poorbarcode commented on code in PR #15363:
URL: https://github.com/apache/pulsar/pull/15363#discussion_r860667133


##########
pulsar-broker/src/main/java/org/apache/pulsar/broker/service/persistent/PersistentTopic.java:
##########
@@ -3060,7 +3060,21 @@ public void onUpdate(TopicPolicies policies) {
                 checkReplicationAndRetryOnFailure();
             }
 
-            checkDeduplicationStatus();
+            /**
+             * When execute command "pulsar-admin topicPolicies 
get-deduplication persistent://{tenant}/{ns}/{topic}"
+             * but "store.asyncRemoveCursor('pulsar.dedup')" failure, the 
'pulsar-dedup' cursor will be disabled,
+             * zk-node: 
"/managed-ledgers/{tenant}/{ns}/persistent/{topic}/pulsar.dedup" still exists.
+             * Then this topic's ledger-store will not be deleted anymore, 
even if all message has been acknowledged.
+             * So when `checkDeduplicationStatus()` failure, stop this topic.
+             */
+            try {
+                checkDeduplicationStatus().get();

Review Comment:
   Why ? I tried it , it works.



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