codelipenghui commented on a change in pull request #13888:
URL: https://github.com/apache/pulsar/pull/13888#discussion_r794530792



##########
File path: 
pulsar-broker/src/main/java/org/apache/pulsar/broker/admin/impl/PersistentTopicsBase.java
##########
@@ -4704,104 +4704,110 @@ protected void 
internalGetReplicatedSubscriptionStatus(AsyncResponse asyncRespon
         }
 
         // Permission to consume this topic is required
-        try {
-            validateTopicOperation(topicName, 
TopicOperation.GET_REPLICATED_SUBSCRIPTION_STATUS, subName);
-        } catch (Exception e) {
-            resumeAsyncResponseExceptionally(asyncResponse, e);
-            return;
-        }
+        CompletableFuture<Void> validateFuture =
+                validateTopicOperationAsync(topicName, 
TopicOperation.GET_REPLICATED_SUBSCRIPTION_STATUS, subName);
 
+        CompletableFuture<Void> resultFuture;
         // If the topic name is a partition name, no need to get partition 
topic metadata again
         if (topicName.isPartitioned()) {
-            
internalGetReplicatedSubscriptionStatusForNonPartitionedTopic(asyncResponse, 
subName, authoritative);
+            resultFuture = validateFuture.thenAccept(
+                    __ -> 
internalGetReplicatedSubscriptionStatusForNonPartitionedTopic(asyncResponse,
+                            subName, authoritative));
         } else {
-            getPartitionedTopicMetadataAsync(topicName,
-                    authoritative, false).thenAccept(partitionMetadata -> {
-                if (partitionMetadata.partitions > 0) {
-                    final List<CompletableFuture<Map<String, Boolean>>> 
futures = Lists.newArrayList();
-                    final Map<String, Boolean> status = Maps.newHashMap();
+            resultFuture = validateFuture
+                    .thenCompose(__ -> 
getPartitionedTopicMetadataAsync(topicName, authoritative, false))
+                    .thenAccept(partitionMetadata -> {
+                        if (partitionMetadata.partitions > 0) {
+                            final List<CompletableFuture<Map<String, 
Boolean>>> futures = Lists.newArrayList();

Review comment:
       @suiyuzeng Could you please check the comment?




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