diff --git a/common/src/main/java/org/opensearch/ml/common/MLCommonsClassLoader.java b/common/src/main/java/org/opensearch/ml/common/MLCommonsClassLoader.java
index 8f3e537e68..b9413c5b4d 100644
--- a/common/src/main/java/org/opensearch/ml/common/MLCommonsClassLoader.java
+++ b/common/src/main/java/org/opensearch/ml/common/MLCommonsClassLoader.java
@@ -6,6 +6,7 @@
 package org.opensearch.ml.common;
 
 import lombok.extern.log4j.Log4j2;
+import org.opensearch.core.common.io.stream.StreamInput;
 import org.opensearch.ml.common.annotation.Connector;
 import org.opensearch.ml.common.annotation.ExecuteInput;
 import org.opensearch.ml.common.annotation.ExecuteOutput;
@@ -15,9 +16,11 @@
 import org.opensearch.ml.common.annotation.MLInput;
 import org.opensearch.ml.common.dataset.MLInputDataType;
 import org.opensearch.ml.common.exception.MLException;
+import org.opensearch.ml.common.output.MLOutput;
 import org.opensearch.ml.common.output.MLOutputType;
 import org.reflections.Reflections;
 
+import java.io.IOException;
 import java.lang.reflect.Constructor;
 import java.security.AccessController;
 import java.security.PrivilegedActionException;
@@ -203,12 +206,27 @@ public static <T extends Enum<T>, S, I extends Object> S initMLInstance(T type,
 
     @SuppressWarnings("unchecked")
     public static <T extends Enum<T>, S, I extends Object> S initExecuteInputInstance(T type, I in, Class<?> constructorParamClass) {
-        return init(executeInputClassMap, type, in, constructorParamClass);
+        try {
+            return init(executeInputClassMap, type, in, constructorParamClass);
+        } catch (Exception e) {
+            return init(mlInputClassMap, type, in, constructorParamClass);
+        }
     }
 
     @SuppressWarnings("unchecked")
     public static <T extends Enum<T>, S, I extends Object> S initExecuteOutputInstance(T type, I in, Class<?> constructorParamClass) {
-        return init(executeOutputClassMap, type, in, constructorParamClass);
+        try {
+            return init(executeOutputClassMap, type, in, constructorParamClass);
+        } catch (Exception e) {
+            if (in instanceof StreamInput) {
+                try {
+                    return (S) MLOutput.fromStream((StreamInput) in);
+                } catch (IOException ex) {
+                    throw new RuntimeException(ex);
+                }
+            }
+            throw e;
+        }
     }
 
     @SuppressWarnings("unchecked")
diff --git a/ml-algorithms/src/main/java/org/opensearch/ml/engine/Executable.java b/ml-algorithms/src/main/java/org/opensearch/ml/engine/Executable.java
index 2d4ade93fb..b90266c7f0 100644
--- a/ml-algorithms/src/main/java/org/opensearch/ml/engine/Executable.java
+++ b/ml-algorithms/src/main/java/org/opensearch/ml/engine/Executable.java
@@ -5,6 +5,7 @@
 
 package org.opensearch.ml.engine;
 
+import org.opensearch.core.action.ActionListener;
 import org.opensearch.ml.common.exception.ExecuteException;
 import org.opensearch.ml.common.input.Input;
 import org.opensearch.ml.common.output.Output;
@@ -16,5 +17,5 @@ public interface Executable {
      * @param input input data
      * @return execution result
      */
-    Output execute(Input input) throws ExecuteException;
+    void execute(Input input, ActionListener<Output> listener) throws ExecuteException;
 }
diff --git a/ml-algorithms/src/main/java/org/opensearch/ml/engine/MLEngine.java b/ml-algorithms/src/main/java/org/opensearch/ml/engine/MLEngine.java
index aeaed6bd21..85f06eb89d 100644
--- a/ml-algorithms/src/main/java/org/opensearch/ml/engine/MLEngine.java
+++ b/ml-algorithms/src/main/java/org/opensearch/ml/engine/MLEngine.java
@@ -9,6 +9,7 @@
 import java.util.Locale;
 import java.util.Map;
 
