq(1.0d), any(Tags.class));
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.boolCounter).add(eq(1.0d), any(Tags.class));
-        Mockito.verify(searchQueryCategorizer.searchQueryCounters.aggCounter).add(eq(1.0d));
+        verify(searchQueryCategorizer.searchQueryCounters.termCounter).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.matchCounter).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.regexpCounter).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.boolCounter).add(eq(1.0d), any(Tags.class));
+        verify(searchQueryCategorizer.searchQueryCounters.aggCounter).add(eq(1.0d), any(Tags.class));
     }
 }
diff --git a/server/src/test/java/org/opensearch/cluster/metadata/MetadataIndexAliasesServiceTests.java b/server/src/test/java/org/opensearch/cluster/metadata/MetadataIndexAliasesServiceTests.java
index bf66f577e182b..9fb4551f106ec 100644
--- a/server/src/test/java/org/opensearch/cluster/metadata/MetadataIndexAliasesServiceTests.java
+++ b/server/src/test/java/org/opensearch/cluster/metadata/MetadataIndexAliasesServiceTests.java
@@ -40,6 +40,7 @@
 import org.opensearch.common.util.set.Sets;
 import org.opensearch.core.index.Index;
 import org.opensearch.index.IndexNotFoundException;
+import org.opensearch.rest.action.admin.indices.AliasesNotFoundException;
 import org.opensearch.test.OpenSearchTestCase;
 import org.opensearch.test.VersionUtils;
 
@@ -164,11 +165,11 @@ public void testMustExist() {
 
         // Show that removing non-existing alias with mustExist == true fails
         final ClusterState finalCS = after;
-        final IllegalArgumentException iae = expectThrows(
-            IllegalArgumentException.class,
+        final AliasesNotFoundException iae = expectThrows(
+            AliasesNotFoundException.class,
             () -> service.applyAliasActions(finalCS, singletonList(new AliasAction.Remove(index, "test_2", true)))
         );
-        assertThat(iae.getMessage(), containsString("required alias [test_2] does not exist"));
+        assertThat(iae.getMessage(), containsString("aliases [test_2] missing"));
     }
 
