bxfjb commented on issue #7790:
URL: https://github.com/apache/rocketmq/issues/7790#issuecomment-2014291125

   > Since the consumption progress is synchronized every 10 seconds, if this 
mechanism does not change, in theory, repeated consumption will occur as long 
as a master-slave switch occurs. A synchronization mechanism may be needed to 
ensure that the consumption progress is synchronized.
   
   Actually the consumption synchronization period is modified to 3s in latest 
code, so that the repeated consumption you mentioned should decrease a lot. To 
reduce the remaining repeat, #7901 now explicitly call syncAll after register 
broker infomation.


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