[GitHub] [rocketmq] keranbingaa commented on issue #1465: no check when change topicConfig by tools

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keranbingaa commented on issue #1465: no check when change topicConfig by tools
URL: https://github.com/apache/rocketmq/issues/1465#issuecomment-533389550
 
 
   @duhenglucky when the queue expands, it's more reasonble that we expand readQueue first, and then let consumer listen the queue, we expand writequeue finally, which can make messages consumed timely; when the queue shrinks, in order to avoid messages in queue which will be deleted not consumed, we should shrink writequeue to stop get new message, and then shrink readqueue. no matter expanding or shrinking, the writequeuenum will not be greater than readqueuenum.

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