Revert "perf: use netty buffer to pool memory (#1788)"

This reverts commit 5317eff.

build.gradle

@@ -1507,9 +1507,6 @@ project(':clients') {
     implementation libs.snappy
     implementation libs.slf4jApi
     implementation libs.opentelemetryProto
-    // AutoMQ for Kafka inject start
-    implementation libs.nettyBuffer
-    // AutoMQ for Kafka inject end
 
     // libraries which should be added as runtime dependencies in generated pom.xml should be defined here:
     shadowed libs.zstd

clients/src/main/java/org/apache/kafka/common/utils/BufferSupplier.java

@@ -17,13 +17,10 @@
 
 package org.apache.kafka.common.utils;
 
-import io.netty.buffer.ByteBuf;
-import io.netty.buffer.PooledByteBufAllocator;
 import java.nio.ByteBuffer;
 import java.util.ArrayDeque;
 import java.util.Deque;
 import java.util.HashMap;
-import java.util.IdentityHashMap;
 import java.util.Map;
 
 /**
@@ -124,36 +121,4 @@ public void close() {
         }
     }
 
-    // AutoMQ for Kafka inject start
-    public static class NettyBufferSupplier extends BufferSupplier {
-        // We currently use a single block size, so optimise for that case
-        // visible for testing
-        final Map<ByteBuffer, ByteBuf> bufferMap = new IdentityHashMap<>(1);
-
-        @Override
-        public ByteBuffer get(int capacity) {
-            ByteBuf byteBuf = PooledByteBufAllocator.DEFAULT.heapBuffer(capacity);
-            ByteBuffer byteBuffer = byteBuf.nioBuffer(0, capacity);
-            bufferMap.put(byteBuffer, byteBuf);
-            return byteBuffer;
-        }
-
-        @Override
-        public void release(ByteBuffer buffer) {
-            ByteBuf byteBuf = bufferMap.remove(buffer);
-            if (byteBuf != null) {
-                byteBuf.release();
-            }
-        }
-
-        @Override
-        public void close() {
-            for (ByteBuf byteBuf : bufferMap.values()) {
-                byteBuf.release();
-            }
-            bufferMap.clear();
-        }
-    }
-    // AutoMQ for Kafka inject end
-
 }

raft/src/main/java/org/apache/kafka/raft/KafkaRaftClient.java

@@ -347,10 +347,7 @@ private Optional<SnapshotReader<T>> latestSnapshot() {
         return log.latestSnapshot().map(reader ->
             RecordsSnapshotReader.of(reader,
                 serde,
-                // AutoMQ for Kafka inject start
-                // BufferSupplier.create(),
-                new BufferSupplier.NettyBufferSupplier(),
-                // AutoMQ for Kafka inject end
+                BufferSupplier.create(),
                 MAX_BATCH_SIZE_BYTES,
                 true /* Validate batch CRC*/
             )
@@ -389,10 +386,7 @@ public void initialize(
             Optional.of(VoterSet.fromInetSocketAddresses(listenerName, voterAddresses)),
             log,
             serde,
-            // AutoMQ for Kafka inject start
-            // BufferSupplier.create(),
-            new BufferSupplier.NettyBufferSupplier(),
-            // AutoMQ for Kafka inject end
+            BufferSupplier.create(),
             MAX_BATCH_SIZE_BYTES,
             logContext
         );
@@ -2706,10 +2700,7 @@ private void fireHandleCommit(long baseOffset, Records records) {
                     baseOffset,
                     records,
                     serde,
-                    // AutoMQ for Kafka inject start
-                    // BufferSupplier.create(),
-                    new BufferSupplier.NettyBufferSupplier(),
-                    // AutoMQ for Kafka inject end
+                    BufferSupplier.create(),
                     MAX_BATCH_SIZE_BYTES,
                     this,
                     true /* Validate batch CRC*/