#1064368 python-xarray: intermittent segfault in test_open_mfdataset_manyfiles[netcdf4-20-True-*-5]

Package:
python3-xarray
Source:
python3-xarray
Submitter:
Rebecca N. Palmer
Date:
2026-10-01 17:37:07 UTC
Severity:
normal
Tags:
#1064368#5
Date:
2024-02-20 21:13:48 UTC
From:
To:
xarray sometimes (~10% of the time) segfaults in
tests/test_backends.py::test_open_mfdataset_manyfiles, usually
[netcdf4-20-True-None-5] but sometimes [netcdf4-20-True-5-5].

This has happened in both Python 3.11 and 3.12, and on various
architectures:
https://ci.debian.net/packages/p/python-xarray/testing/amd64/43068287/
https://ci.debian.net/packages/p/python-xarray/testing/armhf/42545225/
https://ci.debian.net/packages/p/python-xarray/testing/s390x/43076980/
https://ci.debian.net/packages/p/python-xarray/testing/ppc64el/42673240/
#1064368#10
Date:
2024-02-21 19:08:35 UTC
From:
To:
The above upstream report suggests that this is because netcdf-python is
no longer thread-safe.

The 3 random-autopkgtest-fail bugs (this, #1064326 and #1064370)
together seem to be more common in pandas 2.  It's possible that some of
them are actually the same underlying bug.