diff --git a/src/integrationTest/java/org/opensearch/test/framework/matcher/AliasExistsMatcher.java b/src/integrationTest/java/org/opensearch/test/framework/matcher/AliasExistsMatcher.java
index 4999da8e95..4d8c81b037 100644
--- a/src/integrationTest/java/org/opensearch/test/framework/matcher/AliasExistsMatcher.java
+++ b/src/integrationTest/java/org/opensearch/test/framework/matcher/AliasExistsMatcher.java
@@ -10,7 +10,6 @@
 package org.opensearch.test.framework.matcher;
 
 import java.util.Collection;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -18,7 +17,6 @@
 import java.util.stream.Collectors;
 import java.util.stream.StreamSupport;
 
-import com.carrotsearch.hppc.cursors.ObjectObjectCursor;
 import org.hamcrest.Description;
 import org.hamcrest.TypeSafeDiagnosingMatcher;
 
@@ -44,11 +42,7 @@ protected boolean matchesSafely(Client client, Description mismatchDescription)
 		try {
 			GetAliasesResponse response = client.admin().indices().getAliases(new GetAliasesRequest(aliasName)).get();
 
-			final Map<String, List<AliasMetadata>> aliases = new HashMap<>();
-			for (ObjectObjectCursor<String, List<AliasMetadata>> cursor : response.getAliases()) {
-				aliases.put(cursor.key, cursor.value);
-			}
-
+			Map<String, List<AliasMetadata>> aliases = response.getAliases();
 			Set<String> actualAliasNames = StreamSupport.stream(spliteratorUnknownSize(aliases.values().iterator(), IMMUTABLE), false)
 					.flatMap(Collection::stream)
 					.map(AliasMetadata::getAlias)
@@ -61,7 +55,7 @@ protected boolean matchesSafely(Client client, Description mismatchDescription)
 			return true;
 		} catch (InterruptedException | ExecutionException e) {
 			mismatchDescription.appendText("Error occurred during checking if cluster contains alias ")
-				.appendValue(e);
+					.appendValue(e);
 			return false;
 		}
 	}
diff --git a/src/integrationTest/java/org/opensearch/test/framework/matcher/ClusterContainTemplateWithAliasMatcher.java b/src/integrationTest/java/org/opensearch/test/framework/matcher/ClusterContainTemplateWithAliasMatcher.java
index d59792e715..861aaa72e7 100644
--- a/src/integrationTest/java/org/opensearch/test/framework/matcher/ClusterContainTemplateWithAliasMatcher.java
+++ b/src/integrationTest/java/org/opensearch/test/framework/matcher/ClusterContainTemplateWithAliasMatcher.java
@@ -9,14 +9,12 @@
 */
 package org.opensearch.test.framework.matcher;
 
-import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 import java.util.stream.StreamSupport;
 
-import com.carrotsearch.hppc.cursors.ObjectObjectCursor;
 import org.hamcrest.Description;
 import org.hamcrest.TypeSafeDiagnosingMatcher;
 
@@ -57,13 +55,7 @@ protected boolean matchesSafely(Client client, Description mismatchDescription)
 	private Set<String> getAliases(GetIndexTemplatesResponse response) {
 		return response.getIndexTemplates()
 				.stream()
-				.map(metadata -> {
-							Map<String, AliasMetadata> aliases = new HashMap<>();
-							for (ObjectObjectCursor<String, AliasMetadata> cursor : metadata.getAliases()) {
-								aliases.put(cursor.key, cursor.value);
-							}
-							return aliases;
-						})
+				.map(metadata -> metadata.getAliases())
 				.flatMap(aliasMap -> aliasNames(aliasMap))
 				.collect(Collectors.toSet());
 	}
diff --git a/src/integrationTest/java/org/opensearch/test/framework/matcher/GetSettingsResponseContainsIndicesMatcher.java b/src/integrationTest/java/org/opensearch/test/framework/matcher/GetSettingsResponseContainsIndicesMatcher.java
index 79ac1c64ac..01f14dd044 100644
--- a/src/integrationTest/java/org/opensearch/test/framework/matcher/GetSettingsResponseContainsIndicesMatcher.java
+++ b/src/integrationTest/java/org/opensearch/test/framework/matcher/GetSettingsResponseContainsIndicesMatcher.java
@@ -9,14 +9,11 @@
 */
 package org.opensearch.test.framework.matcher;
 
-import java.util.HashMap;
-import java.util.Map;
-
-import com.carrotsearch.hppc.cursors.ObjectObjectCursor;
 import org.hamcrest.Description;
 import org.hamcrest.TypeSafeDiagnosingMatcher;
 
 import org.opensearch.action.admin.indices.settings.get.GetSettingsResponse;
+import org.opensearch.common.collect.ImmutableOpenMap;
 import org.opensearch.common.settings.Settings;
 
 import static java.util.Objects.isNull;
@@ -35,15 +32,12 @@ class GetSettingsResponseContainsIndicesMatcher extends TypeSafeDiagnosingMatche
 	@Override
 	protected boolean matchesSafely(GetSettingsResponse response, Description mismatchDescription) {
 
-		final Map<String, Settings> indexToSettings = new HashMap<>();
-		for (ObjectObjectCursor<String, Settings> cursor : response.getIndexToSettings()) {
-			indexToSettings.put(cursor.key, cursor.value);
-		}
+		final ImmutableOpenMap<String, Settings> indexToSettings = response.getIndexToSettings();
 		for (String index : expectedIndices) {
 			if (!indexToSettings.containsKey(index)) {
 				mismatchDescription
 						.appendText("Response contains settings of indices: ")
-						.appendValue(indexToSettings.keySet());
+						.appendValue(indexToSettings.keys());
 				return false;
 			}
 		}
diff --git a/src/main/java/org/opensearch/security/privileges/PrivilegesEvaluator.java b/src/main/java/org/opensearch/security/privileges/PrivilegesEvaluator.java
index b77b7a000f..8f490d180d 100644
--- a/src/main/java/org/opensearch/security/privileges/PrivilegesEvaluator.java
+++ b/src/main/java/org/opensearch/security/privileges/PrivilegesEvaluator.java
@@ -29,7 +29,6 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
-import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
@@ -38,7 +37,6 @@
 import java.util.StringJoiner;
 import java.util.regex.Pattern;
 
-import com.carrotsearch.hppc.cursors.ObjectObjectCursor;
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Sets;
 import org.apache.logging.log4j.LogManager;
@@ -674,10 +672,7 @@ public Iterator<IndexMetadata> iterator() {
 
             final List<AliasMetadata> filteredAliases = new ArrayList<AliasMetadata>();
 
-            final Map<String, AliasMetadata> aliases = new HashMap<>();
-            for (ObjectObjectCursor<String, AliasMetadata> cursor : indexMetaData.getAliases()) {
-                aliases.put(cursor.key, cursor.value);
-            }
+            final Map<String, AliasMetadata> aliases = indexMetaData.getAliases();
 
             if(aliases != null && aliases.size() > 0) {
                 if (isDebugEnabled) {