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

["Alexey Strokach (JIRA)" <ji...@apache.org>]

Alexey Strokach created ARROW-3346:
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             Summary: 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


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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