[GitHub] [rocketmq] coder-zzzz commented on a change in pull request #1985: [ISSUE 1976] system topic should not be create or delete by user

[GitBox <gi...@apache.org>]

coder-zzzz commented on a change in pull request #1985:
URL: https://github.com/apache/rocketmq/pull/1985#discussion_r424843127



##########
File path: broker/src/main/java/org/apache/rocketmq/broker/processor/AdminBrokerProcessor.java
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@@ -285,7 +273,19 @@ private synchronized RemotingCommand updateAndCreateTopic(ChannelHandlerContext
 
         this.brokerController.registerIncrementBrokerData(topicConfig, this.brokerController.getTopicConfigManager().getDataVersion());
 
-        return null;
+        response.setCode(ResponseCode.SUCCESS);
+        return response;
+    }
+
+    private boolean isSystemTopic(RemotingCommand response, String topic) {
+        if (this.brokerController.getTopicConfigManager().isSystemTopic(topic)) {
+            String errorMsg = "the topic[" + topic + "] is conflict with system reserved words.";
+            log.warn(errorMsg);

Review comment:
       errorMsg used in log and response's remark, so it is better to use a local var to store it




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