     public void testMultipleIndices() {
diff --git a/server/src/test/java/org/opensearch/common/cache/tier/TieredSpilloverCacheTests.java b/server/src/test/java/org/opensearch/common/cache/tier/TieredSpilloverCacheTests.java
new file mode 100644
index 0000000000000..eb75244c6f8b1
--- /dev/null
+++ b/server/src/test/java/org/opensearch/common/cache/tier/TieredSpilloverCacheTests.java
@@ -0,0 +1,786 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.common.cache.tier;
+
+import org.opensearch.common.cache.LoadAwareCacheLoader;
+import org.opensearch.common.cache.RemovalReason;
+import org.opensearch.common.cache.store.OpenSearchOnHeapCache;
+import org.opensearch.common.cache.store.StoreAwareCache;
+import org.opensearch.common.cache.store.StoreAwareCacheRemovalNotification;
+import org.opensearch.common.cache.store.builders.StoreAwareCacheBuilder;
+import org.opensearch.common.cache.store.enums.CacheStoreType;
+import org.opensearch.common.cache.store.listeners.StoreAwareCacheEventListener;
+import org.opensearch.common.metrics.CounterMetric;
+import org.opensearch.test.OpenSearchTestCase;
+
+import java.util.ArrayList;
+import java.util.EnumMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Phaser;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicReference;
+
+public class TieredSpilloverCacheTests extends OpenSearchTestCase {
+
+    public void testComputeIfAbsentWithoutAnyOnHeapCacheEviction() throws Exception {
+        int onHeapCacheSize = randomIntBetween(10, 30);
+        MockCacheEventListener<String, String> eventListener = new MockCacheEventListener<String, String>();
+        TieredSpilloverCache<String, String> tieredSpilloverCache = intializeTieredSpilloverCache(
+            onHeapCacheSize,
+            randomIntBetween(1, 4),
+            eventListener,
+            0
+        );
+        int numOfItems1 = randomIntBetween(1, onHeapCacheSize / 2 - 1);
+        List<String> keys = new ArrayList<>();
+        // Put values in cache.
+        for (int iter = 0; iter < numOfItems1; iter++) {
+            String key = UUID.randomUUID().toString();
+            keys.add(key);
+            LoadAwareCacheLoader<String, String> tieredCacheLoader = getLoadAwareCacheLoader();
+            tieredSpilloverCache.computeIfAbsent(key, tieredCacheLoader);
+        }
+        assertEquals(numOfItems1, eventListener.enumMap.get(CacheStoreType.ON_HEAP).missCount.count());
+        assertEquals(0, eventListener.enumMap.get(CacheStoreType.ON_HEAP).hitCount.count());
+        assertEquals(0, eventListener.enumMap.get(CacheStoreType.ON_HEAP).evictionsMetric.count());
+
+        // Try to hit cache again with some randomization.
+        int numOfItems2 = randomIntBetween(1, onHeapCacheSize / 2 - 1);
+        int cacheHit = 0;
+        int cacheMiss = 0;
+        for (int iter = 0; iter < numOfItems2; iter++) {
+            if (randomBoolean()) {
+                // Hit cache with stored key
+                cacheHit++;
+                int index = randomIntBetween(0, keys.size() - 1);
+                tieredSpilloverCache.computeIfAbsent(keys.get(index), getLoadAwareCacheLoader());
+            } else {
+                // Hit cache with randomized key which is expected to miss cache always.
+                tieredSpilloverCache.computeIfAbsent(UUID.randomUUID().toString(), getLoadAwareCacheLoader());
+                cacheMiss++;
+            }
+        }
+        assertEquals(cacheHit, eventListener.enumMap.get(CacheStoreType.ON_HEAP).hitCount.count());
+        assertEquals(numOfItems1 + cacheMiss, eventListener.enumMap.get(CacheStoreType.ON_HEAP).missCount.count());
+        assertEquals(0, eventListener.enumMap.get(CacheStoreType.ON_HEAP).evictionsMetric.count());
+    }
+
+    public void testComputeIfAbsentWithEvictionsFromOnHeapCache() throws Exception {
+        int onHeapCacheSize = randomIntBetween(10, 30);
+        int diskCacheSize = randomIntBetween(60, 100);
+        int totalSize = onHeapCacheSize + diskCacheSize;
+        MockCacheEventListener<String, String> eventListener = new MockCacheEventListener<String, String>();
+        StoreAwareCacheBuilder<String, String> cacheBuilder = new OpenSearchOnHeapCache.Builder<String, String>().setMaximumWeightInBytes(
+            onHeapCacheSize * 50
+        ).setWeigher((k, v) -> 50); // Will support onHeapCacheSize entries.
+
+        StoreAwareCacheBuilder<String, String> diskCacheBuilder = new MockOnDiskCache.Builder<String, String>().setMaxSize(diskCacheSize)
+            .setDeliberateDelay(0);
+
+        TieredSpilloverCache<String, String> tieredSpilloverCache = new TieredSpilloverCache.Builder<String, String>()
+            .setOnHeapCacheBuilder(cacheBuilder)
+            .setOnDiskCacheBuilder(diskCacheBuilder)
+            .setListener(eventListener)
+            .build();
+
+        // Put values in cache more than it's size and cause evictions from onHeap.
+        int numOfItems1 = randomIntBetween(onHeapCacheSize + 1, totalSize);
+        List<String> onHeapKeys = new ArrayList<>();
+        List<String> diskTierKeys = new ArrayList<>();
+        for (int iter = 0; iter < numOfItems1; iter++) {
+            String key = UUID.randomUUID().toString();
+            LoadAwareCacheLoader<String, String> tieredCacheLoader = getLoadAwareCacheLoader();
+            tieredSpilloverCache.computeIfAbsent(key, tieredCacheLoader);
+        }
+        long actualDiskCacheSize = tieredSpilloverCache.getOnDiskCache().get().count();
+        assertEquals(numOfItems1, eventListener.enumMap.get(CacheStoreType.ON_HEAP).missCount.count());
+        assertEquals(0, eventListener.enumMap.get(CacheStoreType.ON_HEAP).hitCount.count());
+        assertEquals(actualDiskCacheSize, eventListener.enumMap.get(CacheStoreType.ON_HEAP).evictionsMetric.count());
+
+        assertEquals(
+            eventListener.enumMap.get(CacheStoreType.ON_HEAP).evictionsMetric.count(),
+            eventListener.enumMap.get(CacheStoreType.DISK).cachedCount.count()
+        );
+        assertEquals(actualDiskCacheSize, eventListener.enumMap.get(CacheStoreType.DISK).cachedCount.count());
+
+        tieredSpilloverCache.getOnHeapCache().keys().forEach(onHeapKeys::add);
+        tieredSpilloverCache.getOnDiskCache().get().keys().forEach(diskTierKeys::add);
+
+        assertEquals(tieredSpilloverCache.getOnHeapCache().count(), onHeapKeys.size());
+        assertEquals(tieredSpilloverCache.getOnDiskCache().get().count(), diskTierKeys.size());
+
+        // Try to hit cache again with some randomization.
+        int numOfItems2 = randomIntBetween(50, 200);
+        int onHeapCacheHit = 0;
+        int diskCacheHit = 0;
+        int cacheMiss = 0;
+        for (int iter = 0; iter < numOfItems2; iter++) {
+            if (randomBoolean()) { // Hit cache with key stored in onHeap cache.
+                onHeapCacheHit++;
+                int index = randomIntBetween(0, onHeapKeys.size() - 1);
+                LoadAwareCacheLoader<String, String> loadAwareCacheLoader = getLoadAwareCacheLoader();
+                tieredSpilloverCache.computeIfAbsent(onHeapKeys.get(index), loadAwareCacheLoader);
+                assertFalse(loadAwareCacheLoader.isLoaded());
+            } else { // Hit cache with key stored in disk cache.
+                diskCacheHit++;
+                int index = randomIntBetween(0, diskTierKeys.size() - 1);
+                LoadAwareCacheLoader<String, String> loadAwareCacheLoader = getLoadAwareCacheLoader();
+                tieredSpilloverCache.computeIfAbsent(diskTierKeys.get(index), loadAwareCacheLoader);
+                assertFalse(loadAwareCacheLoader.isLoaded());
+            }
+        }
+        for (int iter = 0; iter < randomIntBetween(50, 200); iter++) {
+            // Hit cache with randomized key which is expected to miss cache always.
+            LoadAwareCacheLoader<String, String> tieredCacheLoader = getLoadAwareCacheLoader();
+            tieredSpilloverCache.computeIfAbsent(UUID.randomUUID().toString(), tieredCacheLoader);
+            cacheMiss++;
+        }
+        // On heap cache misses would also include diskCacheHits as it means it missed onHeap cache.
+        assertEquals(numOfItems1 + cacheMiss + diskCacheHit, eventListener.enumMap.get(CacheStoreType.ON_HEAP).missCount.count());
+        assertEquals(onHeapCacheHit, eventListener.enumMap.get(CacheStoreType.ON_HEAP).hitCount.count());
+        assertEquals(cacheMiss + numOfItems1, eventListener.enumMap.get(CacheStoreType.DISK).missCount.count());
+        assertEquals(diskCacheHit, eventListener.enumMap.get(CacheStoreType.DISK).hitCount.count());
+    }
+
+    public void testComputeIfAbsentWithEvictionsFromBothTier() throws Exception {
+        int onHeapCacheSize = randomIntBetween(10, 30);
+        int diskCacheSize = randomIntBetween(onHeapCacheSize + 1, 100);
+        int totalSize = onHeapCacheSize + diskCacheSize;
+
+        MockCacheEventListener<String, String> eventListener = new MockCacheEventListener<String, String>();
+        TieredSpilloverCache<String, String> tieredSpilloverCache = intializeTieredSpilloverCache(
+            onHeapCacheSize,
+            diskCacheSize,
+            eventListener,
+            0
+        );
+
+        int numOfItems = randomIntBetween(totalSize + 1, totalSize * 3);
+        for (int iter = 0; iter < numOfItems; iter++) {
+            LoadAwareCacheLoader<String, String> tieredCacheLoader = getLoadAwareCacheLoader();
+            tieredSpilloverCache.computeIfAbsent(UUID.randomUUID().toString(), tieredCacheLoader);
+        }
+        assertTrue(eventListener.enumMap.get(CacheStoreType.ON_HEAP).evictionsMetric.count() > 0);
+        assertTrue(eventListener.enumMap.get(CacheStoreType.DISK).evictionsMetric.count() > 0);
+    }
+
+    public void testGetAndCount() throws Exception {
+        int onHeapCacheSize = randomIntBetween(10, 30);
+        int diskCacheSize = randomIntBetween(onHeapCacheSize + 1, 100);
+        int totalSize = onHeapCacheSize + diskCacheSize;
+
+        MockCacheEventListener<String, String> eventListener = new MockCacheEventListener<String, String>();
+        TieredSpilloverCache<String, String> tieredSpilloverCache = intializeTieredSpilloverCache(
+            onHeapCacheSize,
+            diskCacheSize,
+            eventListener,
+            0
+        );
+
+        int numOfItems1 = randomIntBetween(onHeapCacheSize + 1, totalSize);
+        List<String> onHeapKeys = new ArrayList<>();
+        List<String> diskTierKeys = new ArrayList<>();
+        for (int iter = 0; iter < numOfItems1; iter++) {
+            String key = UUID.randomUUID().toString();
+            if (iter > (onHeapCacheSize - 1)) {
+                // All these are bound to go to disk based cache.
+                diskTierKeys.add(key);
+            } else {
+                onHeapKeys.add(key);
+            }
+            LoadAwareCacheLoader<String, String> loadAwareCacheLoader = getLoadAwareCacheLoader();
+            tieredSpilloverCache.computeIfAbsent(key, loadAwareCacheLoader);
+        }
+
+        for (int iter = 0; iter < numOfItems1; iter++) {
+            if (randomBoolean()) {
+                if (randomBoolean()) {
+                    int index = randomIntBetween(0, onHeapKeys.size() - 1);
+                    assertNotNull(tieredSpilloverCache.get(onHeapKeys.get(index)));
+                } else {
+                    int index = randomIntBetween(0, diskTierKeys.size() - 1);
+                    assertNotNull(tieredSpilloverCache.get(diskTierKeys.get(index)));
+                }
+            } else {
+                assertNull(tieredSpilloverCache.get(UUID.randomUUID().toString()));
+            }
+        }
+        assertEquals(numOfItems1, tieredSpilloverCache.count());
+    }
+
+    public void testWithDiskTierNull() throws Exception {
+        int onHeapCacheSize = randomIntBetween(10, 30);
+        MockCacheEventListener<String, String> eventListener = new MockCacheEventListener<String, String>();
