Issue 31246: [2.7] test_signal.test_setitimer_tiny() fails randomly on x86-64 El Capitan 2.7 (original) (raw)

This issue has been migrated to GitHub: https://github.com/python/cpython/issues/75429

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Created on 2017-08-21 14:21 by vstinner, last changed 2022-04-11 14:58 by admin. This issue is now closed.

Messages (5)
msg300626 - (view)	Author: STINNER Victor (vstinner) *	Date: 2017-08-21 14:21
http://buildbot.python.org/all/builders/x86-64%20El%20Capitan%202.7/builds/161/steps/test/logs/stdio 0:04:49 [173/403/1] test_signal failed test test_signal failed -- Traceback (most recent call last): File "/Users/buildbot/buildarea/2.7.billenstein-elcapitan/build/Lib/test/test_signal.py", line 500, in test_setitimer_tiny self.assertEqual(self.hndl_called, True) AssertionError: False != True
msg300627 - (view)	Author: STINNER Victor (vstinner) *	Date: 2017-08-21 14:31
It's related to bpo-30807, "setitimer() can disable timer by mistake". Test code: def test_setitimer_tiny(self): # bpo-30807: C setitimer() takes a microsecond-resolution interval. # Check that float -> timeval conversion doesn't round # the interval down to zero, which would disable the timer. self.itimer = signal.ITIMER_REAL signal.setitimer(self.itimer, 1e-6) time.sleep(1) self.assertEqual(self.hndl_called, True)
msg300628 - (view)	Author: STINNER Victor (vstinner) *	Date: 2017-08-21 14:33
It seems like build 161 is the first since build 142 which failed. I don't see this failure in recent 3.6 and 3.x builds. So the failure seems very rare.
msg300629 - (view)	Author: STINNER Victor (vstinner) *	Date: 2017-08-21 15:16
I wrote https://github.com/python/cpython/pull/3165 "[2.7] bpo-30263: regrtest: add system load average", it might help to understand why test_signal fails randomly (check if there is a correlation with the system load).
msg318114 - (view)	Author: STINNER Victor (vstinner) *	Date: 2018-05-29 21:59
I didn't see the failure recently. I close the issue.