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gh-157184: Scale the join() alarm in the multiprocessing kill tests by iamsharduld · Pull Request #157185 · python/cpython · GitHub

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gh-157184: Scale the join() alarm in the multiprocessing kill tests #157185

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iamsharduld wants to merge 2 commits into from
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gh-157184: Scale the join() alarm in the multiprocessing kill tests #157185

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gh-157184: Scale the join() alarm in the multiprocessing kill tests
iamsharduld Sep 8, 2026
f1e0152
Remove the NEWS entry
iamsharduld Sep 8, 2026
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6 changes: 5 additions & 1 deletion Lib/test/_test_multiprocessing.py
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@
import time
import io
import itertools
import math
import sys
import os
import gc
Expand Down Expand Up @@ -624,11 +625,14 @@ def _kill_process(self, meth, target=None):
if hasattr(signal, 'alarm'):
# On the Gentoo buildbot waitpid() often seems to block forever.
# We use alarm() to interrupt it if it blocks for too long.
# The timeout only has to catch a hang, so use LONG_TIMEOUT:
# a shorter one fires on a slow build where reaping the child
# legitimately takes a while.
def handler(*args):
raise RuntimeError('join took too long: %s' % p)
old_handler = signal.signal(signal.SIGALRM, handler)
try:
signal.alarm(10)
signal.alarm(math.ceil(support.LONG_TIMEOUT))
self.assertEqual(join(), None)
finally:
signal.alarm(0)
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