pitrou opened a new issue, #41149: URL: https://github.com/apache/arrow/issues/41149
### Describe the bug, including details regarding any error messages, version, and platform. We see sporadic CI failures in `test_dataset_join_asof_empty_by`. Example: https://github.com/ursacomputing/crossbow/actions/runs/8597009571/job/23554761859#step:10:787 ``` =================================== FAILURES =================================== _______________________ test_dataset_join_asof_empty_by ________________________ tempdir = PosixPath('/tmp/pytest-of-root/pytest-0/test_dataset_join_asof_empty_b0') @pytest.mark.dataset def test_dataset_join_asof_empty_by(tempdir): t1 = pa.table({ "on": [1, 2, 3], }) ds.write_dataset(t1, tempdir / "t1", format="ipc") ds1 = ds.dataset(tempdir / "t1", format="ipc") t2 = pa.table({ "colVals": ["Z", "B", "A"], "on": [2, 3, 4], }) ds.write_dataset(t2, tempdir / "t2", format="ipc") ds2 = ds.dataset(tempdir / "t2", format="ipc") result = ds1.join_asof( ds2, on="on", by=[], tolerance=1 ) > assert result.to_table() == pa.table({ "on": [1, 2, 3], "colVals": ["Z", "Z", "B"], }) E assert pyarrow.Table...null,"Z","B"]] == pyarrow.Table...["Z","Z","B"]] E E Use -v to get more diff usr/local/lib/python3.9/site-packages/pyarrow/tests/test_dataset.py:5154: AssertionError ``` The useful information is unfortunately truncated by stupid pytest, but we can still see that there is a `null` value somewhere in the `colVals` result, which is probably unexpected. ### Component(s) C++, Python -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
