diff --git a/pulsar-broker/src/main/java/org/apache/pulsar/broker/admin/impl/NamespacesBase.java b/pulsar-broker/src/main/java/org/apache/pulsar/broker/admin/impl/NamespacesBase.java
index 670ba95e348665..e3e9d6d0f0d513 100644
--- a/pulsar-broker/src/main/java/org/apache/pulsar/broker/admin/impl/NamespacesBase.java
+++ b/pulsar-broker/src/main/java/org/apache/pulsar/broker/admin/impl/NamespacesBase.java
@@ -50,6 +50,7 @@
 import javax.ws.rs.core.Response.Status;
 import javax.ws.rs.core.UriBuilder;
 import org.apache.bookkeeper.mledger.LedgerOffloader;
+import org.apache.commons.collections4.CollectionUtils;
 import org.apache.commons.collections4.ListUtils;
 import org.apache.commons.lang.mutable.MutableObject;
 import org.apache.commons.lang3.StringUtils;
@@ -267,8 +268,13 @@ protected void internalDeleteNamespace(AsyncResponse asyncResponse, boolean auth
         Set<String> partitionedTopicNames = new HashSet<>();
         Set<String> topicNames = new HashSet<>();
         try {
-            partitionedTopicNames.addAll(pulsar().getNamespaceService().getFullListOfTopics(namespaceName)
-                    .get(config().getMetadataStoreOperationTimeoutSeconds(), TimeUnit.SECONDS));
+            if (policies == null || CollectionUtils.isEmpty(policies.replication_clusters)){
+                partitionedTopicNames.addAll(pulsar().getNamespaceService().getListOfPersistentTopics(namespaceName)
+                        .get(config().getMetadataStoreOperationTimeoutSeconds(), TimeUnit.SECONDS));
+            } else {
+                partitionedTopicNames.addAll(pulsar().getNamespaceService().getFullListOfTopics(namespaceName)
+                        .get(config().getMetadataStoreOperationTimeoutSeconds(), TimeUnit.SECONDS));
+            }
             topicNames.addAll(getPartitionedTopicList(TopicDomain.persistent));
             topicNames.addAll(getPartitionedTopicList(TopicDomain.non_persistent));
             isEmpty = partitionedTopicNames.isEmpty() && topicNames.isEmpty();