rkhachatryan commented on pull request #14051:
URL: https://github.com/apache/flink/pull/14051#issuecomment-729554352


   Thanks for merging!
   
   > Known channels are fully initialized including state persister in task 
thread before being passed to network thread
   
   Before this PR, the fields in known channels weren't `final` (and there is 
no explicit fence). So even being fully initialized, the network thread might 
see them un-initialized


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