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Description of problem: When the following test run, they hang the build: test_multiprocessing_fork test_multiprocessing_forkserver test_multiprocessing_spawn This happens with all the Pythons (at lest 3.x) on rawhide. The tests were disabled in python3: https://src.fedoraproject.org/rpms/python3/pull-request/34 Steps to Reproduce: 1. Revert the above mentioned PR 2. Build in Koji (local mock untested yet) Actual results: hangs at test_multiprocessing_fork Expected results: builds Additional info: This is a problem for 3.3, 3.4, 3.5, 3.6, 3.7. Talked about it upstream in https://bugs.python.org/issue31463 See mostly: # python3.6 -m test.regrtest test_multiprocessing_fork test_subprocess Run tests sequentially 0:00:00 load avg: 1.84 [1/2] test_multiprocessing_fork /usr/lib64/python3.6/multiprocessing/semaphore_tracker.py:55: UserWarning: semaphore_tracker: process died unexpectedly, relaunching. Some semaphores might leak. warnings.warn('semaphore_tracker: process died unexpectedly, ' Exception in thread Thread-20: Traceback (most recent call last): File "/usr/lib64/python3.6/threading.py", line 916, in _bootstrap_inner self.run() File "/usr/lib64/python3.6/threading.py", line 864, in run self._target(*self._args, **self._kwargs) File "/usr/lib64/python3.6/multiprocessing/resource_sharer.py", line 139, in _serve signal.pthread_sigmask(signal.SIG_BLOCK, range(1, signal.NSIG)) File "/usr/lib64/python3.6/signal.py", line 60, in pthread_sigmask sigs_set = _signal.pthread_sigmask(how, mask) ValueError: signal number 32 out of range (hangs) ^CProcess Process-178: Traceback (most recent call last): ... KeyboardInterrupt Warning -- multiprocessing.process._dangling was modified by test_multiprocessing_fork Before: <_weakrefset.WeakSet object at 0x7f1873917c88> After: <_weakrefset.WeakSet object at 0x7f188516d978> Warning -- threading._dangling was modified by test_multiprocessing_fork Before: <_weakrefset.WeakSet object at 0x7f1873917d68> After: <_weakrefset.WeakSet object at 0x7f1873917e48> Test suite interrupted by signal SIGINT. 2 tests omitted: test_multiprocessing_fork test_subprocess Total duration: 51 sec Tests result: INTERRUPTED
This apparently is not just a failing test, but multiprocesing entirely broken. See the upstream issue https://bugs.python.org/issue33329 for details, fix is almost ready.
Should be OK in: https://src.fedoraproject.org/rpms/python37/pull-request/18 Harris, could you please wait for the CI, merge (or fix issues) and backport to python3, python35, 34, 33? This is needed in Fedora 29 only, but should not be harmfull in older Fedoras. Thank you
python3: https://src.fedoraproject.org/rpms/python3/pull-request/35