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[3.13] gh-115634: document ProcessPoolExecutor max_tasks_per_child bug (GH-140897) by miss-islington · Pull Request #143303 · python/cpython · GitHub

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[3.13] gh-115634: document ProcessPoolExecutor max_tasks_per_child bug (GH-140897) #143303

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gpshead merged 1 commit into from
Dec 30, 2025
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[3.13] gh-115634: document ProcessPoolExecutor max_tasks_per_child bug (GH-140897) #143303

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5 changes: 5 additions & 0 deletions Doc/library/concurrent.futures.rst
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Expand Up @@ -278,6 +278,11 @@ in a REPL or a lambda should not be expected to work.
default in absence of a *mp_context* parameter. This feature is incompatible
with the "fork" start method.

.. note::
Bugs have been reported when using the *max_tasks_per_child* feature that
can result in the :class:`ProcessPoolExecutor` hanging in some
circumstances. Follow its eventual resolution in :gh:`115634`.

.. versionchanged:: 3.3
When one of the worker processes terminates abruptly, a
:exc:`~concurrent.futures.process.BrokenProcessPool` error is now raised.
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