+
+        StoreAwareCacheBuilder<String, String> onHeapCacheBuilder = new OpenSearchOnHeapCache.Builder<String, String>()
+            .setMaximumWeightInBytes(onHeapCacheSize * 20)
+            .setWeigher((k, v) -> 20); // Will support upto onHeapCacheSize entries
+        TieredSpilloverCache<String, String> tieredSpilloverCache = new TieredSpilloverCache.Builder<String, String>()
+            .setOnHeapCacheBuilder(onHeapCacheBuilder)
+            .setListener(eventListener)
+            .build();
+
+        int numOfItems = randomIntBetween(onHeapCacheSize + 1, onHeapCacheSize * 3);
+        for (int iter = 0; iter < numOfItems; iter++) {
+            LoadAwareCacheLoader<String, String> loadAwareCacheLoader = getLoadAwareCacheLoader();
+            tieredSpilloverCache.computeIfAbsent(UUID.randomUUID().toString(), loadAwareCacheLoader);
+        }
+        assertTrue(eventListener.enumMap.get(CacheStoreType.ON_HEAP).evictionsMetric.count() > 0);
+        assertEquals(0, eventListener.enumMap.get(CacheStoreType.DISK).cachedCount.count());
+        assertEquals(0, eventListener.enumMap.get(CacheStoreType.DISK).evictionsMetric.count());
+        assertEquals(0, eventListener.enumMap.get(CacheStoreType.DISK).missCount.count());
+    }
+
+    public void testPut() {
+        int onHeapCacheSize = randomIntBetween(10, 30);
+        int diskCacheSize = randomIntBetween(onHeapCacheSize + 1, 100);
+
+        MockCacheEventListener<String, String> eventListener = new MockCacheEventListener<>();
+        TieredSpilloverCache<String, String> tieredSpilloverCache = intializeTieredSpilloverCache(
+            onHeapCacheSize,
+            diskCacheSize,
+            eventListener,
+            0
+        );
+        String key = UUID.randomUUID().toString();
+        String value = UUID.randomUUID().toString();
+        tieredSpilloverCache.put(key, value);
+        assertEquals(1, eventListener.enumMap.get(CacheStoreType.ON_HEAP).cachedCount.count());
+        assertEquals(1, tieredSpilloverCache.count());
+    }
+
+    public void testPutAndVerifyNewItemsArePresentOnHeapCache() throws Exception {
+        int onHeapCacheSize = randomIntBetween(200, 400);
+        int diskCacheSize = randomIntBetween(450, 800);
+
+        MockCacheEventListener<String, String> eventListener = new MockCacheEventListener<>();
+
+        TieredSpilloverCache<String, String> tieredSpilloverCache = intializeTieredSpilloverCache(
+            onHeapCacheSize,
+            diskCacheSize,
+            eventListener,
+            0
+        );
+
+        for (int i = 0; i < onHeapCacheSize; i++) {
+            tieredSpilloverCache.computeIfAbsent(UUID.randomUUID().toString(), new LoadAwareCacheLoader<>() {
+                @Override
+                public boolean isLoaded() {
+                    return false;
+                }
+
+                @Override
+                public String load(String key) throws Exception {
+                    return UUID.randomUUID().toString();
+                }
+            });
+        }
+
+        assertEquals(onHeapCacheSize, tieredSpilloverCache.getOnHeapCache().count());
+        assertEquals(0, tieredSpilloverCache.getOnDiskCache().get().count());
+
+        // Again try to put OnHeap cache capacity amount of new items.
+        List<String> newKeyList = new ArrayList<>();
+        for (int i = 0; i < onHeapCacheSize; i++) {
+            newKeyList.add(UUID.randomUUID().toString());
+        }
+
+        for (int i = 0; i < newKeyList.size(); i++) {
+            tieredSpilloverCache.computeIfAbsent(newKeyList.get(i), new LoadAwareCacheLoader<>() {
+                @Override
+                public boolean isLoaded() {
+                    return false;
+                }
+
+                @Override
+                public String load(String key) {
+                    return UUID.randomUUID().toString();
+                }
+            });
+        }
+
+        // Verify that new items are part of onHeap cache.
+        List<String> actualOnHeapCacheKeys = new ArrayList<>();
+        tieredSpilloverCache.getOnHeapCache().keys().forEach(actualOnHeapCacheKeys::add);
+
+        assertEquals(newKeyList.size(), actualOnHeapCacheKeys.size());
+        for (int i = 0; i < actualOnHeapCacheKeys.size(); i++) {
+            assertTrue(newKeyList.contains(actualOnHeapCacheKeys.get(i)));
+        }
+
+        assertEquals(onHeapCacheSize, tieredSpilloverCache.getOnHeapCache().count());
+        assertEquals(onHeapCacheSize, tieredSpilloverCache.getOnDiskCache().get().count());
+    }
+
+    public void testInvalidate() {
+        int onHeapCacheSize = 1;
+        int diskCacheSize = 10;
+
+        MockCacheEventListener<String, String> eventListener = new MockCacheEventListener<>();
+        TieredSpilloverCache<String, String> tieredSpilloverCache = intializeTieredSpilloverCache(
+            onHeapCacheSize,
+            diskCacheSize,
+            eventListener,
+            0
+        );
+        String key = UUID.randomUUID().toString();
+        String value = UUID.randomUUID().toString();
+        // First try to invalidate without the key present in cache.
+        tieredSpilloverCache.invalidate(key);
+        assertEquals(0, eventListener.enumMap.get(CacheStoreType.ON_HEAP).invalidationMetric.count());
+
+        // Now try to invalidate with the key present in onHeap cache.
+        tieredSpilloverCache.put(key, value);
+        tieredSpilloverCache.invalidate(key);
+        assertEquals(1, eventListener.enumMap.get(CacheStoreType.ON_HEAP).invalidationMetric.count());
+        assertEquals(0, tieredSpilloverCache.count());
+
+        tieredSpilloverCache.put(key, value);
+        // Put another key/value so that one of the item is evicted to disk cache.
+        String key2 = UUID.randomUUID().toString();
+        tieredSpilloverCache.put(key2, UUID.randomUUID().toString());
+        assertEquals(2, tieredSpilloverCache.count());
+        // Again invalidate older key
+        tieredSpilloverCache.invalidate(key);
+        assertEquals(1, eventListener.enumMap.get(CacheStoreType.DISK).invalidationMetric.count());
+        assertEquals(1, tieredSpilloverCache.count());
+    }
+
+    public void testCacheKeys() throws Exception {
+        int onHeapCacheSize = randomIntBetween(10, 30);
+        int diskCacheSize = randomIntBetween(60, 100);
+        int totalSize = onHeapCacheSize + diskCacheSize;
+
+        MockCacheEventListener<String, String> eventListener = new MockCacheEventListener<>();
+        TieredSpilloverCache<String, String> tieredSpilloverCache = intializeTieredSpilloverCache(
+            onHeapCacheSize,
+            diskCacheSize,
+            eventListener,
+            0
+        );
+        List<String> onHeapKeys = new ArrayList<>();
+        List<String> diskTierKeys = new ArrayList<>();
+        // During first round add onHeapCacheSize entries. Will go to onHeap cache initially.
+        for (int i = 0; i < onHeapCacheSize; i++) {
+            String key = UUID.randomUUID().toString();
+            diskTierKeys.add(key);
+            tieredSpilloverCache.computeIfAbsent(key, getLoadAwareCacheLoader());
+        }
+        // In another round, add another onHeapCacheSize entries. These will go to onHeap and above ones will be
+        // evicted to onDisk cache.
+        for (int i = 0; i < onHeapCacheSize; i++) {
+            String key = UUID.randomUUID().toString();
+            onHeapKeys.add(key);
+            tieredSpilloverCache.computeIfAbsent(key, getLoadAwareCacheLoader());
+        }
+
+        List<String> actualOnHeapKeys = new ArrayList<>();
+        List<String> actualOnDiskKeys = new ArrayList<>();
+        Iterable<String> onHeapiterable = tieredSpilloverCache.getOnHeapCache().keys();
+        Iterable<String> onDiskiterable = tieredSpilloverCache.getOnDiskCache().get().keys();
+        onHeapiterable.iterator().forEachRemaining(actualOnHeapKeys::add);
+        onDiskiterable.iterator().forEachRemaining(actualOnDiskKeys::add);
+        for (String onHeapKey : onHeapKeys) {
+            assertTrue(actualOnHeapKeys.contains(onHeapKey));
+        }
+        for (String onDiskKey : actualOnDiskKeys) {
+            assertTrue(actualOnDiskKeys.contains(onDiskKey));
+        }
+
+        // Testing keys() which returns all keys.
+        List<String> actualMergedKeys = new ArrayList<>();
+        List<String> expectedMergedKeys = new ArrayList<>();
+        expectedMergedKeys.addAll(onHeapKeys);
+        expectedMergedKeys.addAll(diskTierKeys);
+
+        Iterable<String> mergedIterable = tieredSpilloverCache.keys();
+        mergedIterable.iterator().forEachRemaining(actualMergedKeys::add);
+
+        assertEquals(expectedMergedKeys.size(), actualMergedKeys.size());
+        for (String key : expectedMergedKeys) {
+            assertTrue(actualMergedKeys.contains(key));
+        }
+    }
+
+    public void testRefresh() {
+        int onHeapCacheSize = randomIntBetween(10, 30);
+        int diskCacheSize = randomIntBetween(60, 100);
+
+        MockCacheEventListener<String, String> eventListener = new MockCacheEventListener<>();
+        TieredSpilloverCache<String, String> tieredSpilloverCache = intializeTieredSpilloverCache(
+            onHeapCacheSize,
+            diskCacheSize,
+            eventListener,
+            0
+        );
+        tieredSpilloverCache.refresh();
+    }
+
+    public void testInvalidateAll() throws Exception {
+        int onHeapCacheSize = randomIntBetween(10, 30);
+        int diskCacheSize = randomIntBetween(60, 100);
+        int totalSize = onHeapCacheSize + diskCacheSize;
+
+        MockCacheEventListener<String, String> eventListener = new MockCacheEventListener<>();
+        TieredSpilloverCache<String, String> tieredSpilloverCache = intializeTieredSpilloverCache(
+            onHeapCacheSize,
+            diskCacheSize,
+            eventListener,
+            0
+        );
+        // Put values in cache more than it's size and cause evictions from onHeap.
+        int numOfItems1 = randomIntBetween(onHeapCacheSize + 1, totalSize);
+        List<String> onHeapKeys = new ArrayList<>();
+        List<String> diskTierKeys = new ArrayList<>();
+        for (int iter = 0; iter < numOfItems1; iter++) {
+            String key = UUID.randomUUID().toString();
+            if (iter > (onHeapCacheSize - 1)) {
+                // All these are bound to go to disk based cache.
+                diskTierKeys.add(key);
+            } else {
+                onHeapKeys.add(key);
+            }
+            LoadAwareCacheLoader<String, String> tieredCacheLoader = getLoadAwareCacheLoader();
+            tieredSpilloverCache.computeIfAbsent(key, tieredCacheLoader);
+        }
+        assertEquals(numOfItems1, tieredSpilloverCache.count());
+        tieredSpilloverCache.invalidateAll();
+        assertEquals(0, tieredSpilloverCache.count());
+    }
+
+    public void testComputeIfAbsentConcurrently() throws Exception {
+        int onHeapCacheSize = randomIntBetween(100, 300);
+        int diskCacheSize = randomIntBetween(200, 400);
+
+        MockCacheEventListener<String, String> eventListener = new MockCacheEventListener<>();
+
+        TieredSpilloverCache<String, String> tieredSpilloverCache = intializeTieredSpilloverCache(
+            onHeapCacheSize,
+            diskCacheSize,
+            eventListener,
+            0
+        );
+
+        int numberOfSameKeys = randomIntBetween(10, onHeapCacheSize - 1);
+        String key = UUID.randomUUID().toString();
+        String value = UUID.randomUUID().toString();
+
+        Thread[] threads = new Thread[numberOfSameKeys];
+        Phaser phaser = new Phaser(numberOfSameKeys + 1);
+        CountDownLatch countDownLatch = new CountDownLatch(numberOfSameKeys); // To wait for all threads to finish.
+
+        List<LoadAwareCacheLoader<String, String>> loadAwareCacheLoaderList = new CopyOnWriteArrayList<>();
+
+        for (int i = 0; i < numberOfSameKeys; i++) {