+import org.opensearch.core.action.ActionListener;
 import org.opensearch.ml.common.FunctionName;
 import org.opensearch.ml.common.MLModel;
 import org.opensearch.ml.common.dataframe.DataFrame;
@@ -152,20 +153,20 @@ public MLOutput trainAndPredict(Input input) {
         return trainAndPredictable.trainAndPredict(mlInput);
     }
 
-    public Output execute(Input input) throws Exception {
+    public void execute(Input input, ActionListener<Output> listener) throws Exception {
         validateInput(input);
         if (input.getFunctionName() == FunctionName.METRICS_CORRELATION) {
             MLExecutable executable = MLEngineClassLoader.initInstance(input.getFunctionName(), input, Input.class);
             if (executable == null) {
                 throw new IllegalArgumentException("Unsupported executable function: " + input.getFunctionName());
             }
-            return executable.execute(input);
+            executable.execute(input, listener);
         } else {
             Executable executable = MLEngineClassLoader.initInstance(input.getFunctionName(), input, Input.class);
             if (executable == null) {
                 throw new IllegalArgumentException("Unsupported executable function: " + input.getFunctionName());
             }
-            return executable.execute(input);
+            executable.execute(input, listener);
         }
     }
 
diff --git a/ml-algorithms/src/main/java/org/opensearch/ml/engine/algorithms/DLModelExecute.java b/ml-algorithms/src/main/java/org/opensearch/ml/engine/algorithms/DLModelExecute.java
index fab052da19..0ae0c44dc7 100644
--- a/ml-algorithms/src/main/java/org/opensearch/ml/engine/algorithms/DLModelExecute.java
+++ b/ml-algorithms/src/main/java/org/opensearch/ml/engine/algorithms/DLModelExecute.java
@@ -17,9 +17,9 @@
 import java.util.concurrent.atomic.AtomicInteger;
 
 import org.apache.commons.io.FileUtils;
+import org.opensearch.core.action.ActionListener;
 import org.opensearch.ml.common.FunctionName;
 import org.opensearch.ml.common.MLModel;
-import org.opensearch.ml.common.exception.ExecuteException;
 import org.opensearch.ml.common.exception.MLException;
 import org.opensearch.ml.common.input.Input;
 import org.opensearch.ml.common.model.MLModelFormat;
@@ -52,7 +52,7 @@ public abstract class DLModelExecute implements MLExecutable {
     protected Device[] devices;
     protected AtomicInteger nextDevice = new AtomicInteger(0);
 
-    public abstract Output execute(Input input) throws ExecuteException;
+    public abstract void execute(Input input, ActionListener<Output> listener);
 
     protected Predictor<float[][], ai.djl.modality.Output> getPredictor() {
         int currentDevice = nextDevice.getAndIncrement();
diff --git a/ml-algorithms/src/main/java/org/opensearch/ml/engine/algorithms/anomalylocalization/AnomalyLocalizerImpl.java b/ml-algorithms/src/main/java/org/opensearch/ml/engine/algorithms/anomalylocalization/AnomalyLocalizerImpl.java
index c874c903e4..b11fc9a39c 100644
--- a/ml-algorithms/src/main/java/org/opensearch/ml/engine/algorithms/anomalylocalization/AnomalyLocalizerImpl.java
+++ b/ml-algorithms/src/main/java/org/opensearch/ml/engine/algorithms/anomalylocalization/AnomalyLocalizerImpl.java
@@ -16,13 +16,10 @@
 import java.util.Map;
 import java.util.Optional;
 import java.util.PriorityQueue;
-import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.concurrent.atomic.AtomicReference;
 import java.util.stream.Collectors;
 import java.util.stream.IntStream;
 
