Fix set model state if runtime is null (#2928)

* Fix empty runtime issue + add test

* Remove creation of mnist.mar cpp test file

* Fix format error

frontend/server/src/main/java/org/pytorch/serve/wlm/Model.java

@@ -1,5 +1,6 @@
 package org.pytorch.serve.wlm;
 
+import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import java.io.File;
 import java.util.Collections;
@@ -182,7 +183,12 @@ public void setModelState(JsonObject modelInfo) {
         maxBatchDelay = modelInfo.get(MAX_BATCH_DELAY).getAsInt();
         responseTimeout = modelInfo.get(RESPONSE_TIMEOUT).getAsInt();
         batchSize = modelInfo.get(BATCH_SIZE).getAsInt();
-        runtimeType = Manifest.RuntimeType.fromValue(modelInfo.get(RUNTIME_TYPE).getAsString());
+
+        JsonElement runtime = modelInfo.get(RUNTIME_TYPE);
+        String runtime_str = Manifest.RuntimeType.PYTHON.getValue();
+        if (runtime != null) runtime_str = runtime.getAsString();
+
+        runtimeType = Manifest.RuntimeType.fromValue(runtime_str);
         if (modelInfo.get(PARALLEL_LEVEL) != null) {
             parallelLevel = modelInfo.get(PARALLEL_LEVEL).getAsInt();
         }

test/pytest/test_snapshot.py

@@ -1,9 +1,11 @@
+import glob
+import json
+import os
 import platform
 import time
-import os
-import glob
+from pathlib import Path
+
 import requests
-import json
 import test_utils
 
 
@@ -16,7 +18,11 @@ def teardown_module(module):
 
 
 def replace_mar_file_with_dummy_mar_in_model_store(model_store=None, model_mar=None):
-    model_store = model_store if (model_store != None) else os.path.join(test_utils.ROOT_DIR, "model_store")
+    model_store = (
+        model_store
+        if (model_store != None)
+        else os.path.join(test_utils.ROOT_DIR, "model_store")
+    )
     if model_mar != None:
         myfilepath = os.path.join(model_store, model_mar)
         if os.path.exists(myfilepath):
@@ -32,20 +38,22 @@ def test_snapshot_created_on_start_and_stop():
     test_utils.delete_all_snapshots()
     test_utils.start_torchserve()
     test_utils.stop_torchserve()
-    assert len(glob.glob('logs/config/*startup.cfg')) == 1
+    assert len(glob.glob("logs/config/*startup.cfg")) == 1
     if platform.system() != "Windows":
-        assert len(glob.glob('logs/config/*shutdown.cfg')) == 1
+        assert len(glob.glob("logs/config/*shutdown.cfg")) == 1
 
 
 def snapshot_created_on_management_api_invoke(model_mar="densenet161.mar"):
     test_utils.delete_all_snapshots()
     test_utils.start_torchserve()
     mar_path = "mar_path_{}".format(model_mar[0:-4])
     if mar_path in test_utils.mar_file_table:
-        requests.post('http://127.0.0.1:8081/models?url=' + model_mar)
+        requests.post("http://127.0.0.1:8081/models?url=" + model_mar)
     else:
-        requests.post('http://127.0.0.1:8081/models?url=https://torchserve.pytorch.org/mar_files/'
-                  + model_mar)
+        requests.post(
+            "http://127.0.0.1:8081/models?url=https://torchserve.pytorch.org/mar_files/"
+            + model_mar
+        )
     time.sleep(10)
     test_utils.stop_torchserve()
 
@@ -55,17 +63,17 @@ def test_snapshot_created_on_management_api_invoke():
     Validates that snapshot.cfg is created when management apis are invoked.
     """
     snapshot_created_on_management_api_invoke()
-    assert len(glob.glob('logs/config/*snap*.cfg')) == 1
+    assert len(glob.glob("logs/config/*snap*.cfg")) == 1
 
 
 def test_start_from_snapshot():
     """
     Validates if we can restore state from snapshot.
     """
-    snapshot_cfg = glob.glob('logs/config/*snap*.cfg')[0]
+    snapshot_cfg = glob.glob("logs/config/*snap*.cfg")[0]
     test_utils.start_torchserve(snapshot_file=snapshot_cfg)
-    response = requests.get('http://127.0.0.1:8081/models/')
-    assert json.loads(response.content)['models'][0]['modelName'] == "densenet161"
+    response = requests.get("http://127.0.0.1:8081/models/")
+    assert json.loads(response.content)["models"][0]["modelName"] == "densenet161"
     test_utils.stop_torchserve()
 
