diff --git a/components/mediators/datamapper/org.wso2.carbon.mediator.datamapper.engine/src/main/java/org/wso2/carbon/mediator/datamapper/engine/core/executors/ScriptExecutor.java b/components/mediators/datamapper/org.wso2.carbon.mediator.datamapper.engine/src/main/java/org/wso2/carbon/mediator/datamapper/engine/core/executors/ScriptExecutor.java
index d1f06ce2668..f5a69b90ee9 100644
--- a/components/mediators/datamapper/org.wso2.carbon.mediator.datamapper.engine/src/main/java/org/wso2/carbon/mediator/datamapper/engine/core/executors/ScriptExecutor.java
+++ b/components/mediators/datamapper/org.wso2.carbon.mediator.datamapper.engine/src/main/java/org/wso2/carbon/mediator/datamapper/engine/core/executors/ScriptExecutor.java
@@ -91,6 +91,8 @@ public ScriptExecutor(ScriptExecutorType scriptExecutorType) {
                 }
             case GRAALJS:
                 try {
+                    // Set the system property to disable the warning messages
+                    System.setProperty("polyglot.engine.WarnInterpreterOnly", "false");
                     scriptEngine = new ScriptEngineManager().getEngineByName(DataMapperEngineConstants.GRAALJS_ENGINE_NAME);
                     bindings = scriptEngine.createBindings();
                     log.debug("Setting Graal.js as Script Engine");
diff --git a/components/mediators/datamapper/org.wso2.carbon.mediator.datamapper.engine/src/main/java/org/wso2/carbon/mediator/datamapper/engine/output/formatters/MapOutputFormatter.java b/components/mediators/datamapper/org.wso2.carbon.mediator.datamapper.engine/src/main/java/org/wso2/carbon/mediator/datamapper/engine/output/formatters/MapOutputFormatter.java
index 25fa944889a..18dbccc9f54 100644
--- a/components/mediators/datamapper/org.wso2.carbon.mediator.datamapper.engine/src/main/java/org/wso2/carbon/mediator/datamapper/engine/output/formatters/MapOutputFormatter.java
+++ b/components/mediators/datamapper/org.wso2.carbon.mediator.datamapper.engine/src/main/java/org/wso2/carbon/mediator/datamapper/engine/output/formatters/MapOutputFormatter.java
@@ -26,7 +26,9 @@
 import org.wso2.carbon.mediator.datamapper.engine.output.OutputMessageBuilder;
 import org.wso2.carbon.mediator.datamapper.engine.utils.DataMapperEngineUtils;
 
+import java.util.AbstractList;
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.Map;
 import java.util.Set;
@@ -121,6 +123,9 @@ private void traverseMap(Map<Object, Object> outputMap) throws SchemaException,
                     throw new WriterException(e.getMessage(),e);
                 }
             }
+            if (value instanceof AbstractList) {
+                value = convertListToMap((AbstractList)value);
+            }
             if (value instanceof Map) {
                 // key value is a type of object or an array
                 if (arrayType) {
@@ -166,6 +171,14 @@ private void traverseMap(Map<Object, Object> outputMap) throws SchemaException,
         }
     }
 
+    private Map convertListToMap(AbstractList polyglotList) {
+        Map<Object, Object> map = new HashMap<>();
+        for (int i = 0; i < polyglotList.size(); i++) {
+            map.put(i, polyglotList.get(i));
+        }
+        return map;
+    }
+
     private void sendPrimitiveEvent(String key, Object value) throws SchemaException, WriterException {
         getOutputMessageBuilder().notifyEvent(new ReaderEvent(ReaderEventType.PRIMITIVE, key, value));
     }
diff --git a/pom.xml b/pom.xml
index da2e293ed86..e0c688a610a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -2701,7 +2701,7 @@
         <!-- OAS3 Versions -->
         <swagger.parser.orbit.version>2.1.18.wso2v1</swagger.parser.orbit.version>
         <transport.http.netty>6.3.50</transport.http.netty>
-        <graalvm.version>23.0.4</graalvm.version>
+        <graalvm.version>22.3.4</graalvm.version>
         <icu.version>72.1</icu.version>
         <runtime.diagnostics.version>1.1.0</runtime.diagnostics.version>
     </properties>