-import org.opensearch.action.LatchedActionListener;
 import org.opensearch.action.search.MultiSearchRequest;
 import org.opensearch.action.search.MultiSearchResponse;
 import org.opensearch.action.search.SearchRequest;
@@ -527,23 +524,10 @@ protected List<Map.Entry<Long, Long>> getAllIntervals() {
     }
 
     @Override
-    public Output execute(Input input) {
-        CountDownLatch latch = new CountDownLatch(1);
-        AtomicReference<AnomalyLocalizationOutput> outRef = new AtomicReference<>();
-        AtomicReference<Exception> exRef = new AtomicReference<>();
+    public void execute(Input input, ActionListener<Output> listener) {
         getLocalizationResults(
             (AnomalyLocalizationInput) input,
-            new LatchedActionListener(ActionListener.<AnomalyLocalizationOutput>wrap(o -> outRef.set(o), e -> exRef.set(e)), latch)
+            ActionListener.wrap(o -> listener.onResponse(o), e -> listener.onFailure(e))
         );
-        try {
-            latch.await();
-        } catch (InterruptedException e) {
-            throw new IllegalStateException(e);
-        }
-        if (exRef.get() != null) {
-            throw new RuntimeException(exRef.get());
-        } else {
-            return outRef.get();
-        }
     }
 }
diff --git a/ml-algorithms/src/main/java/org/opensearch/ml/engine/algorithms/metrics_correlation/MetricsCorrelation.java b/ml-algorithms/src/main/java/org/opensearch/ml/engine/algorithms/metrics_correlation/MetricsCorrelation.java
index c44704f688..15bccadac0 100644
--- a/ml-algorithms/src/main/java/org/opensearch/ml/engine/algorithms/metrics_correlation/MetricsCorrelation.java
+++ b/ml-algorithms/src/main/java/org/opensearch/ml/engine/algorithms/metrics_correlation/MetricsCorrelation.java
@@ -107,8 +107,13 @@ public MetricsCorrelation(Client client, Settings settings, ClusterService clust
      *  contains 3 properties  event_window, event_pattern and suspected_metrics
      * @throws ExecuteException
      */
+    // @Override
+    // public MetricsCorrelationOutput execute(Input input) throws ExecuteException {
+    //
+    // }
+
     @Override
-    public MetricsCorrelationOutput execute(Input input) throws ExecuteException {
+    public void execute(Input input, ActionListener<org.opensearch.ml.common.output.Output> listener) {
         if (!(input instanceof MetricsCorrelationInput)) {
             throw new ExecuteException("wrong input");
         }
@@ -148,7 +153,7 @@ public MetricsCorrelationOutput execute(Input input) throws ExecuteException {
             } else {
                 try (ThreadContext.StoredContext context = client.threadPool().getThreadContext().stashContext()) {
                     GetRequest getModelRequest = new GetRequest(ML_MODEL_INDEX).id(FunctionName.METRICS_CORRELATION.name());
-                    ActionListener<GetResponse> listener = ActionListener.wrap(r -> {
+                    ActionListener<GetResponse> actionListener = ActionListener.wrap(r -> {
                         if (r.isExists()) {
                             modelId = r.getId();
                             Map<String, Object> sourceAsMap = r.getSourceAsMap();
@@ -176,7 +181,7 @@ public MetricsCorrelationOutput execute(Input input) throws ExecuteException {
                             );
                         }
                     }, e -> { log.error("Failed to get model", e); });
-                    client.get(getModelRequest, ActionListener.runBefore(listener, context::restore));
+                    client.get(getModelRequest, ActionListener.runBefore(actionListener, context::restore));
                 }
             }
         } else {
@@ -227,7 +232,7 @@ public MetricsCorrelationOutput execute(Input input) throws ExecuteException {
         }
 
         tensorOutputs.add(parseModelTensorOutput(djlOutput, null));
-        return new MetricsCorrelationOutput(tensorOutputs);
+        listener.onResponse(new MetricsCorrelationOutput(tensorOutputs));
     }
 
     @VisibleForTesting