fwhezfwhez opened a new issue #592:
URL: https://github.com/apache/rocketmq-client-go/issues/592


   On some cases, some messages keep not-consume-yet and I can't figure why.It 
occurs when a `cardsrv`  app server shares 
    consumer-group-name with another app server `datasrv`. I fix it via using 
two group names for each app-nodes.
   
   Then I guess a group must have consistent subscirbe relatives.
   
   Ok, now I wonder that
   
   If cardsrv has many nodes, in a version upgrading, server nodes must deploy 
one by one. On this case, app group might be kept in a inconsistent subscribe 
relatives.Will It make rocketmq message not reliable (messages kept 
not-consumed forever)?
   
   


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