guihecheng commented on pull request #2471:
URL: https://github.com/apache/ozone/pull/2471#issuecomment-889646336


   > Ah I understand now thanks for the explanation. This makes sense how the 
triggerHeartbeat causes the interrupt. I did not realize the a snapshot install 
was happening in parallel with the pre-finalize actions. Should we wait for the 
snapshot install to finish before running pre-finalize actions? If we have a 
layout change in the future that involves state machine data I am concerned 
this will be problematic currently.
   
   Oh, that's a good question, I'm not quite sure, but it seems to be more 
clean to have consistent state machine data before we do a upgrade operation.


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