New submission from Xavier de Gaye:
Occurs on Android that has a broken shared semaphore implementation (issue
26924).
Patch attached.
One of the backtraces:
======================================================================
ERROR: test_handle_called_with_mp_queue (test.test_logging.QueueListenerTest)
----------------------------------------------------------------------
Traceback (most recent call last):
File
"/sdcard/org.bitbucket.pyona/lib/python3.7/multiprocessing/synchronize.py",
line 29, in <modu
le>
from _multiprocessing import SemLock, sem_unlink
ImportError: cannot import name 'sem_unlink'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/sdcard/org.bitbucket.pyona/lib/python3.7/unittest/mock.py", line 1179,
in patched
return func(*args, **keywargs)
File "/sdcard/org.bitbucket.pyona/lib/python3.7/test/test_logging.py", line
3130, in test_handle_c
alled_with_mp_queue
log_queue = multiprocessing.Queue()
File "/sdcard/org.bitbucket.pyona/lib/python3.7/multiprocessing/context.py",
line 102, in Queue
return Queue(maxsize, ctx=self.get_context())
File "/sdcard/org.bitbucket.pyona/lib/python3.7/multiprocessing/queues.py",
line 39, in __init__
from .synchronize import SEM_VALUE_MAX as maxsize
File
"/sdcard/org.bitbucket.pyona/lib/python3.7/multiprocessing/synchronize.py",
line 34, in <modu
le>
" function, see issue 3770.")
ImportError: This platform lacks a functioning sem_open implementation,
therefore, the required sync
hronization primitives needed will not function, see issue 3770.
----------
components: Tests
files: test__multiprocessing_queue.patch
keywords: patch
messages: 280589
nosy: vinay.sajip, xdegaye
priority: normal
severity: normal
stage: patch review
status: open
title: instanciation of multiprocessing.Queue raises ImportError in test_logging
type: behavior
versions: Python 3.5, Python 3.6, Python 3.7
Added file: http://bugs.python.org/file45448/test__multiprocessing_queue.patch
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<http://bugs.python.org/issue28668>
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