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Windows: use ProactorEventLoop; support SubprocessCluster#9294

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Windows: use ProactorEventLoop; support SubprocessCluster#9294
crusaderky wants to merge 1 commit into
dask:mainfrom
crusaderky:proactorev

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@crusaderky crusaderky changed the title Use ProactorEventLoop on Windows; support SubprocessCluster on Windows Windows: use ProactorEventLoop; support SubprocessCluster Jun 9, 2026
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github-actions Bot commented Jun 9, 2026

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Unit Test Results

See test report for an extended history of previous test failures. This is useful for diagnosing flaky tests.

    40 files  ± 0      40 suites  ±0   14h 52m 10s ⏱️ + 23m 9s
 4 152 tests  -  1   3 964 ✅  -  7    178 💤 ± 0  10 ❌ + 6 
80 801 runs   - 18  76 592 ✅ +14  4 188 💤  - 49  21 ❌ +17 

For more details on these failures, see this check.

Results for commit d36485f. ± Comparison against base commit 6e4ca76.

This pull request removes 1 test.
distributed.deploy.tests.test_subprocess ‑ test_raise_on_windows

♻️ This comment has been updated with latest results.

@crusaderky

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Looks like this makes Windows even more unstable than it already is.

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SelectorEventLoop on Windows does not support subprocesses

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