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Posted to issues@arrow.apache.org by "Weston Pace (Jira)" <ji...@apache.org> on 2021/03/12 02:28:00 UTC

[jira] [Created] (ARROW-11942) [C++] If tasks are submitted quickly the thread pool may fail to spin up new threads

Weston Pace created ARROW-11942:
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             Summary: [C++] If tasks are submitted quickly the thread pool may fail to spin up new threads
                 Key: ARROW-11942
                 URL: https://issues.apache.org/jira/browse/ARROW-11942
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
            Reporter: Weston Pace
            Assignee: Weston Pace


Probably only really affects unit tests.  Consider an idle thread pool with 1 thread (ready_count_ == 1).  If `Spawn` is called very quickly it may look like `ready_count_` is still greater than 0 (because `ready_count_` doesn't necessarily decrement by the time `Spawn` returns) and so it will not spin up new threads.



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