test_asyncio: test_cancel_make_subprocess_transport_exec() hangs randomly on PPC64LE Fedora 3.x

[vstinner]

BPO	39238
Nosy	@vstinner, @asvetlov, @1st1, @pablogsal

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2020-02-07.10:57:54.318>
created_at = <Date 2020-01-06.22:16:59.767>
labels = ['tests', '3.9', 'expert-asyncio']
title = 'test_asyncio: test_cancel_make_subprocess_transport_exec() hangs randomly on PPC64LE Fedora 3.x'
updated_at = <Date 2020-02-07.10:57:54.317>
user = 'https://github.com/vstinner'

bugs.python.org fields:

activity = <Date 2020-02-07.10:57:54.317>
actor = 'vstinner'
assignee = 'none'
closed = True
closed_date = <Date 2020-02-07.10:57:54.318>
closer = 'vstinner'
components = ['Tests', 'asyncio']
creation = <Date 2020-01-06.22:16:59.767>
creator = 'vstinner'
dependencies = []
files = []
hgrepos = []
issue_num = 39238
keywords = []
message_count = 3.0
messages = ['359473', '359906', '361585']
nosy_count = 4.0
nosy_names = ['vstinner', 'asvetlov', 'yselivanov', 'pablogsal']
pr_nums = []
priority = 'normal'
resolution = 'out of date'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue39238'
versions = ['Python 3.9']

[vstinner]

PPC64LE Fedora 3.x buildbot:
https://buildbot.python.org/all/#builders/11/builds/134

0:35:30 load avg: 0.00 [420/420/1] test_asyncio crashed (Exit code 1)
Timeout (0:15:00)!
Thread 0x00003fff82de5330 (most recent call first):
File "/home/shager/cpython-buildarea/3.x.edelsohn-fedora-ppc64le/build/Lib/selectors.py", line 468 in select
File "/home/shager/cpython-buildarea/3.x.edelsohn-fedora-ppc64le/build/Lib/asyncio/base_events.py", line 1852 in _run_once
File "/home/shager/cpython-buildarea/3.x.edelsohn-fedora-ppc64le/build/Lib/asyncio/base_events.py", line 596 in run_forever
File "/home/shager/cpython-buildarea/3.x.edelsohn-fedora-ppc64le/build/Lib/asyncio/base_events.py", line 629 in run_until_complete
File "/home/shager/cpython-buildarea/3.x.edelsohn-fedora-ppc64le/build/Lib/test/test_asyncio/test_subprocess.py", line 441 in test_cancel_make_subprocess_transport_exec
(...)
0:35:30 load avg: 0.00 Re-running test_asyncio in verbose mode
(...)
test_shell_loop_deprecated (test.test_asyncio.test_subprocess.SubprocessFastWatcherTests) ... ok
test_start_new_session (test.test_asyncio.test_subprocess.SubprocessFastWatcherTests) ... ok
test_stdin_broken_pipe (test.test_asyncio.test_subprocess.SubprocessFastWatcherTests) ... ok
test_stdin_not_inheritable (test.test_asyncio.test_subprocess.SubprocessFastWatcherTests) ... ok
test_stdin_stdout (test.test_asyncio.test_subprocess.SubprocessFastWatcherTests) ... ok
test_terminate (test.test_asyncio.test_subprocess.SubprocessFastWatcherTests) ... ok
Timeout (0:15:00)!
Thread 0x00003fffb25e5330 (most recent call first):
File "/home/shager/cpython-buildarea/3.x.edelsohn-fedora-ppc64le/build/Lib/selectors.py", line 468 in select
File "/home/shager/cpython-buildarea/3.x.edelsohn-fedora-ppc64le/build/Lib/asyncio/base_events.py", line 1852 in _run_once
File "/home/shager/cpython-buildarea/3.x.edelsohn-fedora-ppc64le/build/Lib/asyncio/base_events.py", line 596 in run_forever
File "/home/shager/cpython-buildarea/3.x.edelsohn-fedora-ppc64le/build/Lib/asyncio/base_events.py", line 629 in run_until_complete
File "/home/shager/cpython-buildarea/3.x.edelsohn-fedora-ppc64le/build/Lib/test/test_asyncio/test_subprocess.py", line 441 in test_cancel_make_subprocess_transport_exec
....

[vstinner]

AMD64 RHEL7 LTO + PGO 3.8:
https://buildbot.python.org/all/#/builders/83/builds/76

...
test_terminate (test.test_asyncio.test_subprocess.SubprocessFastWatcherTests) ... ok
Timeout (0:15:00)!
Thread 0x00007f070075a740 (most recent call first):
File "/home/buildbot/buildarea/3.8.cstratak-RHEL7-x86_64.lto-pgo/build/Lib/selectors.py", line 468 in select
File "/home/buildbot/buildarea/3.8.cstratak-RHEL7-x86_64.lto-pgo/build/Lib/asyncio/base_events.py", line 1823 in _run_once
File "/home/buildbot/buildarea/3.8.cstratak-RHEL7-x86_64.lto-pgo/build/Lib/asyncio/base_events.py", line 570 in run_forever
File "/home/buildbot/buildarea/3.8.cstratak-RHEL7-x86_64.lto-pgo/build/Lib/asyncio/base_events.py", line 603 in run_until_complete
File "/home/buildbot/buildarea/3.8.cstratak-RHEL7-x86_64.lto-pgo/build/Lib/test/test_asyncio/test_subprocess.py", line 440 in test_cancel_make_subprocess_transport_exec
File "/home/buildbot/buildarea/3.8.cstratak-RHEL7-x86_64.lto-pgo/build/Lib/unittest/case.py", line 633 in _callTestMethod

[vstinner]

It only failed twice, I didn't see this issue recently, I close the issue.