wegod commented on issue #5479:
URL: https://github.com/apache/rocketmq/issues/5479#issuecomment-1306713829

   I think you have the same issue I had  before. 
   
   If you have several projects use same consumer group, check all your 
consumer project code whether there is a consumer don't call subscribe method.
   
   All consumer in same consumer group must call subscribe method to bind the 
same consumer group subscription. If a consumer only call start method, then it 
will clean consumer group subscription. 
   
   This is because of 
https://rocketmq.apache.org/zh/docs/4.x/bestPractice/21subscribe 
   
   And I think this clean design is very strange which cost several hours to 
fix the deep bug.


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