lizhanhui commented on a change in pull request #312: [ISSUE#311] Improve 
broker register topicrouter info performance
URL: https://github.com/apache/rocketmq/pull/312#discussion_r190183861
 
 

 ##########
 File path: 
broker/src/main/java/org/apache/rocketmq/broker/processor/AdminBrokerProcessor.java
 ##########
 @@ -245,7 +245,10 @@ private RemotingCommand 
updateAndCreateTopic(ChannelHandlerContext ctx,
         topicConfig.setTopicSysFlag(requestHeader.getTopicSysFlag() == null ? 
0 : requestHeader.getTopicSysFlag());
 
         
this.brokerController.getTopicConfigManager().updateTopicConfig(topicConfig);
-        this.brokerController.registerBrokerAll(false, true, true);
+
+        if (brokerController.getBrokerConfig().getRegisterNameServerPeriod() 
== 0) {
+            this.brokerController.registerBrokerAll(false, true, true);
 
 Review comment:
   This results in extra complexities to existing users and deployments.

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