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Posted to jira@arrow.apache.org by "Micah Kornfield (Jira)" <ji...@apache.org> on 2020/12/01 17:30:00 UTC

[jira] [Created] (ARROW-10784) [Python] Loading pyarrow.compute isn't thread safe

Micah Kornfield created ARROW-10784:
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             Summary: [Python] Loading pyarrow.compute isn't thread safe
                 Key: ARROW-10784
                 URL: https://issues.apache.org/jira/browse/ARROW-10784
             Project: Apache Arrow
          Issue Type: Bug
          Components: Python
    Affects Versions: 2.0.0
            Reporter: Micah Kornfield


When using Arrow in a multithreaded environment it is possible to trigger an initialization race on the pyarrow.compute module when calling Array.flatten.

 

Flatten calls _pc() which imports pyarrow compute but if two threads call flatten at the same time is possible that the global initialization of functions from the registry will be incomplete and therefore cause an AttributeError.



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