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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/02/04 05:44:15 UTC

[GitHub] [arrow] framlog commented on issue #12329: An unhandled race condition exists in `ThreadPool`

framlog commented on issue #12329:
URL: https://github.com/apache/arrow/issues/12329#issuecomment-1029665533


   You are right.  
   
   The fix that I give is to use 0 as an intermediate state(we set `pid_` to 0 when we try to reset everything and then set `pid_` to the `current_pid_`). Other threads entering this block checks `old_pid != 0 && pid_.compare_exchange_strong(old_pid, 0)` to figure out whether they need to spin or not. (`old_pid` is the value read before we do the check).  At least it passes my local tests. 


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