diff --git a/plugin/src/main/java/org/opensearch/ml/model/MLModelManager.java b/plugin/src/main/java/org/opensearch/ml/model/MLModelManager.java
index 07720d45f8..c59aa6e8e1 100644
--- a/plugin/src/main/java/org/opensearch/ml/model/MLModelManager.java
+++ b/plugin/src/main/java/org/opensearch/ml/model/MLModelManager.java
@@ -94,6 +94,7 @@
 import org.opensearch.ml.common.MLTask;
 import org.opensearch.ml.common.connector.Connector;
 import org.opensearch.ml.common.exception.MLException;
+import org.opensearch.ml.common.exception.MLLimitExceededException;
 import org.opensearch.ml.common.exception.MLResourceNotFoundException;
 import org.opensearch.ml.common.exception.MLValidationException;
 import org.opensearch.ml.common.model.MLModelState;
@@ -318,9 +319,10 @@ private void uploadMLModelMeta(MLRegisterModelMetaInput mlRegisterModelMetaInput
      * @param mlTask      ML task
      */
     public void registerMLModel(MLRegisterModelInput registerModelInput, MLTask mlTask) {
-        mlStats.getStat(MLNodeLevelStat.ML_NODE_TOTAL_REQUEST_COUNT).increment();
+
         checkAndAddRunningTask(mlTask, maxRegisterTasksPerNode);
         try {
+            mlStats.getStat(MLNodeLevelStat.ML_NODE_TOTAL_REQUEST_COUNT).increment();
             mlStats.getStat(MLNodeLevelStat.ML_NODE_EXECUTING_TASK_COUNT).increment();
             mlStats.createCounterStatIfAbsent(mlTask.getFunctionName(), REGISTER, ML_ACTION_REQUEST_COUNT).increment();
 
@@ -380,7 +382,6 @@ public void registerMLModel(MLRegisterModelInput registerModelInput, MLTask mlTa
                 handleException(registerModelInput.getFunctionName(), mlTask.getTaskId(), e);
             }
         } catch (Exception e) {
-            mlStats.createCounterStatIfAbsent(mlTask.getFunctionName(), REGISTER, MLActionLevelStat.ML_ACTION_FAILURE_COUNT).increment();
             handleException(registerModelInput.getFunctionName(), mlTask.getTaskId(), e);
         } finally {
             mlStats.getStat(MLNodeLevelStat.ML_NODE_EXECUTING_TASK_COUNT).increment();
@@ -392,9 +393,9 @@ private void indexRemoteModel(MLRegisterModelInput registerModelInput, MLTask ml
         FunctionName functionName = mlTask.getFunctionName();
         try (ThreadContext.StoredContext context = client.threadPool().getThreadContext().stashContext()) {
             mlStats.getStat(MLNodeLevelStat.ML_NODE_TOTAL_REQUEST_COUNT).increment();
-
             mlStats.createCounterStatIfAbsent(functionName, REGISTER, ML_ACTION_REQUEST_COUNT).increment();
             mlStats.getStat(MLNodeLevelStat.ML_NODE_EXECUTING_TASK_COUNT).increment();
+
             String modelName = registerModelInput.getModelName();
             String version = modelVersion == null ? registerModelInput.getVersion() : modelVersion;
             Instant now = Instant.now();
@@ -462,7 +463,6 @@ private void registerModelFromUrl(MLRegisterModelInput registerModelInput, MLTas
         FunctionName functionName = mlTask.getFunctionName();
         try (ThreadContext.StoredContext context = client.threadPool().getThreadContext().stashContext()) {
             mlStats.getStat(MLNodeLevelStat.ML_NODE_TOTAL_REQUEST_COUNT).increment();
-
             mlStats.createCounterStatIfAbsent(functionName, REGISTER, ML_ACTION_REQUEST_COUNT).increment();
             mlStats.getStat(MLNodeLevelStat.ML_NODE_EXECUTING_TASK_COUNT).increment();
             String modelName = registerModelInput.getModelName();
@@ -689,7 +689,12 @@ private void deleteModel(String modelId) {
     }
 
     private void handleException(FunctionName functionName, String taskId, Exception e) {
-        mlStats.createCounterStatIfAbsent(functionName, REGISTER, MLActionLevelStat.ML_ACTION_FAILURE_COUNT).increment();
+        if (!(e instanceof MLLimitExceededException)
+            && !(e instanceof MLResourceNotFoundException)
+            && !(e instanceof IllegalArgumentException)) {
+            mlStats.createCounterStatIfAbsent(functionName, REGISTER, MLActionLevelStat.ML_ACTION_FAILURE_COUNT).increment();
+            mlStats.getStat(MLNodeLevelStat.ML_NODE_TOTAL_FAILURE_COUNT).increment();
+        }
         Map<String, Object> updated = ImmutableMap.of(ERROR_FIELD, MLExceptionUtils.getRootCauseMessage(e), STATE_FIELD, FAILED);
         mlTaskManager.updateMLTask(taskId, updated, TIMEOUT_IN_MILLIS, true);
     }
@@ -713,6 +718,7 @@ public void deployModel(
         ActionListener<String> listener
     ) {
         mlStats.createCounterStatIfAbsent(functionName, ActionName.DEPLOY, ML_ACTION_REQUEST_COUNT).increment();
+        mlStats.getStat(MLNodeLevelStat.ML_NODE_TOTAL_REQUEST_COUNT).increment();
         List<String> workerNodes = mlTask.getWorkerNodes();
         if (modelCacheHelper.isModelDeployed(modelId)) {
             if (workerNodes != null && workerNodes.size() > 0) {
@@ -835,7 +841,13 @@ public void deployModel(
     }
 