+            threads[i] = new Thread(() -> {
+                try {
+                    LoadAwareCacheLoader<String, String> loadAwareCacheLoader = new LoadAwareCacheLoader() {
+                        boolean isLoaded = false;
+
+                        @Override
+                        public boolean isLoaded() {
+                            return isLoaded;
+                        }
+
+                        @Override
+                        public Object load(Object key) throws Exception {
+                            isLoaded = true;
+                            return value;
+                        }
+                    };
+                    loadAwareCacheLoaderList.add(loadAwareCacheLoader);
+                    phaser.arriveAndAwaitAdvance();
+                    tieredSpilloverCache.computeIfAbsent(key, loadAwareCacheLoader);
+                } catch (Exception e) {
+                    throw new RuntimeException(e);
+                }
+                countDownLatch.countDown();
+            });
+            threads[i].start();
+        }
+        phaser.arriveAndAwaitAdvance();
+        countDownLatch.await(); // Wait for rest of tasks to be cancelled.
+        int numberOfTimesKeyLoaded = 0;
+        assertEquals(numberOfSameKeys, loadAwareCacheLoaderList.size());
+        for (int i = 0; i < loadAwareCacheLoaderList.size(); i++) {
+            LoadAwareCacheLoader<String, String> loader = loadAwareCacheLoaderList.get(i);
+            if (loader.isLoaded()) {
+                numberOfTimesKeyLoaded++;
+            }
+        }
+        assertEquals(1, numberOfTimesKeyLoaded); // It should be loaded only once.
+    }
+
+    public void testConcurrencyForEvictionFlow() throws Exception {
+        int diskCacheSize = randomIntBetween(450, 800);
+
+        MockCacheEventListener<String, String> eventListener = new MockCacheEventListener<>();
+
+        StoreAwareCacheBuilder<String, String> cacheBuilder = new OpenSearchOnHeapCache.Builder<String, String>().setMaximumWeightInBytes(
+            200
+        ).setWeigher((k, v) -> 150);
+
+        StoreAwareCacheBuilder<String, String> diskCacheBuilder = new MockOnDiskCache.Builder<String, String>().setMaxSize(diskCacheSize)
+            .setDeliberateDelay(500);
+
+        TieredSpilloverCache<String, String> tieredSpilloverCache = new TieredSpilloverCache.Builder<String, String>()
+            .setOnHeapCacheBuilder(cacheBuilder)
+            .setOnDiskCacheBuilder(diskCacheBuilder)
+            .setListener(eventListener)
+            .build();
+
+        String keyToBeEvicted = "key1";
+        String secondKey = "key2";
+
+        // Put first key on tiered cache. Will go into onHeap cache.
+        tieredSpilloverCache.computeIfAbsent(keyToBeEvicted, new LoadAwareCacheLoader<>() {
+            @Override
+            public boolean isLoaded() {
+                return false;
+            }
+
+            @Override
+            public String load(String key) {
+                return UUID.randomUUID().toString();
+            }
+        });
+        CountDownLatch countDownLatch = new CountDownLatch(1);
+        CountDownLatch countDownLatch1 = new CountDownLatch(1);
+        // Put second key on tiered cache. Will cause eviction of first key from onHeap cache and should go into
+        // disk cache.
+        LoadAwareCacheLoader<String, String> loadAwareCacheLoader = getLoadAwareCacheLoader();
+        Thread thread = new Thread(() -> {
+            try {
+                tieredSpilloverCache.computeIfAbsent(secondKey, loadAwareCacheLoader);
+                countDownLatch1.countDown();
+            } catch (Exception e) {
+                throw new RuntimeException(e);
+            }
+        });
+        thread.start();
+        assertBusy(() -> { assertTrue(loadAwareCacheLoader.isLoaded()); }, 100, TimeUnit.MILLISECONDS); // We wait for new key to be loaded
+                                                                                                        // after which it eviction flow is
+        // guaranteed to occur.
+        StoreAwareCache<String, String> onDiskCache = tieredSpilloverCache.getOnDiskCache().get();
+
+        // Now on a different thread, try to get key(above one which got evicted) from tiered cache. We expect this
+        // should return not null value as it should be present on diskCache.
+        AtomicReference<String> actualValue = new AtomicReference<>();
+        Thread thread1 = new Thread(() -> {
+            try {
+                actualValue.set(tieredSpilloverCache.get(keyToBeEvicted));
+            } catch (Exception e) {
+                throw new RuntimeException(e);
+            }
+            countDownLatch.countDown();
+        });
+        thread1.start();
+        countDownLatch.await();
+        assertNotNull(actualValue.get());
+        countDownLatch1.await();
+        assertEquals(1, eventListener.enumMap.get(CacheStoreType.ON_HEAP).evictionsMetric.count());
+        assertEquals(1, tieredSpilloverCache.getOnHeapCache().count());
+        assertEquals(1, onDiskCache.count());
+        assertNotNull(onDiskCache.get(keyToBeEvicted));
+    }
+
+    class MockCacheEventListener<K, V> implements StoreAwareCacheEventListener<K, V> {
+
+        EnumMap<CacheStoreType, TestStatsHolder> enumMap = new EnumMap<>(CacheStoreType.class);
+
+        MockCacheEventListener() {
+            for (CacheStoreType cacheStoreType : CacheStoreType.values()) {
+                enumMap.put(cacheStoreType, new TestStatsHolder());
+            }
+        }
+
+        @Override
+        public void onMiss(K key, CacheStoreType cacheStoreType) {
+            enumMap.get(cacheStoreType).missCount.inc();
+        }
+
+        @Override
+        public void onRemoval(StoreAwareCacheRemovalNotification<K, V> notification) {
+            if (notification.getRemovalReason().equals(RemovalReason.EVICTED)) {
+                enumMap.get(notification.getCacheStoreType()).evictionsMetric.inc();
+            } else if (notification.getRemovalReason().equals(RemovalReason.INVALIDATED)) {
+                enumMap.get(notification.getCacheStoreType()).invalidationMetric.inc();
+            }
+        }
+
+        @Override
+        public void onHit(K key, V value, CacheStoreType cacheStoreType) {
+            enumMap.get(cacheStoreType).hitCount.inc();
+        }
+
+        @Override
+        public void onCached(K key, V value, CacheStoreType cacheStoreType) {
+            enumMap.get(cacheStoreType).cachedCount.inc();
+        }
+
+        class TestStatsHolder {
+            final CounterMetric evictionsMetric = new CounterMetric();
+            final CounterMetric hitCount = new CounterMetric();
+            final CounterMetric missCount = new CounterMetric();
+            final CounterMetric cachedCount = new CounterMetric();
+            final CounterMetric invalidationMetric = new CounterMetric();
+        }
+    }
+
+    private LoadAwareCacheLoader<String, String> getLoadAwareCacheLoader() {
+        return new LoadAwareCacheLoader<String, String>() {
+            boolean isLoaded = false;
+
+            @Override
+            public String load(String key) {
+                isLoaded = true;
+                return UUID.randomUUID().toString();
+            }
+
+            @Override
+            public boolean isLoaded() {
+                return isLoaded;
+            }
+        };
+    }
+
+    private TieredSpilloverCache<String, String> intializeTieredSpilloverCache(
+        int onHeapCacheSize,
+        int diksCacheSize,
+        StoreAwareCacheEventListener<String, String> eventListener,
+        long diskDeliberateDelay
+    ) {
+        StoreAwareCacheBuilder<String, String> diskCacheBuilder = new MockOnDiskCache.Builder<String, String>().setMaxSize(diksCacheSize)
+            .setDeliberateDelay(diskDeliberateDelay);
+        StoreAwareCacheBuilder<String, String> onHeapCacheBuilder = new OpenSearchOnHeapCache.Builder<String, String>()
+            .setMaximumWeightInBytes(onHeapCacheSize * 20)
+            .setWeigher((k, v) -> 20); // Will support upto onHeapCacheSize entries
+        return new TieredSpilloverCache.Builder<String, String>().setOnHeapCacheBuilder(onHeapCacheBuilder)
+            .setOnDiskCacheBuilder(diskCacheBuilder)
+            .setListener(eventListener)
+            .build();
+    }
+}
+
+class MockOnDiskCache<K, V> implements StoreAwareCache<K, V> {
+
+    Map<K, V> cache;
+    int maxSize;
+
+    long delay;
+    StoreAwareCacheEventListener<K, V> eventListener;
+
+    MockOnDiskCache(int maxSize, StoreAwareCacheEventListener<K, V> eventListener, long delay) {
+        this.maxSize = maxSize;
+        this.eventListener = eventListener;
+        this.delay = delay;
+        this.cache = new ConcurrentHashMap<K, V>();
+    }
+
+    @Override
+    public V get(K key) {
+        V value = cache.get(key);
+        if (value != null) {
+            eventListener.onHit(key, value, CacheStoreType.DISK);
+        } else {
+            eventListener.onMiss(key, CacheStoreType.DISK);
+        }
+        return value;
+    }
+
+    @Override
+    public void put(K key, V value) {
+        if (this.cache.size() >= maxSize) { // For simplification
+            eventListener.onRemoval(new StoreAwareCacheRemovalNotification<>(key, value, RemovalReason.EVICTED, CacheStoreType.DISK));
+            return;
+        }
+        try {
+            Thread.sleep(delay);
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+        this.cache.put(key, value);
+        eventListener.onCached(key, value, CacheStoreType.DISK);
+    }
+
+    @Override
+    public V computeIfAbsent(K key, LoadAwareCacheLoader<K, V> loader) throws Exception {
+        V value = cache.computeIfAbsent(key, key1 -> {
+            try {
+                return loader.load(key);
+            } catch (Exception e) {
+                throw new RuntimeException(e);
+            }
+        });
+        if (!loader.isLoaded()) {
+            eventListener.onHit(key, value, CacheStoreType.DISK);
+        } else {
+            eventListener.onMiss(key, CacheStoreType.DISK);
+            eventListener.onCached(key, value, CacheStoreType.DISK);
+        }
+        return value;
+    }
+
+    @Override
+    public void invalidate(K key) {
+        if (this.cache.containsKey(key)) {
+            eventListener.onRemoval(new StoreAwareCacheRemovalNotification<>(key, null, RemovalReason.INVALIDATED, CacheStoreType.DISK));
+        }
+        this.cache.remove(key);
+    }
+
+    @Override
+    public void invalidateAll() {
+        this.cache.clear();
+    }
+
+    @Override
+    public Iterable<K> keys() {
+        return this.cache.keySet();
+    }
+
+    @Override
+    public long count() {
+        return this.cache.size();
+    }
+
+    @Override
+    public void refresh() {}
+
+    @Override
+    public CacheStoreType getTierType() {
+        return CacheStoreType.DISK;
+    }
+
+    public static class Builder<K, V> extends StoreAwareCacheBuilder<K, V> {
+
+        int maxSize;
+        long delay;
+
+        @Override
+        public StoreAwareCache<K, V> build() {
+            return new MockOnDiskCache<K, V>(maxSize, this.getEventListener(), delay);
+        }
+
+        public Builder<K, V> setMaxSize(int maxSize) {
+            this.maxSize = maxSize;
+            return this;
+        }
+
+        public Builder<K, V> setDeliberateDelay(long millis) {
+            this.delay = millis;
+            return this;
+        }
+    }
+}
diff --git a/server/src/test/java/org/opensearch/common/util/concurrent/ThreadContextTests.java b/server/src/test/java/org/opensearch/common/util/concurrent/ThreadContextTests.java
index a0531c76bf897..10669ca1a805b 100644
--- a/server/src/test/java/org/opensearch/common/util/concurrent/ThreadContextTests.java
+++ b/server/src/test/java/org/opensearch/common/util/concurrent/ThreadContextTests.java
@@ -44,6 +44,8 @@
 import java.util.Map;
 import java.util.function.Supplier;
 
