RongtongJin commented on code in PR #7502:
URL: https://github.com/apache/rocketmq/pull/7502#discussion_r1372505132


##########
broker/src/main/java/org/apache/rocketmq/broker/processor/AdminBrokerProcessor.java:
##########
@@ -440,6 +440,11 @@ private synchronized RemotingCommand 
updateAndCreateTopic(ChannelHandlerContext
             return response;
         }
 
+        if 
(topicConfig.equals(this.brokerController.getTopicConfigManager().getTopicConfigTable().get(topic)))
 {
+            response.setCode(ResponseCode.SUCCESS);
+            return response;
+        }

Review Comment:
   It would be better to add a log indicating that the topic already exists and 
will no longer be created or updated repeatedly.



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