diff --git a/libs/core/src/main/java/org/opensearch/BaseOpenSearchException.java b/libs/core/src/main/java/org/opensearch/BaseOpenSearchException.java
index f760e2a602e94..6af113657882a 100644
--- a/libs/core/src/main/java/org/opensearch/BaseOpenSearchException.java
+++ b/libs/core/src/main/java/org/opensearch/BaseOpenSearchException.java
@@ -80,6 +80,7 @@ public abstract class BaseOpenSearchException extends RuntimeException {
     protected static final String RESOURCE_METADATA_TYPE_KEY = "opensearch.resource.type";
     protected static final String RESOURCE_METADATA_ID_KEY = "opensearch.resource.id";
     protected static final Version UNKNOWN_VERSION_ADDED = Version.fromId(0);
+    protected static final String INDEX_METADATA_KEY = "opensearch.index";
     private static final boolean REST_EXCEPTION_SKIP_CAUSE_DEFAULT = false;
     protected final Map<String, List<String>> metadata = new HashMap<>();
     protected final Map<String, List<String>> headers = new HashMap<>();
@@ -524,4 +525,12 @@ public String getResourceType() {
         }
         return null;
     }
+
+    public String getIndexName() {
+        List<String> index = getMetadata(INDEX_METADATA_KEY);
+        if (index != null && index.isEmpty() == false) {
+            return index.get(0);
+        }
+        return null;
+    }
 }
diff --git a/server/src/internalClusterTest/java/org/opensearch/search/aggregations/bucket/DateHistogramIT.java b/server/src/internalClusterTest/java/org/opensearch/search/aggregations/bucket/DateHistogramIT.java
index 617c5745c9bba..6f97b8ef40ffe 100644
--- a/server/src/internalClusterTest/java/org/opensearch/search/aggregations/bucket/DateHistogramIT.java
+++ b/server/src/internalClusterTest/java/org/opensearch/search/aggregations/bucket/DateHistogramIT.java
@@ -31,7 +31,7 @@
 
 package org.opensearch.search.aggregations.bucket;
 
-import org.opensearch.OpenSearchException;
+import org.opensearch.BaseOpenSearchException;
 import org.opensearch.action.index.IndexRequestBuilder;
 import org.opensearch.action.search.SearchPhaseExecutionException;
 import org.opensearch.action.search.SearchResponse;
@@ -650,9 +650,9 @@ public void testSingleValuedFieldOrderedByIllegalAgg() throws Exception {
                 .get();
             fail("Expected an exception");
         } catch (SearchPhaseExecutionException e) {
-            OpenSearchException[] rootCauses = e.guessRootCauses();
+            BaseOpenSearchException[] rootCauses = e.guessRootCauses();
             if (rootCauses.length == 1) {
-                OpenSearchException rootCause = rootCauses[0];
+                BaseOpenSearchException rootCause = rootCauses[0];
                 if (rootCause instanceof AggregationExecutionException) {
                     AggregationExecutionException aggException = (AggregationExecutionException) rootCause;
                     assertThat(aggException.getMessage(), Matchers.startsWith("Invalid aggregation order path"));
diff --git a/server/src/internalClusterTest/java/org/opensearch/search/aggregations/bucket/HistogramIT.java b/server/src/internalClusterTest/java/org/opensearch/search/aggregations/bucket/HistogramIT.java
index dae788abe0d10..e56c2b3c713bd 100644
--- a/server/src/internalClusterTest/java/org/opensearch/search/aggregations/bucket/HistogramIT.java
+++ b/server/src/internalClusterTest/java/org/opensearch/search/aggregations/bucket/HistogramIT.java
@@ -32,7 +32,7 @@
 package org.opensearch.search.aggregations.bucket;
 
 import com.carrotsearch.hppc.LongHashSet;
-import org.opensearch.OpenSearchException;
+import org.opensearch.BaseOpenSearchException;
 import org.opensearch.action.index.IndexRequestBuilder;
 import org.opensearch.action.search.SearchPhaseExecutionException;
 import org.opensearch.action.search.SearchResponse;
@@ -689,9 +689,9 @@ public void testSingleValuedFieldOrderedByIllegalAgg() throws Exception {
                 .get();
             fail("Expected an exception");
         } catch (SearchPhaseExecutionException e) {
-            OpenSearchException[] rootCauses = e.guessRootCauses();
+            BaseOpenSearchException[] rootCauses = e.guessRootCauses();
             if (rootCauses.length == 1) {
-                OpenSearchException rootCause = rootCauses[0];
+                BaseOpenSearchException rootCause = rootCauses[0];
                 if (rootCause instanceof AggregationExecutionException) {
                     AggregationExecutionException aggException = (AggregationExecutionException) rootCause;
                     assertThat(aggException.getMessage(), Matchers.startsWith("Invalid aggregation order path"));
diff --git a/server/src/internalClusterTest/java/org/opensearch/search/aggregations/bucket/terms/StringTermsIT.java b/server/src/internalClusterTest/java/org/opensearch/search/aggregations/bucket/terms/StringTermsIT.java
index fa8e823545b36..96b256dc81ce1 100644
--- a/server/src/internalClusterTest/java/org/opensearch/search/aggregations/bucket/terms/StringTermsIT.java
+++ b/server/src/internalClusterTest/java/org/opensearch/search/aggregations/bucket/terms/StringTermsIT.java
@@ -31,6 +31,7 @@
 
 package org.opensearch.search.aggregations.bucket.terms;
 
