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

miss-islington · gpshead · web-flow · commit 823b50e1d037 · 2025-12-30T23:32:08.000Z
gh-115634: document ProcessPoolExecutor max_tasks_per_child bug (GH-140897) (cherry picked from commit 04899b8) Co-authored-by: Gregory P. Smith <68491+gpshead@users.noreply.github.com>
diff --git a/Doc/library/concurrent.futures.rst b/Doc/library/concurrent.futures.rst
@@ -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.
