Address test hanging in coverage workflow

[stinodego]

The Python coverage workflow regularly hangs - leading to the job taking 6 hours and then terminating due to the job time limit. We should figure out what causes this.

It happens when ASYNC is enabled. Here's some example logs:

ss.s.s.s................................................................ [  8%]
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thread 'polars-3' panicked at /Users/runner/work/polars/polars/crates/polars-io/src/parquet/read/read_impl.rs:763:58:
called `Result::unwrap()` on an `Err` value: (Ok([shape: (3, 2)
┌─────┬─────┐
│ a   ┆ b   │
│ --- ┆ --- │
│ i64 ┆ i64 │
╞═════╪═════╡
│ 1   ┆ 4   │
│ 2   ┆ 5   │
│ 3   ┆ 6   │
└─────┴─────┘]), 3, 18446744073709551612)
stack backtrace:
......................................................................... [ 67%]
......................................................sss.......xs...... [ 75%]
Fatal Python error: Aborted

Thread 0x0000700002968000 (most recent call first):
..[gw3] node down: Not properly terminated
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 534 in read
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 567 in from_io
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 1160 in _thread_receiver
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 341 in run
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 411 in _perform_spawn

Thread 0x00007ff859e9c7c0 (most recent call first):
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/pyarrow/dataset.py", line 486 in _filesystem_dataset
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/pyarrow/dataset.py", line 794 in dataset
  File "/Users/runner/work/polars/polars/py-polars/tests/unit/io/test_pyarrow_dataset.py", line 22 in helper_dataset_test
  File "/Users/runner/work/polars/polars/py-polars/tests/unit/io/test_pyarrow_dataset.py", line 150 in test_dataset_foo
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/_pytest/python.py", line 162 in pytest_pyfunc_call
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/pluggy/_callers.py", line 103 in _multicall
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/pluggy/_manager.py", line 120 in _hookexec
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/pluggy/_hooks.py", line 513 in __call__
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/_pytest/python.py", line 16[32](https://github.com/pola-rs/polars/actions/runs/9763018518/job/26947877229?pr=17359#step:12:33) in runtest
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/_pytest/runner.py", line 173 in pytest_runtest_call
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/pluggy/_callers.py", line 103 in _multicall
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/pluggy/_manager.py", line 120 in _hookexec
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/pluggy/_hooks.py", line 513 in __call__
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/_pytest/runner.py", line 241 in <lambda>
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/_pytest/runner.py", line 341 in from_call
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/_pytest/runner.py", line 240 in call_and_report
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/_pytest/runner.py", line 135 in runtestprotocol
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/_pytest/runner.py", line 116 in pytest_runtest_protocol
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/pluggy/_callers.py", line 103 in _multicall
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/pluggy/_manager.py", line 120 in _hookexec
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/pluggy/_hooks.py", line 513 in __call__
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/xdist/remote.py", line 195 in run_one_test
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/xdist/remote.py", line 174 in pytest_runtestloop
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/pluggy/_callers.py", line 103 in _multicall
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/pluggy/_manager.py", line 120 in _hookexec
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/pluggy/_hooks.py", line 513 in __call__
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/_pytest/main.py", line [33](https://github.com/pola-rs/polars/actions/runs/9763018518/job/26947877229?pr=17359#step:12:34)9 in _main
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/_pytest/main.py", line 285 in wrap_session
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/_pytest/main.py", line 332 in pytest_cmdline_main
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/pluggy/_callers.py", line 103 in _multicall
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/pluggy/_manager.py", line 120 in _hookexec
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/pluggy/_hooks.py", line 513 in __call__
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/xdist/remote.py", line 393 in <module>
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 1291 in executetask
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/execnet/gateway_base.py", line [34](https://github.com/pola-rs/polars/actions/runs/9763018518/job/26947877229?pr=17359#step:12:35)1 in run
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 411 in _perform_spawn
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 389 in integrate_as_primary_thread
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 1273 in serve
  File "/Users/runner/work/polars/polars/.venv/lib/python3.12/site-packages/execnet/gateway_base.py", line 1806 in serve
  File "<string>", line 8 in <module>
  File "<string>", line 1 in <module>

Extension modules: numpy.core._multiarray_umath, numpy.core._multiarray_tests, numpy.linalg._umath_linalg, numpy.fft._pocketfft_internal, numpy.random._common, numpy.random.bit_generator, numpy.random._bounded_integers, numpy.random._mt199[37](https://github.com/pola-rs/polars/actions/runs/9763018518/job/26947877229?pr=17359#step:12:38), numpy.random.mtrand, numpy.random._philox, numpy.random._pcg64, numpy.random._sfc64, numpy.random._generator, yaml._yaml, markupsafe._speedups, sqlalchemy.cyextension.collections, sqlalchemy.cyextension.immutabledict, sqlalchemy.cyextension.processors, sqlalchemy.cyextension.resultproxy, sqlalchemy.cyextension.util, greenlet._greenlet, pyarrow.lib, zstandard.backend_c, pyarrow._fs, pyarrow._azurefs, pyarrow._hdfs, pyarrow._gcsfs, pyarrow._s3fs, pyarrow._compute, pyarrow._acero, pyarrow._csv, pyarrow._json, pandas._libs.tslibs.ccalendar, pandas._libs.tslibs.np_datetime, pandas._libs.tslibs.dtypes, pandas._libs.tslibs.base, pandas._libs.tslibs.nattype, pandas._libs.tslibs.timezones, pandas._libs.tslibs.fields, pandas._libs.tslibs.timedeltas, pandas._libs.tslibs.tzconversion, pandas._libs.tslibs.timestamps, pandas._libs.properties, pandas._libs.tslibs.offsets, pandas._libs.tslibs.strptime, pandas._libs.tslibs.parsing, pandas._libs.tslibs.conversion, pandas._libs.tslibs.period, pandas._libs.tslibs.vectorized, pandas._libs.ops_dispatch, pandas._libs.missing, pandas._libs.hashtable, pandas._libs.algos, pandas._libs.interval, pandas._libs.lib, pandas._libs.ops, pandas._libs.hashing, pandas._libs.arrays, pandas._libs.tslib, pandas._libs.sparse, pandas._libs.internals, pandas._libs.indexing, pandas._libs.index, pandas._libs.writers, pandas._libs.join, pandas._libs.window.aggregations, pandas._libs.window.indexers, pandas._libs.reshape, pandas._libs.groupby, pandas._libs.json, pandas._libs.parsers, pandas._libs.testing, pyarrow._dataset, pyarrow._dataset_orc, pyarrow._parquet, pyarrow._parquet_encryption, pyarrow._dataset_parquet_encryption, pyarrow._dataset_parquet, adbc_driver_manager._lib, adbc_driver_manager._reader (total: 80)
F
replacing crashed worker gw3
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Links to some failed workflows:

• https://github.com/pola-rs/polars/actions/runs/9763018518/job/26947877229?pr=17359
• https://github.com/pola-rs/polars/actions/runs/9778038482/job/26993982656?pr=17397
• https://github.com/pola-rs/polars/actions/runs/9866934337/job/27246507130?pr=17536