[jira] [Resolved] (ARROW-3346) [Python] Segfault when reading parquet files if torch is imported before pyarrow

["Uwe L. Korn (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-3346?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Uwe L. Korn resolved ARROW-3346.
--------------------------------
    Resolution: Won't Fix

> [Python] Segfault when reading parquet files if torch is imported before pyarrow
> --------------------------------------------------------------------------------
>
>                 Key: ARROW-3346
>                 URL: https://issues.apache.org/jira/browse/ARROW-3346
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Python
>    Affects Versions: 0.10.0
>            Reporter: Alexey Strokach
>            Priority: Major
>
> pyarrow (version 0.10.0) appears to crash sporadically with a segmentation fault when reading parquet files if it is used in a program where torch is imported first.
> A self-contained example is available here: [https://gitlab.com/ostrokach/pyarrow_pytorch_segfault].
> Basically, running
> {{python -X faulthandler -c "import torch; import pyarrow.parquet as pq; _ = pq.ParquetFile('example.parquet').read_row_group(0)"}}
> sooner or later results in a segfault:
> {{Fatal Python error: Segmentation fault}}
> {{Current thread 0x00007f52959bb740 (most recent call first):}}
> {{File "/home/kimlab1/strokach/anaconda/lib/python3.6/site-packages/pyarrow/parquet.py", line 125 in read_row_group}}
>  {{File "<string>", line 1 in <module>}}
>  {{./test_fail.sh: line 5: 42612 Segmentation fault (core dumped) python -X faulthandler -c "import torch; import pyarrow.parquet as pq; _ = pq.ParquetFile('example.parquet').read_row_group(0)"}}
> The number of iterations before a segfault varies, but it usually happens within the first several calls.
> Running
> {{python -X faulthandler -c "import pyarrow.parquet as pq import torch; _ = pq.ParquetFile('example.parquet').read_row_group(0)"}}
> works without a problem.



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