[issue35809] test_concurrent_futures.ProcessPoolForkExecutorDeadlockTest fails intermittently on Travis and passes in verbose mode

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[issue35809] test_concurrent_futures.ProcessPoolForkExecutorDeadlockTest fails intermittently on Travis and passes in verbose mode

STINNER Victor added the comment: Another example: https://travis-ci.org/python/cpython/jobs/506338756 0:06:39 load avg: 4.23 [326/416/1] test_concurrent_futures failed -- running: test_multiprocessing_spawn (1 min 27 sec) Traceback: Thread 0x2b2b1c243700 (most recent call first):

[issue35809] test_concurrent_futures.ProcessPoolForkExecutorDeadlockTest fails intermittently on Travis and passes in verbose mode

STINNER Victor added the comment: > Sample crash : https://travis-ci.org/python/cpython/jobs/483394585#L2781 Some info from pythoninfo, not sure if they are relevant: CC.version: clang version 5.0.0 (tags/RELEASE_500/final) platform.libc_ver: glibc 2.19 platform.platform:

[issue35809] test_concurrent_futures.ProcessPoolForkExecutorDeadlockTest fails intermittently on Travis and passes in verbose mode

New submission from Karthikeyan Singaravelan : I can see this test failing intermittently many times on Travis during the first run and to pass later during a verbose run hence the failure is not visible. I don't know the exact cause and haven't checked the buildbots. Search also didn't