+import org.opensearch.BaseOpenSearchException;
 import org.opensearch.OpenSearchException;
 import org.opensearch.action.search.SearchPhaseExecutionException;
 import org.opensearch.action.search.SearchResponse;
@@ -420,9 +421,9 @@ public void testSingleValuedFieldOrderedByIllegalAgg() throws Exception {
                 .get();
             fail("Expected an exception");
         } catch (SearchPhaseExecutionException e) {
-            OpenSearchException[] rootCauses = e.guessRootCauses();
+            BaseOpenSearchException[] rootCauses = e.guessRootCauses();
             if (rootCauses.length == 1) {
-                OpenSearchException rootCause = rootCauses[0];
+                BaseOpenSearchException rootCause = rootCauses[0];
                 if (rootCause instanceof AggregationExecutionException) {
                     AggregationExecutionException aggException = (AggregationExecutionException) rootCause;
                     assertThat(aggException.getMessage(), startsWith("Invalid aggregation order path"));
diff --git a/server/src/main/java/org/opensearch/OpenSearchException.java b/server/src/main/java/org/opensearch/OpenSearchException.java
index a11a76bb3c904..705a82574ca5e 100644
--- a/server/src/main/java/org/opensearch/OpenSearchException.java
+++ b/server/src/main/java/org/opensearch/OpenSearchException.java
@@ -88,7 +88,6 @@ public class OpenSearchException extends BaseOpenSearchException implements ToXC
      */
     private static final int CUSTOM_ELASTICSEARCH_EXCEPTIONS_BASE_ID = 10000;
 
-    private static final String INDEX_METADATA_KEY = "opensearch.index";
     private static final String INDEX_METADATA_KEY_UUID = "opensearch.index_uuid";
     private static final String SHARD_METADATA_KEY = "opensearch.shard";
 
diff --git a/server/src/main/java/org/opensearch/action/search/SearchPhaseExecutionException.java b/server/src/main/java/org/opensearch/action/search/SearchPhaseExecutionException.java
index 6b3decba09c45..b129536930c56 100644
--- a/server/src/main/java/org/opensearch/action/search/SearchPhaseExecutionException.java
+++ b/server/src/main/java/org/opensearch/action/search/SearchPhaseExecutionException.java
@@ -123,7 +123,7 @@ public Throwable getCause() {
         Throwable cause = super.getCause();
         if (cause == null) {
             // fall back to guessed root cause
-            for (OpenSearchException rootCause : guessRootCauses()) {
+            for (BaseOpenSearchException rootCause : guessRootCauses()) {
                 return rootCause;
             }
         }
@@ -174,14 +174,14 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
     }
 
     @Override
-    public OpenSearchException[] guessRootCauses() {
+    public BaseOpenSearchException[] guessRootCauses() {
         ShardOperationFailedException[] failures = ExceptionsHelper.groupBy(shardFailures);
         List<BaseOpenSearchException> rootCauses = new ArrayList<>(failures.length);
         for (ShardOperationFailedException failure : failures) {
             BaseOpenSearchException[] guessRootCauses = BaseOpenSearchException.guessRootCauses(failure.getCause());
             rootCauses.addAll(Arrays.asList(guessRootCauses));
         }
-        return rootCauses.toArray(new OpenSearchException[0]);
+        return rootCauses.toArray(new BaseOpenSearchException[0]);
     }
 
     @Override
diff --git a/server/src/test/java/org/opensearch/OpenSearchExceptionTests.java b/server/src/test/java/org/opensearch/OpenSearchExceptionTests.java
index 203903f56b280..adc75f917c751 100644
--- a/server/src/test/java/org/opensearch/OpenSearchExceptionTests.java
+++ b/server/src/test/java/org/opensearch/OpenSearchExceptionTests.java
@@ -175,14 +175,14 @@ public void testGuessRootCause() {
                 "all shards failed",
                 new ShardSearchFailure[] { failure, failure1, failure2 }
             );
-            final OpenSearchException[] rootCauses = ex.guessRootCauses();
+            final BaseOpenSearchException[] rootCauses = ex.guessRootCauses();
             assertEquals(rootCauses.length, 2);
             assertEquals(BaseOpenSearchException.getExceptionName(rootCauses[0]), "parsing_exception");
             assertEquals(rootCauses[0].getMessage(), "foobar");
             assertEquals(1, ((ParsingException) rootCauses[0]).getLineNumber());
             assertEquals(2, ((ParsingException) rootCauses[0]).getColumnNumber());
             assertEquals("query_shard_exception", BaseOpenSearchException.getExceptionName(rootCauses[1]));
-            assertEquals("foo1", rootCauses[1].getIndex().getName());
+            assertEquals("foo1", rootCauses[1].getIndexName());
             assertEquals("foobar", rootCauses[1].getMessage());
         }