[New-bugs-announce] [issue38212] test_multiprocessing_spawn: test_queue_feeder_donot_stop_onexc() failed on x86 Windows7 3.x
STINNER Victor
report at bugs.python.org
Wed Sep 18 05:21:37 EDT 2019
New submission from STINNER Victor <vstinner at python.org>:
x86 Windows7 3.x:
https://buildbot.python.org/all/#/builders/58/builds/3015
If I recall correctly, this buildbot is known to be slow.
It sounds like a race condition.
ERROR: test_queue_feeder_donot_stop_onexc (test.test_multiprocessing_spawn.WithProcessesTestQueue)
----------------------------------------------------------------------
Traceback (most recent call last):
File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows7\build\lib\test\_test_multiprocessing.py", line 1132, in test_queue_feeder_donot_stop_onexc
self.assertTrue(q.get(timeout=1.0))
File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows7\build\lib\multiprocessing\queues.py", line 108, in get
raise Empty
_queue.Empty
Extract of the test:
def test_queue_feeder_donot_stop_onexc(self):
# bpo-30414: verify feeder handles exceptions correctly
if self.TYPE != 'processes':
self.skipTest('test not appropriate for {}'.format(self.TYPE))
class NotSerializable(object):
def __reduce__(self):
raise AttributeError
with test.support.captured_stderr():
q = self.Queue()
q.put(NotSerializable())
q.put(True)
# bpo-30595: use a timeout of 1 second for slow buildbots
self.assertTrue(q.get(timeout=1.0)) # <===== FAIL HERE =====
close_queue(q)
...
Hum, "bpo-30595: use a timeout of 1 second for slow buildbots" sounds like this test depends on time which is bad for reliable tests. Would it be possible to use a more reliable synchronization primitive?
If no solution is found, the workaround is to use a timeout of 60 seconds instead of just 1 second...
----------
components: Tests
messages: 352712
nosy: pablogsal, vstinner
priority: normal
severity: normal
status: open
title: test_multiprocessing_spawn: test_queue_feeder_donot_stop_onexc() failed on x86 Windows7 3.x
versions: Python 3.9
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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38212>
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