 
@@ -74,26 +82,30 @@ def test_start_from_latest():
     Validates if latest snapshot file is picked if we dont pass snapshot arg explicitly.
     """
     test_utils.start_torchserve()
-    response = requests.get('http://127.0.0.1:8081/models/')
-    assert json.loads(response.content)['models'][0]['modelName'] == "densenet161"
+    response = requests.get("http://127.0.0.1:8081/models/")
+    assert json.loads(response.content)["models"][0]["modelName"] == "densenet161"
     test_utils.stop_torchserve()
 
 
 def test_start_from_read_only_snapshot():
     """
     Validates if we can start and restore Torchserve state using a read-only snapshot.
     """
-    snapshot_cfg = glob.glob('logs/config/*snap*.cfg')[0]
+    snapshot_cfg = glob.glob("logs/config/*snap*.cfg")[0]
     file_status = os.stat(snapshot_cfg)
     os.chmod(snapshot_cfg, 0o444)
     test_utils.start_torchserve(snapshot_file=snapshot_cfg)
     os.chmod(snapshot_cfg, (file_status.st_mode & 0o777))
     try:
-        response = requests.get('http://127.0.0.1:8081/models/')
+        response = requests.get("http://127.0.0.1:8081/models/")
     except:
-        assert False, "Something is not right!! Failed to start Torchserve using Read Only Snapshot!!"
+        assert (
+            False
+        ), "Something is not right!! Failed to start Torchserve using Read Only Snapshot!!"
     else:
-        assert True, "Successfully started and restored Torchserve state using a Read Only Snapshot"
+        assert (
+            True
+        ), "Successfully started and restored Torchserve state using a Read Only Snapshot"
 
 
 def test_no_config_snapshots_cli_option():
@@ -105,7 +117,7 @@ def test_no_config_snapshots_cli_option():
     test_utils.delete_all_snapshots()
     test_utils.start_torchserve(no_config_snapshots=True)
     test_utils.stop_torchserve()
-    assert len(glob.glob('logs/config/*.cfg')) == 0
+    assert len(glob.glob("logs/config/*.cfg")) == 0
 
 
 def test_start_from_default():
@@ -114,8 +126,8 @@ def test_start_from_default():
     """
     test_utils.delete_all_snapshots()
     test_utils.start_torchserve()
-    response = requests.get('http://127.0.0.1:8081/models/')
-    assert len(json.loads(response.content)['models']) == 0
+    response = requests.get("http://127.0.0.1:8081/models/")
+    assert len(json.loads(response.content)["models"]) == 0
 
 
 def test_start_from_non_existing_snapshot():
@@ -126,82 +138,101 @@ def test_start_from_non_existing_snapshot():
     test_utils.stop_torchserve()
     test_utils.start_torchserve(snapshot_file="logs/config/junk-snapshot.cfg")
     try:
-        response = requests.get('http://127.0.0.1:8081/models/')
+        response = requests.get("http://127.0.0.1:8081/models/")
     except:
         assert True, "Failed to start Torchserve using a Non Existing Snapshot"
     else:
-        assert False, "Something is not right!! Successfully started Torchserve " \
-                      "using Non Existing Snapshot File!!"
+        assert False, (
+            "Something is not right!! Successfully started Torchserve "
+            "using Non Existing Snapshot File!!"
+        )
 
 
 def test_torchserve_init_with_non_existent_model_store():
-    """Validates that Torchserve fails to start if the model store directory is non existent """
+    """Validates that Torchserve fails to start if the model store directory is non existent"""
 
-    test_utils.start_torchserve(model_store="/invalid_model_store", snapshot_file=None, no_config_snapshots=True)
+    test_utils.start_torchserve(
+        model_store="/invalid_model_store", snapshot_file=None, no_config_snapshots=True
+    )
     try:
-        response = requests.get('http://127.0.0.1:8081/models/')
+        response = requests.get("http://127.0.0.1:8081/models/")
     except:
-        assert True, "Failed to start Torchserve using non existent model-store directory"
+        assert (
+            True
+        ), "Failed to start Torchserve using non existent model-store directory"
     else:
-        assert False, "Something is not right!! Successfully started Torchserve " \
-                      "using non existent directory!!"
+        assert False, (
+            "Something is not right!! Successfully started Torchserve "
+            "using non existent directory!!"
+        )
     finally:
         test_utils.delete_model_store()
         test_utils.delete_all_snapshots()
 
 
 def test_restart_torchserve_with_last_snapshot_with_model_mar_removed():
     """Validates that torchserve will fail to start in the following scenario:
-        1) We use a snapshot file to start torchserve. The snapshot contains reference to "A" model file
-        2) The "A" model mar file is accidentally deleted from the model store"""
+    1) We use a snapshot file to start torchserve. The snapshot contains reference to "A" model file
+    2) The "A" model mar file is accidentally deleted from the model store"""
 