+import org.mockito.Mockito;
+
 import static org.opensearch.tasks.TaskResourceTrackingService.TASK_ID;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.hasItem;
@@ -740,6 +742,71 @@ public void testMarkAsSystemContext() throws IOException {
         assertFalse(threadContext.isSystemContext());
     }
 
+    public void testSystemContextWithPropagator() {
+        Settings build = Settings.builder().put("request.headers.default", "1").build();
+        Map<String, Object> transientHeaderMap = Collections.singletonMap("test_transient_propagation_key", "test");
+        Map<String, Object> transientHeaderTransformedMap = Collections.singletonMap("test_transient_propagation_key", "test");
+        Map<String, Object> headerMap = Collections.singletonMap("test_transient_propagation_key", "test");
+        Map<String, String> headerTransformedMap = Collections.singletonMap("test_transient_propagation_key", "test");
+        ThreadContext threadContext = new ThreadContext(build);
+        ThreadContextStatePropagator mockPropagator = Mockito.mock(ThreadContextStatePropagator.class);
+        Mockito.when(mockPropagator.transients(transientHeaderMap, true)).thenReturn(Collections.emptyMap());
+        Mockito.when(mockPropagator.transients(transientHeaderMap, false)).thenReturn(transientHeaderTransformedMap);
+
+        Mockito.when(mockPropagator.headers(headerMap, true)).thenReturn(headerTransformedMap);
+        Mockito.when(mockPropagator.headers(headerMap, false)).thenReturn(headerTransformedMap);
+        threadContext.registerThreadContextStatePropagator(mockPropagator);
+        threadContext.putHeader("foo", "bar");
+        threadContext.putTransient("test_transient_propagation_key", 1);
+        assertEquals(Integer.valueOf(1), threadContext.getTransient("test_transient_propagation_key"));
+        assertEquals("bar", threadContext.getHeader("foo"));
+        try (ThreadContext.StoredContext ctx = threadContext.stashContext()) {
+            threadContext.markAsSystemContext();
+            assertNull(threadContext.getHeader("foo"));
+            assertNull(threadContext.getTransient("test_transient_propagation_key"));
+            assertEquals("1", threadContext.getHeader("default"));
+        }
+
+        assertEquals("bar", threadContext.getHeader("foo"));
+        assertEquals(Integer.valueOf(1), threadContext.getTransient("test_transient_propagation_key"));
+        assertEquals("1", threadContext.getHeader("default"));
+    }
+
+    public void testSerializeSystemContext() throws IOException {
+        Settings build = Settings.builder().put("request.headers.default", "1").build();
+        Map<String, Object> transientHeaderMap = Collections.singletonMap("test_transient_propagation_key", "test");
+        Map<String, Object> transientHeaderTransformedMap = Collections.singletonMap("test_transient_propagation_key", "test");
+        Map<String, Object> headerMap = Collections.singletonMap("test_transient_propagation_key", "test");
+        Map<String, String> headerTransformedMap = Collections.singletonMap("test_transient_propagation_key", "test");
+        ThreadContext threadContext = new ThreadContext(build);
+        ThreadContextStatePropagator mockPropagator = Mockito.mock(ThreadContextStatePropagator.class);
+        Mockito.when(mockPropagator.transients(transientHeaderMap, true)).thenReturn(Collections.emptyMap());
+        Mockito.when(mockPropagator.transients(transientHeaderMap, false)).thenReturn(transientHeaderTransformedMap);
+
+        Mockito.when(mockPropagator.headers(headerMap, true)).thenReturn(headerTransformedMap);
+        Mockito.when(mockPropagator.headers(headerMap, false)).thenReturn(headerTransformedMap);
+        threadContext.registerThreadContextStatePropagator(mockPropagator);
+        threadContext.putHeader("foo", "bar");
+        threadContext.putTransient("test_transient_propagation_key", "test");
+        BytesStreamOutput out = new BytesStreamOutput();
+        BytesStreamOutput outFromSystemContext = new BytesStreamOutput();
+        threadContext.writeTo(out);
+        try (ThreadContext.StoredContext ctx = threadContext.stashContext()) {
+            assertEquals("test", threadContext.getTransient("test_transient_propagation_key"));
+            threadContext.markAsSystemContext();
+            threadContext.writeTo(outFromSystemContext);
+            assertNull(threadContext.getHeader("foo"));
+            assertNull(threadContext.getTransient("test_transient_propagation_key"));
+            threadContext.readHeaders(outFromSystemContext.bytes().streamInput());
+            assertNull(threadContext.getHeader("test_transient_propagation_key"));
+        }
+        assertEquals("test", threadContext.getTransient("test_transient_propagation_key"));
+        threadContext.readHeaders(out.bytes().streamInput());
+        assertEquals("bar", threadContext.getHeader("foo"));
+        assertEquals("test", threadContext.getHeader("test_transient_propagation_key"));
+        assertEquals("1", threadContext.getHeader("default"));
+    }
+
     public void testPutHeaders() {
         Settings build = Settings.builder().put("request.headers.default", "1").build();
         ThreadContext threadContext = new ThreadContext(build);
diff --git a/server/src/test/java/org/opensearch/index/codec/CodecTests.java b/server/src/test/java/org/opensearch/index/codec/CodecTests.java
index 6f9ff78aa0143..b31edd79411d0 100644
--- a/server/src/test/java/org/opensearch/index/codec/CodecTests.java
+++ b/server/src/test/java/org/opensearch/index/codec/CodecTests.java
@@ -35,7 +35,7 @@
 import org.apache.logging.log4j.LogManager;
 import org.apache.lucene.codecs.Codec;
 import org.apache.lucene.codecs.lucene90.Lucene90StoredFieldsFormat;
-import org.apache.lucene.codecs.lucene95.Lucene95Codec;
+import org.apache.lucene.codecs.lucene99.Lucene99Codec;
 import org.apache.lucene.document.Document;
 import org.apache.lucene.index.DirectoryReader;
 import org.apache.lucene.index.IndexWriter;
@@ -68,28 +68,28 @@ public class CodecTests extends OpenSearchTestCase {
     public void testResolveDefaultCodecs() throws Exception {
         CodecService codecService = createCodecService(false);
         assertThat(codecService.codec("default"), instanceOf(PerFieldMappingPostingFormatCodec.class));
-        assertThat(codecService.codec("default"), instanceOf(Lucene95Codec.class));
+        assertThat(codecService.codec("default"), instanceOf(Lucene99Codec.class));
     }
 