     private void handleDeployModelException(String modelId, FunctionName functionName, ActionListener<String> listener, Exception e) {
-        mlStats.createCounterStatIfAbsent(functionName, ActionName.DEPLOY, MLActionLevelStat.ML_ACTION_FAILURE_COUNT).increment();
+
+        if (!(e instanceof MLLimitExceededException)
+            && !(e instanceof MLResourceNotFoundException)
+            && !(e instanceof IllegalArgumentException)) {
+            mlStats.createCounterStatIfAbsent(functionName, ActionName.DEPLOY, MLActionLevelStat.ML_ACTION_FAILURE_COUNT).increment();
+            mlStats.getStat(MLNodeLevelStat.ML_NODE_TOTAL_FAILURE_COUNT).increment();
+        }
         removeModel(modelId);
         listener.onFailure(e);
     }
@@ -858,7 +870,7 @@ public void getModel(String modelId, ActionListener<MLModel> listener) {
     }
 
     /**
-     * Get model from model index with includes/exludes filter.
+     * Get model from model index with includes/excludes filter.
      *
      * @param modelId  model id
      * @param includes fields included
@@ -1045,6 +1057,7 @@ public synchronized Map<String, String> undeployModel(String[] modelIds) {
                 if (modelCacheHelper.isModelDeployed(modelId)) {
                     modelUndeployStatus.put(modelId, UNDEPLOYED);
                     mlStats.getStat(MLNodeLevelStat.ML_NODE_TOTAL_MODEL_COUNT).decrement();
+                    mlStats.getStat(MLNodeLevelStat.ML_NODE_TOTAL_REQUEST_COUNT).increment();
                     mlStats
                         .createCounterStatIfAbsent(getModelFunctionName(modelId), ActionName.UNDEPLOY, ML_ACTION_REQUEST_COUNT)
                         .increment();
diff --git a/plugin/src/main/java/org/opensearch/ml/utils/MLExceptionUtils.java b/plugin/src/main/java/org/opensearch/ml/utils/MLExceptionUtils.java
index de2c713d5e..e831388b86 100644
--- a/plugin/src/main/java/org/opensearch/ml/utils/MLExceptionUtils.java
+++ b/plugin/src/main/java/org/opensearch/ml/utils/MLExceptionUtils.java
@@ -44,9 +44,11 @@ public static String toJsonString(Map<String, String> nodeErrors) throws IOExcep
 
     public static void logException(String errorMessage, Exception e, Logger log) {
         Throwable rootCause = ExceptionUtils.getRootCause(e);
-        if (e instanceof MLLimitExceededException || e instanceof MLResourceNotFoundException) {
+        if (e instanceof MLLimitExceededException || e instanceof MLResourceNotFoundException || e instanceof IllegalArgumentException) {
             log.warn(e.getMessage());
-        } else if (rootCause instanceof MLLimitExceededException || rootCause instanceof MLResourceNotFoundException) {
+        } else if (rootCause instanceof MLLimitExceededException
+            || rootCause instanceof MLResourceNotFoundException
+            || rootCause instanceof IllegalArgumentException) {
             log.warn(rootCause.getMessage());
         } else {
             log.error(errorMessage, e);
diff --git a/plugin/src/test/java/org/opensearch/ml/model/MLModelManagerTests.java b/plugin/src/test/java/org/opensearch/ml/model/MLModelManagerTests.java
index 9f5cb8c441..cc0b66a3fe 100644
--- a/plugin/src/test/java/org/opensearch/ml/model/MLModelManagerTests.java
+++ b/plugin/src/test/java/org/opensearch/ml/model/MLModelManagerTests.java
@@ -733,7 +733,8 @@ private void testDeployModel_FailedToRetrieveModelChunks(boolean lastChunk) {
 
         modelManager.deployModel(modelId, modelContentHashValue, functionName, true, mlTask, listener);
         verify(modelCacheHelper).removeModel(eq(modelId));
-        verify(mlStats).createCounterStatIfAbsent(eq(functionName), eq(ActionName.DEPLOY), eq(MLActionLevelStat.ML_ACTION_FAILURE_COUNT));
+        verify(mlStats).createCounterStatIfAbsent(eq(functionName), eq(ActionName.DEPLOY), eq(MLActionLevelStat.ML_ACTION_REQUEST_COUNT));
+        verify(mlStats).getStat(eq(MLNodeLevelStat.ML_NODE_TOTAL_REQUEST_COUNT));
     }
 
     private void mock_client_index_ModelChunkFailure(Client client, String modelId) {