     # Register model using mgmt api
     snapshot_created_on_management_api_invoke()
 
     # Now remove the registered model mar file (delete_mar_ fn)
-    test_utils.delete_mar_file_from_model_store(model_store=os.path.join(test_utils.ROOT_DIR, "model_store"),
-                                                model_mar="densenet")
+    test_utils.delete_mar_file_from_model_store(
+        model_store=os.path.join(test_utils.ROOT_DIR, "model_store"),
+        model_mar="densenet",
+    )
 
     # Start Torchserve with last generated snapshot file
-    snapshot_cfg = glob.glob('logs/config/*snap*.cfg')[0]
+    snapshot_cfg = glob.glob("logs/config/*snap*.cfg")[0]
     test_utils.start_torchserve(snapshot_file=snapshot_cfg, gen_mar=False)
     try:
-        response = requests.get('http://127.0.0.1:8081/models/')
+        response = requests.get("http://127.0.0.1:8081/models/")
     except:
-        assert True, "Failed to start Torchserve properly as reqd model mar file is missing!!"
+        assert (
+            True
+        ), "Failed to start Torchserve properly as reqd model mar file is missing!!"
     else:
-        assert False, "Something is not right!! Successfully started Torchserve without reqd mar file"
+        assert (
+            False
+        ), "Something is not right!! Successfully started Torchserve without reqd mar file"
     finally:
         test_utils.delete_model_store()
         test_utils.delete_all_snapshots()
 
 
 def test_replace_mar_file_with_dummy():
     """Validates that torchserve will fail to start in the following scenario:
-        1) We use a snapshot file to start torchserve. The snapshot contains reference to "A" model file
-        2) "A" model file gets corrupted or is replaced by some dummy mar file with same name"""
+    1) We use a snapshot file to start torchserve. The snapshot contains reference to "A" model file
+    2) "A" model file gets corrupted or is replaced by some dummy mar file with same name
+    """
 
     snapshot_created_on_management_api_invoke()
 
     # Start Torchserve using last snapshot state
-    snapshot_cfg = glob.glob('logs/config/*snap*.cfg')[0]
+    snapshot_cfg = glob.glob("logs/config/*snap*.cfg")[0]
     test_utils.start_torchserve(snapshot_file=snapshot_cfg)
-    response = requests.get('http://127.0.0.1:8081/models/')
-    assert json.loads(response.content)['models'][0]['modelName'] == "densenet161"
+    response = requests.get("http://127.0.0.1:8081/models/")
+    assert json.loads(response.content)["models"][0]["modelName"] == "densenet161"
     test_utils.stop_torchserve()
 
     # Now replace the registered model mar with dummy file
     replace_mar_file_with_dummy_mar_in_model_store(
-        model_store=os.path.join(test_utils.ROOT_DIR, "model_store"), model_mar="densenet161.mar")
-    snapshot_cfg = glob.glob('logs/config/*snap*.cfg')[0]
+        model_store=os.path.join(test_utils.ROOT_DIR, "model_store"),
+        model_mar="densenet161.mar",
+    )
+    snapshot_cfg = glob.glob("logs/config/*snap*.cfg")[0]
     test_utils.start_torchserve(snapshot_file=snapshot_cfg, gen_mar=False)
     try:
-        response = requests.get('http://127.0.0.1:8081/models/')
-        assert json.loads(response.content)['models'][0]['modelName'] == "densenet161"
+        response = requests.get("http://127.0.0.1:8081/models/")
+        assert json.loads(response.content)["models"][0]["modelName"] == "densenet161"
     except:
         assert False, "Default manifest does not work"
     else:
-        assert True, "Successfully started Torchserve with a dummy mar file (ie. default manifest)"
+        assert (
+            True
+        ), "Successfully started Torchserve with a dummy mar file (ie. default manifest)"
     finally:
         test_utils.unregister_model("densenet161")
         test_utils.delete_all_snapshots()
@@ -211,41 +242,85 @@ def test_replace_mar_file_with_dummy():
 
