[issue38546] test_concurrent_futures: test_interpreter_shutdown() warning "reap_children() reaped child process" on AMD64 RHEL7 3.x

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

The system load was at 10.02 when the bug occurred:

> https://buildbot.python.org/all/#/builders/254/builds/162

...
0:04:11 load avg: 10.02 [230/419] test_pkgutil passed -- running: test_io (2 min 46 sec), test_capi (1 min 12 sec), test_concurrent_futures (2 min 43 sec), test_mailbox (2 min 40 sec), test_tokenize (30.6 sec)
0:04:12 load avg: 10.02 [231/419] test_getpass passed -- running: test_io (2 min 47 sec), test_capi (1 min 13 sec), test_concurrent_futures (2 min 43 sec), test_mailbox (2 min 41 sec), test_tokenize (31.1 sec)
0:04:12 load avg: 10.02 [232/419] test_sys passed -- running: test_io (2 min 47 sec), test_capi (1 min 13 sec), test_concurrent_futures (2 min 43 sec), test_mailbox (2 min 41 sec), test_tokenize (31.3 sec)
0:04:12 load avg: 10.02 [233/419] test_winconsoleio skipped -- running: test_io (2 min 48 sec), test_capi (1 min 13 sec), test_concurrent_futures (2 min 44 sec), test_mailbox (2 min 41 sec), test_tokenize (31.7 sec)
test_winconsoleio skipped -- test only relevant on win32
0:04:13 load avg: 10.02 [234/419/1] test_concurrent_futures failed (env changed) (2 min 44 sec) -- running: test_io (2 min 48 sec), test_capi (1 min 14 sec), test_mailbox (2 min 42 sec), test_tokenize (32.0 sec)
...
test_crash (test.test_concurrent_futures.ProcessPoolSpawnExecutorDeadlockTest) ... 4.22s ok
test_shutdown_deadlock (test.test_concurrent_futures.ProcessPoolSpawnExecutorDeadlockTest) ... 1.03s ok
test_initializer (test.test_concurrent_futures.ProcessPoolSpawnFailingInitializerTest) ... 0.51s ok
test_initializer (test.test_concurrent_futures.ProcessPoolSpawnInitializerTest) ... 0.54s ok
test_free_reference (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolExecutorTest) ... 0.67s ok
test_killed_child (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolExecutorTest) ... 0.49s ok
test_map (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolExecutorTest) ... 0.56s ok
test_map_chunksize (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolExecutorTest) ... 0.46s ok
test_map_exception (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolExecutorTest) ... 0.46s ok
test_map_timeout (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolExecutorTest) ... 6.48s ok
test_max_workers_negative (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolExecutorTest) ... 0.57s ok
test_max_workers_too_large (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolExecutorTest) ... skipped 'Windows-only process limit'
test_no_stale_references (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolExecutorTest) ... 0.56s ok
test_ressources_gced_in_workers (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolExecutorTest) ... 1.90s ok
test_shutdown_race_issue12456 (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolExecutorTest) ... 0.54s ok
test_submit (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolExecutorTest) ... 0.52s ok
test_submit_keyword (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolExecutorTest) ... 0.57s ok
test_traceback (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolExecutorTest) ... 0.48s ok
test_context_manager_shutdown (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolShutdownTest) ... 0.03s ok
test_del_shutdown (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolShutdownTest) ... 0.02s ok
test_hang_issue12364 (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolShutdownTest) ... 1.45s ok
test_interpreter_shutdown (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolShutdownTest) ... 1.62s 
Warning -- reap_children() reaped child process 28936
ok
test_processes_terminate (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolShutdownTest) ... 0.47s ok
test_run_after_shutdown (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolShutdownTest) ... 0.00s ok

----------

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38546>
_______________________________________