[issue31687] test_semaphore_tracker() of test_multiprocessing_spawn fails randomly (race condition?)

[STINNER Victor]

STINNER Victor <victor.stinner at gmail.com> added the comment:

To reproduce the issue, someone should increase the system load to make the system slower and make timeouts more likely, and change the order in which processes are run. I'm using the "stress" utility on Linux for that. But sometimes, the best stress tool... is the Python test suite, since running the full test suite in multiple processes in parallel (./python -m test -j0 -r) runs various workloads, and so sometimes trigger bugs which would be very hard to trigger othewise.

Terminal 1: run "./python -m test -j0 -r", stress or anything else to make the system slower

Terminal 2: run "./python -m test test_multiprocessing_fork -m test_semaphore_tracker -F -v" which runs the test in a loop until it fails.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31687>
_______________________________________