     public void testDefault() throws Exception {
         Codec codec = createCodecService(false).codec("default");
-        assertStoredFieldsCompressionEquals(Lucene95Codec.Mode.BEST_SPEED, codec);
+        assertStoredFieldsCompressionEquals(Lucene99Codec.Mode.BEST_SPEED, codec);
     }
 
     public void testBestCompression() throws Exception {
         Codec codec = createCodecService(false).codec("best_compression");
-        assertStoredFieldsCompressionEquals(Lucene95Codec.Mode.BEST_COMPRESSION, codec);
+        assertStoredFieldsCompressionEquals(Lucene99Codec.Mode.BEST_COMPRESSION, codec);
     }
 
     public void testLZ4() throws Exception {
         Codec codec = createCodecService(false).codec("lz4");
-        assertStoredFieldsCompressionEquals(Lucene95Codec.Mode.BEST_SPEED, codec);
+        assertStoredFieldsCompressionEquals(Lucene99Codec.Mode.BEST_SPEED, codec);
         assert codec instanceof PerFieldMappingPostingFormatCodec;
     }
 
     public void testZlib() throws Exception {
         Codec codec = createCodecService(false).codec("zlib");
-        assertStoredFieldsCompressionEquals(Lucene95Codec.Mode.BEST_COMPRESSION, codec);
+        assertStoredFieldsCompressionEquals(Lucene99Codec.Mode.BEST_COMPRESSION, codec);
         assert codec instanceof PerFieldMappingPostingFormatCodec;
     }
 
@@ -125,12 +125,12 @@ public void testLuceneCodecsWithCompressionLevel() {
 
     public void testDefaultMapperServiceNull() throws Exception {
         Codec codec = createCodecService(true).codec("default");
-        assertStoredFieldsCompressionEquals(Lucene95Codec.Mode.BEST_SPEED, codec);
+        assertStoredFieldsCompressionEquals(Lucene99Codec.Mode.BEST_SPEED, codec);
     }
 
     public void testBestCompressionMapperServiceNull() throws Exception {
         Codec codec = createCodecService(true).codec("best_compression");
-        assertStoredFieldsCompressionEquals(Lucene95Codec.Mode.BEST_COMPRESSION, codec);
+        assertStoredFieldsCompressionEquals(Lucene99Codec.Mode.BEST_COMPRESSION, codec);
     }
 
     public void testExceptionCodecNull() {
@@ -142,11 +142,11 @@ public void testExceptionIndexSettingsNull() {
     }
 
     // write some docs with it, inspect .si to see this was the used compression
-    private void assertStoredFieldsCompressionEquals(Lucene95Codec.Mode expected, Codec actual) throws Exception {
+    private void assertStoredFieldsCompressionEquals(Lucene99Codec.Mode expected, Codec actual) throws Exception {
         SegmentReader sr = getSegmentReader(actual);
         String v = sr.getSegmentInfo().info.getAttribute(Lucene90StoredFieldsFormat.MODE_KEY);
         assertNotNull(v);
-        assertEquals(expected, Lucene95Codec.Mode.valueOf(v));
+        assertEquals(expected, Lucene99Codec.Mode.valueOf(v));
     }
 
     private CodecService createCodecService(boolean isMapperServiceNull) throws IOException {
diff --git a/server/src/test/java/org/opensearch/index/engine/CompletionStatsCacheTests.java b/server/src/test/java/org/opensearch/index/engine/CompletionStatsCacheTests.java
index b746d0ba8a56d..0c87c384e0749 100644
--- a/server/src/test/java/org/opensearch/index/engine/CompletionStatsCacheTests.java
+++ b/server/src/test/java/org/opensearch/index/engine/CompletionStatsCacheTests.java
@@ -32,14 +32,14 @@
 package org.opensearch.index.engine;
 
 import org.apache.lucene.codecs.PostingsFormat;
-import org.apache.lucene.codecs.lucene95.Lucene95Codec;
+import org.apache.lucene.codecs.lucene99.Lucene99Codec;
 import org.apache.lucene.document.Document;
 import org.apache.lucene.index.DirectoryReader;
 import org.apache.lucene.index.IndexWriter;
 import org.apache.lucene.index.IndexWriterConfig;
 import org.apache.lucene.search.Query;
 import org.apache.lucene.search.QueryCachingPolicy;
-import org.apache.lucene.search.suggest.document.Completion90PostingsFormat;
+import org.apache.lucene.search.suggest.document.Completion99PostingsFormat;
 import org.apache.lucene.search.suggest.document.SuggestField;
 import org.apache.lucene.store.Directory;
 import org.opensearch.OpenSearchException;
@@ -69,8 +69,8 @@ public void testExceptionsAreNotCached() {
 
     public void testCompletionStatsCache() throws IOException, InterruptedException {
         final IndexWriterConfig indexWriterConfig = newIndexWriterConfig();
-        final PostingsFormat postingsFormat = new Completion90PostingsFormat();
-        indexWriterConfig.setCodec(new Lucene95Codec() {
+        final PostingsFormat postingsFormat = new Completion99PostingsFormat();
+        indexWriterConfig.setCodec(new Lucene99Codec() {
             @Override
             public PostingsFormat getPostingsFormatForField(String field) {
                 return postingsFormat; // all fields are suggest fields
diff --git a/server/src/test/java/org/opensearch/index/mapper/RangeFieldTypeTests.java b/server/src/test/java/org/opensearch/index/mapper/RangeFieldTypeTests.java
index 755d77c6ae392..00b48240d0567 100644
--- a/server/src/test/java/org/opensearch/index/mapper/RangeFieldTypeTests.java
+++ b/server/src/test/java/org/opensearch/index/mapper/RangeFieldTypeTests.java
@@ -277,12 +277,12 @@ public void testDateRangeQueryUsingMappingFormat() {
 
         RangeFieldType fieldType = new RangeFieldType("field", formatter);
         final Query query = fieldType.rangeQuery(from, to, true, true, relation, null, fieldType.dateMathParser(), context);
-        assertEquals("field:<ranges:[1465975790000 : 1466062190999]>", query.toString());
+        assertEquals("field:<ranges:[1465975790000 : 1466062190999]>", ((IndexOrDocValuesQuery) query).getIndexQuery().toString());
 
         // compare lower and upper bounds with what we would get on a `date` field
         DateFieldType dateFieldType = new DateFieldType("field", DateFieldMapper.Resolution.MILLISECONDS, formatter);
         final Query queryOnDateField = dateFieldType.rangeQuery(from, to, true, true, relation, null, fieldType.dateMathParser(), context);
-        assertEquals("field:[1465975790000 TO 1466062190999]", queryOnDateField.toString());
+        assertEquals("field:[1465975790000 TO 1466062190999]", ((IndexOrDocValuesQuery) queryOnDateField).getIndexQuery().toString());
     }
 
     /**
diff --git a/server/src/test/java/org/opensearch/index/query/GeoDistanceQueryBuilderTests.java b/server/src/test/java/org/opensearch/index/query/GeoDistanceQueryBuilderTests.java
index 1b62fef30d255..0dfe47e83fedc 100644
--- a/server/src/test/java/org/opensearch/index/query/GeoDistanceQueryBuilderTests.java
+++ b/server/src/test/java/org/opensearch/index/query/GeoDistanceQueryBuilderTests.java
@@ -358,7 +358,10 @@ private void assertGeoDistanceRangeQuery(String query, double lat, double lon, d
         Query parsedQuery = parseQuery(query).toQuery(createShardContext());
         // The parsedQuery contains IndexOrDocValuesQuery, which wraps LatLonPointDistanceQuery which in turn has default visibility,
         // so we cannot access its fields directly to check and have to use toString() here instead.
-        assertEquals(parsedQuery.toString(), "mapped_geo_point:" + lat + "," + lon + " +/- " + distanceUnit.toMeters(distance) + " meters");
+        assertEquals(
+            ((IndexOrDocValuesQuery) parsedQuery).getIndexQuery().toString(),
+            "mapped_geo_point:" + lat + "," + lon + " +/- " + distanceUnit.toMeters(distance) + " meters"
+        );
     }
 
     public void testFromJson() throws IOException {
diff --git a/server/src/test/java/org/opensearch/index/shard/RemoteIndexShardTests.java b/server/src/test/java/org/opensearch/index/shard/RemoteIndexShardTests.java
index dd92bfb47afdb..57a561bc8f2a3 100644
--- a/server/src/test/java/org/opensearch/index/shard/RemoteIndexShardTests.java
+++ b/server/src/test/java/org/opensearch/index/shard/RemoteIndexShardTests.java
@@ -11,6 +11,7 @@
 import org.apache.lucene.index.IndexFileNames;
 import org.apache.lucene.index.SegmentInfos;
 import org.apache.lucene.util.Version;
+import org.opensearch.action.StepListener;
 import org.opensearch.cluster.metadata.IndexMetadata;
 import org.opensearch.common.concurrent.GatedCloseable;
 import org.opensearch.common.settings.Settings;
@@ -371,7 +372,6 @@ public void testPrimaryRestart() throws Exception {
      * prevent FileAlreadyExistsException. It does so by only copying files in first round of segment replication without
      * committing locally so that in next round of segment replication those files are not considered for download again
      */
-    @AwaitsFix(bugUrl = "https://github.com/opensearch-project/OpenSearch/issues/10885")
     public void testSegRepSucceedsOnPreviousCopiedFiles() throws Exception {
         try (ReplicationGroup shards = createGroup(1, getIndexSettings(), new NRTReplicationEngineFactory())) {
             shards.startAll();
@@ -388,6 +388,7 @@ public void testSegRepSucceedsOnPreviousCopiedFiles() throws Exception {
             );
             CountDownLatch latch = new CountDownLatch(1);
 
