Weston Pace created ARROW-17198:
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Summary: [C++] Potential memory leak at shutdown if an exec plan
with a scanner fails or is aborted immediately before shutdown
Key: ARROW-17198
URL: https://issues.apache.org/jira/browse/ARROW-17198
Project: Apache Arrow
Issue Type: Bug
Components: C++
Reporter: Weston Pace
I'm primarily creating this so we can remember to make a test for this. This
problem should be solved as part of ARROW-16072. When the scanner fails it
simply discards references to the various scanner AsyncGenerators. However,
some I/O tasks may still have references to these generators and so some parts
of the scanner survive after the plan itself is marked complete. If there is
an immediate shutdown then these parts will not be properly disposed of even
though the plan is marked complete and it will show up as a memory leak.
Example:
https://pipelines.actions.githubusercontent.com/serviceHosts/8bb0d999-3387-4c48-9fa6-c66c718a46e2/_apis/pipelines/1/runs/359690/signedlogcontent/4?urlExpires=2022-07-25T14%3A43%3A01.2797488Z&urlSigningMethod=HMACV1&urlSignature=GS3lS09Q9sTRweN%2B8UEu2GwUGc%2FbO9eyH27FRKumbrg%3D
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