holdenk commented on pull request #31298:
URL: https://github.com/apache/spark/pull/31298#issuecomment-767082051


   > So to double check that we still ensure that we don't schedule tasks on 
the decommissioning executor (or there's really a race condition or it's just a 
coincidence), I'd like to know the previous task failures for this task (TID = 
8). e.g., what are failures reasons for previous attempts? And which executors 
are scheduled?
   
   Yes so to be clear I got this while executing in a tight loop of test code 
wherein I intentionally scheduled the job. I'm not sure this race condition can 
occur in the "real world" to the point the task actually fails, but we might 
abort some started computation which is undeseriable (but not a major issue).


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