[GitHub] RongtongJin commented on issue #466: [ISSUE #465] topic should be added to topicList instead of clu…

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RongtongJin commented on issue #466: [ISSUE #465] topic should be added to topicList instead of clu…
URL: https://github.com/apache/rocketmq/pull/466#issuecomment-423037072
 
 
   I think my understanding of systemTopicList is incorrect. Firstly, I thought that getSystemTopicList means getting all the topic names, then I read the code carefully yesterday and found [RouteInfoManager.getAllTopicList()](https://github.com/apache/rocketmq/blob/a220364b752669c474f9795884faed9bb4e0a8c1/namesrv/src/main/java/org/apache/rocketmq/namesrv/routeinfo/RouteInfoManager.java#L86) has done this. I traced the call chain of getSystemToplicList and found [MQClientAPIImpl.getSystemTopicList()](https://github.com/apache/rocketmq/blob/a220364b752669c474f9795884faed9bb4e0a8c1/client/src/main/java/org/apache/rocketmq/client/impl/MQClientAPIImpl.java#L1600) is the last method called, so RouteManagerInfo.getSystemTopicList() never be called? ? ? 
   At the same time, I found some systemTopic will be added in [rocketmq.broker.topic.TopicConfigManager#TopicConfigManager()](https://github.com/apache/rocketmq/blob/a220364b752669c474f9795884faed9bb4e0a8c1/broker/src/main/java/org/apache/rocketmq/broker/topic/TopicConfigManager.java#L57) when the BrokerController is initialized, including the brokerName and cluster name. So the cluster name and broker name should be added to the systemTopicList. I am sorry, I will read the code more carefully.

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