New submission from Kenneth Chik <[email protected]>:
I am not sure if this is python or OS problem, I just installed Ubuntu 18.04
LTS which comes with python3 v3.6.4. When I try to unittest code which contains
multiprocessing.Pool with spawn, the unittest.main() blocks after completing
all the tests. This problem did not exist on prior versions of Ubuntu/Python.
Below is the printout after I KeyboardInterrupt the process.
...
----------------------------------------------------------------------
Ran 13 tests in 10.472s
OK
^CException ignored in: <module 'threading' from
'/usr/lib/python3.6/threading.py'>
Traceback (most recent call last):
File "/usr/lib/python3.6/threading.py", line 1294, in _shutdown
t.join()
File "/usr/lib/python3.6/threading.py", line 1056, in join
self._wait_for_tstate_lock()
File "/usr/lib/python3.6/threading.py", line 1072, in _wait_for_tstate_lock
elif lock.acquire(block, timeout):
KeyboardInterrupt
The spawned processes have all completed and not visible on the process list,
but the semaphore_tracker process is still there. This is the same with
previous working system though. Thanks.
----------
messages: 313648
nosy: Kenneth Chik
priority: normal
severity: normal
status: open
title: unittest blocks when testing function using multiprocessing.Pool with
state spawn
type: behavior
versions: Python 3.6
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Python tracker <[email protected]>
<https://bugs.python.org/issue33054>
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