curcur edited a comment on pull request #16653:
URL: https://github.com/apache/flink/pull/16653#issuecomment-892379997


   @akalash 
   
   I've looked through the code again, I think we should probably also keep 
   ```      
           timersFinishedFuture.get();
           systemTimersFinishedFuture.get();
   ```
   
   in the task thread as well for the safety purposes. 
   
   I mean we move this two lines of code into the actionExecutor and keep the 
same copy in its origin place.
   
   I think for normal task, actionExecutor is the same task thread, but there 
is also some cases (like sources) that use a   different thread.


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