Dream95 commented on code in PR #25916:
URL: https://github.com/apache/pulsar/pull/25916#discussion_r3339780338


##########
pulsar-client/src/main/java/org/apache/pulsar/client/impl/MultiTopicsConsumerImpl.java:
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@@ -1300,8 +1300,10 @@ public CompletableFuture<Void> unsubscribeAsync(String 
topicName) {
                     });
 
                     removeTopic(topicName);
-                    if (unAckedMessageTracker instanceof 
UnAckedTopicMessageTracker) {
-                        ((UnAckedTopicMessageTracker) 
unAckedMessageTracker).removeTopicMessages(topicName);
+                    if (unAckedMessageTracker instanceof 
UnAckedTopicMessageTracker tracker) {
+                        tracker.removeTopicMessages(topicName);
+                    } else if (unAckedMessageTracker instanceof 
UnAckedTopicMessageRedeliveryTracker tracker){
+                        tracker.removeTopicMessages(topicName);
                     }

Review Comment:
   They share the same base class , but removeTopicMessages is not declared on 
that base type.



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