[issue35012] [3.7] test_multiprocessing_spawn hangs randomly on AppVeyor

STINNER Victor added the comment: I haven't seen this bug for 2 months, I'm unable to reproduce the bug and I don't know how to fix it. I close the bug as out of date. Reopen it if it comes back. -- resolution: -> out of date stage: -> resolved status: open -> closed _

[issue35012] [3.7] test_multiprocessing_spawn hangs randomly on AppVeyor

STINNER Victor added the comment: Extract of bpo-34714: File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows7\build\lib\multiprocessing\spawn.py", line 107, in spawn_main new_handle = reduction.duplicate(pipe_handle, File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows7\build\lib\

[issue35012] [3.7] test_multiprocessing_spawn hangs randomly on AppVeyor

STINNER Victor added the comment: I identified a race condition: https://bugs.python.org/issue33966 https://github.com/python/cpython/pull/7966 -- ___ Python tracker ___

[issue35012] [3.7] test_multiprocessing_spawn hangs randomly on AppVeyor

STINNER Victor added the comment: Question: why faulthandler didn't kill the test after 15 min? .github/appveyor.yml runs the test suite using --timeout=1200. Extract of logs: --- PCbuild\rt.bat -q -uall -u-cpu -u-largefile -rwW --slowest --timeout=1200 --fail-env-changed -j0 C:\projects\cpyt

[issue35012] [3.7] test_multiprocessing_spawn hangs randomly on AppVeyor

New submission from STINNER Victor : On AppVeyor CI, test_multiprocessing_spawn was running for longer than 50 min, whereas usually it only takes around 2 minutes https://ci.appveyor.com/project/python/cpython/builds/19594644 ... running: test_multiprocessing_spawn (50 min 33 sec) running: te