 def test_restart_torchserve_with_one_of_model_mar_removed():
     """Validates that torchserve will fail to start in the following scenario:
-        1) We use a snapshot file to start torchserve. The snapshot contains reference to few model files
-        2) One of these model mar files are accidentally deleted from the model store"""
+    1) We use a snapshot file to start torchserve. The snapshot contains reference to few model files
+    2) One of these model mar files are accidentally deleted from the model store"""
     # Register multiple models
     # 1st model
     test_utils.delete_model_store()
     test_utils.start_torchserve()
-    requests.post(
-        'http://127.0.0.1:8081/models?url=densenet161.mar')
+    requests.post("http://127.0.0.1:8081/models?url=densenet161.mar")
     time.sleep(15)
     # 2nd model
-    requests.post(
-        'http://127.0.0.1:8081/models?url=mnist.mar')
+    requests.post("http://127.0.0.1:8081/models?url=mnist.mar")
     time.sleep(15)
     test_utils.stop_torchserve()
 
     # Start Torchserve
     test_utils.start_torchserve()
-    response = requests.get('http://127.0.0.1:8081/models/')
-    num_of_regd_models = len(json.loads(response.content)['models'])
+    response = requests.get("http://127.0.0.1:8081/models/")
+    num_of_regd_models = len(json.loads(response.content)["models"])
     test_utils.stop_torchserve()
 
     # Now remove the registered model mar file (delete_mar_ fn)
-    test_utils.delete_mar_file_from_model_store(model_store=os.path.join(test_utils.ROOT_DIR, "model_store"),
-                                                model_mar="densenet")
+    test_utils.delete_mar_file_from_model_store(
+        model_store=os.path.join(test_utils.ROOT_DIR, "model_store"),
+        model_mar="densenet",
+    )
 
     # Start Torchserve with existing snapshot file containing reference to one of the model mar file
     # which is now missing from the model store
-    snapshot_cfg = glob.glob('logs/config/*snap*.cfg')[1]
+    snapshot_cfg = glob.glob("logs/config/*snap*.cfg")[1]
     test_utils.start_torchserve(snapshot_file=snapshot_cfg, gen_mar=False)
     try:
-        response = requests.get('http://127.0.0.1:8081/models/')
+        response = requests.get("http://127.0.0.1:8081/models/")
     except:
-        assert True, "Failed to start Torchserve as one of reqd model mar file is missing"
+        assert (
+            True
+        ), "Failed to start Torchserve as one of reqd model mar file is missing"
     else:
-        assert False, "Something is not right!! Started Torchserve successfully with a " \
-                      "reqd model mar file missing from the model store!!"
+        assert False, (
+            "Something is not right!! Started Torchserve successfully with a "
+            "reqd model mar file missing from the model store!!"
+        )
     finally:
-        test_utils.torchserve_cleanup()
+        test_utils.torchserve_cleanup()
+
+
+def test_empty_runtime():
+    test_utils.delete_all_snapshots()
+    test_utils.stop_torchserve()
+    test_utils.start_torchserve()
+    requests.post("http://127.0.0.1:8081/models?url=mnist.mar")
+    test_utils.stop_torchserve()
+
+    cfgs = glob.glob("logs/config/*shutdown.cfg")
+    assert len(cfgs) == 1
+
+    def remove_runtime_type(json_str):
+        # Remove the prefix 'model_snapshot=' from the input string
+        model_snapshot = json.loads(
+            json_str[len("model_snapshot=") :].replace("\\:", ":").replace("\\n", "")
+        )
+
+        # Remove the "runtimeType" element from the JSON object
+        for model in model_snapshot["models"].values():
+            for version, config in model.items():
+                del config["runtimeType"]
+
+        # Return the modified JSON object as a string with the original prefix
+        return "model_snapshot=" + json.dumps(model_snapshot, indent=2).replace(
+            "\n", "\\n"
+        ).replace(":", "\\:")
+
+    cfg_text = Path(cfgs[0]).read_text().split("\n")
+    model_snapshot = [line for line in cfg_text if line.startswith("model_snapshot")][0]
+    cfg_text = [line for line in cfg_text if not line.startswith("model_snapshot")]
+    cfg_text += [remove_runtime_type(model_snapshot)]
+    Path(cfgs[0]).write_text("\n".join(cfg_text))
+
+    test_utils.start_torchserve()
+
+    try:
+        requests.get("http://127.0.0.1:8081/models/")
+    except:
+        assert False, "Could not start TorchServe."