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[3.15] gh-153005: Use a monotonic clock for concurrent.interpreters Queue timeouts (GH-154156) - #155967
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serhiy-storchaka merged 1 commit intoOct 10, 2026
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…eue timeouts (pythonGH-154156) Queue.get() and Queue.put() computed their timeout deadline from time.time(), the wall clock. If the system clock was stepped (NTP, a manual change) while a call was blocked, the timeout could over- or under-wait. queue.Queue uses time.monotonic() for the same reason. Compute the deadline and check it against time.monotonic() instead. (cherry picked from commit b94b9c8) Co-authored-by: Vyron Vasileiadis <hi@fedonman.com>
This was referenced Aug 17, 2026
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Queue.get() and Queue.put() computed their timeout deadline from
time.time(), the wall clock. If the system clock was stepped (NTP, a
manual change) while a call was blocked, the timeout could over- or
under-wait. queue.Queue uses time.monotonic() for the same reason.
Compute the deadline and check it against time.monotonic() instead.
(cherry picked from commit b94b9c8)
Co-authored-by: Vyron Vasileiadis hi@fedonman.com