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Posted to jira@arrow.apache.org by "Alessandro Molina (Jira)" <ji...@apache.org> on 2021/12/20 15:57:00 UTC
[jira] [Updated] (ARROW-13763) [Python] Files opened for read with pyarrow.parquet are not explicitly closed
[ https://issues.apache.org/jira/browse/ARROW-13763?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Alessandro Molina updated ARROW-13763:
--------------------------------------
Fix Version/s: 8.0.0
(was: 7.0.0)
> [Python] Files opened for read with pyarrow.parquet are not explicitly closed
> -----------------------------------------------------------------------------
>
> Key: ARROW-13763
> URL: https://issues.apache.org/jira/browse/ARROW-13763
> Project: Apache Arrow
> Issue Type: Bug
> Components: Parquet, Python
> Affects Versions: 5.0.0
> Environment: fsspec 2021.4.0
> Reporter: Richard Kimoto
> Assignee: Alessandro Molina
> Priority: Major
> Fix For: 8.0.0
>
> Attachments: test.py
>
>
> It appears that files opened for read using pyarrow.parquet.read_table (and therefore pyarrow.parquet.ParquetDataset) are not explicitly closed.
> This seems to be the case for both use_legacy_dataset=True and False. The files don't remain open at the os level (verified using lsof). They do however seem to rely on the python gc to close.
> My use case is that i'd like to use a custom fsspec filesystem that interfaces to an s3 like API. It handles the remote download of the parquet file and passes to pyarrow a handle of a temporary file downloaded locally. It then is looking for an explicit close() or __exit__() to then clean up the temp file.
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