+            logger.info("--> Starting first round of replication");
             // Start first round of segment replication. This should fail with simulated error but with replica having
             // files in its local store but not in active reader.
             final SegmentReplicationTarget target = targetService.startReplication(
@@ -427,6 +428,7 @@ public void onReplicationFailure(
             // Start next round of segment replication and not throwing exception resulting in commit on replica
             when(sourceFactory.get(any())).thenReturn(getRemoteStoreReplicationSource(replica, () -> {}));
             CountDownLatch waitForSecondRound = new CountDownLatch(1);
+            logger.info("--> Starting second round of replication");
             final SegmentReplicationTarget newTarget = targetService.startReplication(
                 replica,
                 primary.getLatestReplicationCheckpoint(),
@@ -463,7 +465,6 @@ public void onReplicationFailure(
      * blocking update of reader. Once this is done, it corrupts one segment file and ensure that file is deleted in next
      * round of segment replication by ensuring doc count.
      */
-    @AwaitsFix(bugUrl = "https://github.com/opensearch-project/OpenSearch/issues/10885")
     public void testNoFailuresOnFileReads() throws Exception {
         try (ReplicationGroup shards = createGroup(1, getIndexSettings(), new NRTReplicationEngineFactory())) {
             shards.startAll();
@@ -560,8 +561,19 @@ public void getSegmentFiles(
                 BiConsumer<String, Long> fileProgressTracker,
                 ActionListener<GetSegmentFilesResponse> listener
             ) {
-                super.getSegmentFiles(replicationId, checkpoint, filesToFetch, indexShard, (fileName, bytesRecovered) -> {}, listener);
-                postGetFilesRunnable.run();
+                StepListener<GetSegmentFilesResponse> waitForCopyFilesListener = new StepListener();
+                super.getSegmentFiles(
+                    replicationId,
+                    checkpoint,
+                    filesToFetch,
+                    indexShard,
+                    (fileName, bytesRecovered) -> {},
+                    waitForCopyFilesListener
+                );
+                waitForCopyFilesListener.whenComplete(response -> {
+                    postGetFilesRunnable.run();
+                    listener.onResponse(response);
+                }, listener::onFailure);
             }
 
             @Override
diff --git a/server/src/test/java/org/opensearch/ingest/IngestDocumentTests.java b/server/src/test/java/org/opensearch/ingest/IngestDocumentTests.java
index 8358dadf9cc3a..be035bc6ef7ea 100644
--- a/server/src/test/java/org/opensearch/ingest/IngestDocumentTests.java
+++ b/server/src/test/java/org/opensearch/ingest/IngestDocumentTests.java
@@ -95,6 +95,12 @@ public void setTestIngestDocument() {
         ingestDocument = new IngestDocument("index", "id", null, null, null, document);
     }
 
+    public void testSelfReferencingSource() {
+        Map<String, Object> value = new HashMap<>();
+        value.put("foo", value);
+        expectThrows(IllegalArgumentException.class, () -> IngestDocument.deepCopyMap(value));
+    }
+
     public void testSimpleGetFieldValue() {
         assertThat(ingestDocument.getFieldValue("foo", String.class), equalTo("bar"));
         assertThat(ingestDocument.getFieldValue("int", Integer.class), equalTo(123));
diff --git a/server/src/test/java/org/opensearch/search/aggregations/AggregationProcessorTests.java b/server/src/test/java/org/opensearch/search/aggregations/AggregationProcessorTests.java
index 1ae201666bc54..d68b0911d3d01 100644
--- a/server/src/test/java/org/opensearch/search/aggregations/AggregationProcessorTests.java
+++ b/server/src/test/java/org/opensearch/search/aggregations/AggregationProcessorTests.java
@@ -8,10 +8,13 @@
 
 package org.opensearch.search.aggregations;
 
+import org.apache.lucene.index.DirectoryReader;
+import org.apache.lucene.index.LeafReaderContext;
 import org.apache.lucene.search.Collector;
 import org.apache.lucene.search.CollectorManager;
 import org.apache.lucene.search.IndexSearcher;
 import org.apache.lucene.search.Query;
+import org.opensearch.index.engine.Engine;
 import org.opensearch.search.aggregations.bucket.global.GlobalAggregator;
 import org.opensearch.search.internal.ContextIndexSearcher;
 import org.opensearch.search.profile.query.CollectorResult;
@@ -20,14 +23,17 @@
 
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.List;
+import java.util.concurrent.ExecutorService;
 
 import org.mockito.ArgumentMatchers;
 
 import static org.mockito.ArgumentMatchers.nullable;
+import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
-import static org.mockito.Mockito.when;
 
 public class AggregationProcessorTests extends AggregationSetupTests {
     private final AggregationProcessor testAggregationProcessor = new ConcurrentAggregationProcessor();
@@ -152,9 +158,31 @@ private void testPostProcessCommon(
                 globalCollectors.add(context.queryCollectorManagers().get(GlobalAggCollectorManager.class).newCollector());
             }
         }
-        final ContextIndexSearcher testSearcher = mock(ContextIndexSearcher.class);
         final IndexSearcher.LeafSlice[] slicesToReturn = new IndexSearcher.LeafSlice[numSlices];
-        when(testSearcher.getSlices()).thenReturn(slicesToReturn);
+
+        // Build a ContextIndexSearcher that stubs slices to return slicesToReturn. Slices is protected in IndexReader
+        // so this builds a real object. The DirectoryReader fetched to build the object is not used for any searches.
+        final DirectoryReader reader;
+        try (Engine.Searcher searcher = context.indexShard().acquireSearcher("test")) {
+            reader = searcher.getDirectoryReader();
+        }
+        ContextIndexSearcher testSearcher = spy(
+            new ContextIndexSearcher(
+                reader,
+                IndexSearcher.getDefaultSimilarity(),
+                IndexSearcher.getDefaultQueryCache(),
+                IndexSearcher.getDefaultQueryCachingPolicy(),
+                randomBoolean(),
+                mock(ExecutorService.class),
+                context
+            ) {
+                @Override
+                protected LeafSlice[] slices(List<LeafReaderContext> leaves) {
+                    return slicesToReturn;
+                }
+            }
+        );
+
         ((TestSearchContext) context).setSearcher(testSearcher);
         AggregationCollectorManager collectorManager;
         if (expectedNonGlobalAggsPerSlice > 0) {
@@ -164,8 +192,8 @@ private void testPostProcessCommon(
         if (expectedGlobalAggs > 0) {
             collectorManager = (AggregationCollectorManager) context.queryCollectorManagers().get(GlobalAggCollectorManager.class);
             ReduceableSearchResult result = collectorManager.reduce(globalCollectors);
-            when(testSearcher.search(nullable(Query.class), ArgumentMatchers.<CollectorManager<?, ReduceableSearchResult>>any()))
-                .thenReturn(result);
+            doReturn(result).when(testSearcher)
+                .search(nullable(Query.class), ArgumentMatchers.<CollectorManager<?, ReduceableSearchResult>>any());
         }
         assertTrue(context.queryResult().hasAggs());
         if (withProfilers) {
diff --git a/server/src/test/java/org/opensearch/search/aggregations/metrics/InternalTopHitsTests.java b/server/src/test/java/org/opensearch/search/aggregations/metrics/InternalTopHitsTests.java
index 9358fa568db6a..01e259f84660d 100644
--- a/server/src/test/java/org/opensearch/search/aggregations/metrics/InternalTopHitsTests.java
+++ b/server/src/test/java/org/opensearch/search/aggregations/metrics/InternalTopHitsTests.java
@@ -35,6 +35,7 @@
 import org.apache.lucene.index.IndexWriter;
 import org.apache.lucene.search.FieldComparator;
 import org.apache.lucene.search.FieldDoc;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.ScoreDoc;
 import org.apache.lucene.search.SortField;
 import org.apache.lucene.search.TopDocs;
@@ -356,7 +357,7 @@ private Comparator<ScoreDoc> sortFieldsComparator(SortField[] sortFields) {
         FieldComparator[] comparators = new FieldComparator[sortFields.length];
         for (int i = 0; i < sortFields.length; i++) {
             // Values passed to getComparator shouldn't matter
-            comparators[i] = sortFields[i].getComparator(0, false);
+            comparators[i] = sortFields[i].getComparator(0, Pruning.NONE);
         }
         return (lhs, rhs) -> {
             FieldDoc l = (FieldDoc) lhs;
diff --git a/server/src/test/java/org/opensearch/search/internal/ContextIndexSearcherTests.java b/server/src/test/java/org/opensearch/search/internal/ContextIndexSearcherTests.java
index b1f70dfce176c..a707c8b34e0a4 100644
--- a/server/src/test/java/org/opensearch/search/internal/ContextIndexSearcherTests.java
+++ b/server/src/test/java/org/opensearch/search/internal/ContextIndexSearcherTests.java
@@ -393,8 +393,8 @@ public void testGetSlicesWithNonNullExecutorButCSDisabled() throws Exception {
                     null,
                     searchContext
                 );
-                // Case 1: Verify getSlices return null when concurrent segment search is disabled
-                assertNull(searcher.getSlices());
+                // Case 1: Verify getSlices returns not null when concurrent segment search is disabled
+                assertEquals(1, searcher.getSlices().length);
 
                 // Case 2: Verify the slice count when custom max slice computation is used
                 searcher = new ContextIndexSearcher(
diff --git a/server/src/test/java/org/opensearch/search/query/QueryPhaseTests.java b/server/src/test/java/org/opensearch/search/query/QueryPhaseTests.java
index 39126a607f968..d0e01c5461c79 100644
--- a/server/src/test/java/org/opensearch/search/query/QueryPhaseTests.java
+++ b/server/src/test/java/org/opensearch/search/query/QueryPhaseTests.java
@@ -69,6 +69,7 @@
 import org.apache.lucene.search.MatchNoDocsQuery;
 import org.apache.lucene.search.MultiTermQuery;
 import org.apache.lucene.search.PrefixQuery;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.Query;
 import org.apache.lucene.search.ScoreDoc;
 import org.apache.lucene.search.Sort;
@@ -659,7 +660,7 @@ public void testIndexSortScrollOptimization() throws Exception {
                 @SuppressWarnings("unchecked")
                 FieldComparator<Object> comparator = (FieldComparator<Object>) searchSortAndFormat.sort.getSort()[i].getComparator(
                     1,
-                    false
+                    Pruning.NONE
                 );
                 int cmp = comparator.compareValues(firstDoc.fields[i], lastDoc.fields[i]);
                 if (cmp == 0) {
diff --git a/server/src/test/java/org/opensearch/search/query/QueryProfilePhaseTests.java b/server/src/test/java/org/opensearch/search/query/QueryProfilePhaseTests.java
index 48ac2d3b5a804..6af04e15acef0 100644
--- a/server/src/test/java/org/opensearch/search/query/QueryProfilePhaseTests.java
+++ b/server/src/test/java/org/opensearch/search/query/QueryProfilePhaseTests.java
@@ -35,6 +35,7 @@
 import org.apache.lucene.search.LeafCollector;
 import org.apache.lucene.search.MatchAllDocsQuery;
 import org.apache.lucene.search.MatchNoDocsQuery;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.Query;
 import org.apache.lucene.search.Sort;
 import org.apache.lucene.search.SortField;
@@ -1086,7 +1087,7 @@ public void testIndexSortScrollOptimization() throws Exception {
                 @SuppressWarnings("unchecked")
                 FieldComparator<Object> comparator = (FieldComparator<Object>) searchSortAndFormat.sort.getSort()[i].getComparator(
                     i,
-                    randomBoolean()
+                    randomFrom(Pruning.values())
                 );
                 int cmp = comparator.compareValues(firstDoc.fields[i], lastDoc.fields[i]);
                 if (cmp == 0) {
diff --git a/server/src/test/java/org/opensearch/search/searchafter/SearchAfterBuilderTests.java b/server/src/test/java/org/opensearch/search/searchafter/SearchAfterBuilderTests.java
index cc5c205f7f9fe..53c07674f5bd7 100644
--- a/server/src/test/java/org/opensearch/search/searchafter/SearchAfterBuilderTests.java
+++ b/server/src/test/java/org/opensearch/search/searchafter/SearchAfterBuilderTests.java
@@ -34,6 +34,7 @@
 
 import org.apache.lucene.document.LatLonDocValuesField;
 import org.apache.lucene.search.FieldComparator;
+import org.apache.lucene.search.Pruning;
 import org.apache.lucene.search.SortField;
 import org.apache.lucene.search.SortedNumericSortField;
 import org.apache.lucene.search.SortedSetSortField;
@@ -279,7 +280,7 @@ public SortField.Type reducedType() {
             }
 
             @Override
-            public FieldComparator<?> newComparator(String fieldname, int numHits, boolean enableSkipping, boolean reversed) {
+            public FieldComparator<?> newComparator(String fieldname, int numHits, Pruning pruning, boolean reversed) {
                 return null;
             }
 
diff --git a/server/src/test/java/org/opensearch/tasks/TaskThreadContextStatePropagatorTests.java b/server/src/test/java/org/opensearch/tasks/TaskThreadContextStatePropagatorTests.java
new file mode 100644
index 0000000000000..bfa0d566aabd7
--- /dev/null
+++ b/server/src/test/java/org/opensearch/tasks/TaskThreadContextStatePropagatorTests.java
@@ -0,0 +1,34 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.tasks;
+
+import org.opensearch.test.OpenSearchTestCase;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.opensearch.tasks.TaskResourceTrackingService.TASK_ID;
+
+public class TaskThreadContextStatePropagatorTests extends OpenSearchTestCase {
+    private final TaskThreadContextStatePropagator taskThreadContextStatePropagator = new TaskThreadContextStatePropagator();
+
+    public void testTransient() {
+        Map<String, Object> transientHeader = new HashMap<>();
+        transientHeader.put(TASK_ID, "t_1");
+        Map<String, Object> transientPropagatedHeader = taskThreadContextStatePropagator.transients(transientHeader, false);
+        assertEquals("t_1", transientPropagatedHeader.get(TASK_ID));
+    }
+
+    public void testTransientForSystemContext() {
+        Map<String, Object> transientHeader = new HashMap<>();
+        transientHeader.put(TASK_ID, "t_1");
+        Map<String, Object> transientPropagatedHeader = taskThreadContextStatePropagator.transients(transientHeader, true);
+        assertEquals("t_1", transientPropagatedHeader.get(TASK_ID));
+    }
+}
diff --git a/server/src/test/java/org/opensearch/telemetry/tracing/ThreadContextBasedTracerContextStorageTests.java b/server/src/test/java/org/opensearch/telemetry/tracing/ThreadContextBasedTracerContextStorageTests.java
index ee816aa5f596d..bf11bcaf39a96 100644
--- a/server/src/test/java/org/opensearch/telemetry/tracing/ThreadContextBasedTracerContextStorageTests.java
+++ b/server/src/test/java/org/opensearch/telemetry/tracing/ThreadContextBasedTracerContextStorageTests.java
@@ -252,4 +252,20 @@ public void run() {
         assertThat(threadContext.getTransient(ThreadContextBasedTracerContextStorage.CURRENT_SPAN), is(not(nullValue())));
         assertThat(threadContextStorage.get(ThreadContextBasedTracerContextStorage.CURRENT_SPAN), is(nullValue()));
     }
+
+    public void testSpanNotPropagatedToChildSystemThreadContext() {
+        final Span span = tracer.startSpan(SpanCreationContext.internal().name("test"));
+
+        try (SpanScope scope = tracer.withSpanInScope(span)) {
+            try (StoredContext ignored = threadContext.stashContext()) {
+                assertThat(threadContext.getTransient(ThreadContextBasedTracerContextStorage.CURRENT_SPAN), is(not(nullValue())));
+                assertThat(threadContextStorage.get(ThreadContextBasedTracerContextStorage.CURRENT_SPAN), is(span));
+                threadContext.markAsSystemContext();
+                assertThat(threadContext.getTransient(ThreadContextBasedTracerContextStorage.CURRENT_SPAN), is(nullValue()));
+            }
+        }
+
+        assertThat(threadContext.getTransient(ThreadContextBasedTracerContextStorage.CURRENT_SPAN), is(not(nullValue())));
+        assertThat(threadContextStorage.get(ThreadContextBasedTracerContextStorage.CURRENT_SPAN), is(nullValue()));
+    }
 }
diff --git a/test/framework/src/main/java/org/opensearch/index/alias/RandomAliasActionsGenerator.java b/test/framework/src/main/java/org/opensearch/index/alias/RandomAliasActionsGenerator.java
index ce862d2b69d8f..fb9db9a578b4a 100644
--- a/test/framework/src/main/java/org/opensearch/index/alias/RandomAliasActionsGenerator.java
+++ b/test/framework/src/main/java/org/opensearch/index/alias/RandomAliasActionsGenerator.java
@@ -102,6 +102,11 @@ public static AliasActions randomAliasAction(boolean useStringAsFilter) {
                 action.isHidden(randomBoolean());
             }
         }
+        if (action.actionType() == AliasActions.Type.REMOVE) {
+            if (randomBoolean()) {
+                action.mustExist(randomBoolean());
+            }
+        }
         return action;
     }