New submission from Karthikeyan Singaravelan <tir.kar...@gmail.com>:
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 bring up anything so I thought to file a new issue for this.
Stack trace :
======================================================================
FAIL: test_crash
(test.test_concurrent_futures.ProcessPoolForkExecutorDeadlockTest) [crash at
task unpickle]
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/travis/build/python/cpython/Lib/test/test_concurrent_futures.py",
line 958, in test_crash
res.result(timeout=self.TIMEOUT)
File "/home/travis/build/python/cpython/Lib/concurrent/futures/_base.py",
line 438, in result
raise TimeoutError()
concurrent.futures._base.TimeoutError
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/travis/build/python/cpython/Lib/test/test_concurrent_futures.py",
line 962, in test_crash
self._fail_on_deadlock(executor)
File "/home/travis/build/python/cpython/Lib/test/test_concurrent_futures.py",
line 910, in _fail_on_deadlock
self.fail(f"Executor deadlock:\n\n{tb}")
AssertionError: Executor deadlock:
Thread 0x00002b5105ca3700 (most recent call first):
File "/home/travis/build/python/cpython/Lib/threading.py", line 296 in wait
File "/home/travis/build/python/cpython/Lib/multiprocessing/queues.py", line
227 in _feed
File "/home/travis/build/python/cpython/Lib/threading.py", line 865 in run
File "/home/travis/build/python/cpython/Lib/threading.py", line 917 in
_bootstrap_inner
File "/home/travis/build/python/cpython/Lib/threading.py", line 885 in
_bootstrap
Thread 0x00002b510584c700 (most recent call first):
File "/home/travis/build/python/cpython/Lib/selectors.py", line 415 in select
File "/home/travis/build/python/cpython/Lib/multiprocessing/connection.py",
line 930 in wait
File "/home/travis/build/python/cpython/Lib/concurrent/futures/process.py",
line 354 in _queue_management_worker
File "/home/travis/build/python/cpython/Lib/threading.py", line 865 in run
File "/home/travis/build/python/cpython/Lib/threading.py", line 917 in
_bootstrap_inner
File "/home/travis/build/python/cpython/Lib/threading.py", line 885 in
_bootstrap
Current thread 0x00002b50fe39c9c0 (most recent call first):
File "/home/travis/build/python/cpython/Lib/test/test_concurrent_futures.py",
line 901 in _fail_on_deadlock
File "/home/travis/build/python/cpython/Lib/test/test_concurrent_futures.py",
line 962 in test_crash
File "/home/travis/build/python/cpython/Lib/unittest/case.py", line 642 in run
File "/home/travis/build/python/cpython/Lib/unittest/case.py", line 702 in
__call__
File "/home/travis/build/python/cpython/Lib/unittest/suite.py", line 122 in
run
File "/home/travis/build/python/cpython/Lib/unittest/suite.py", line 84 in
__call__
File "/home/travis/build/python/cpython/Lib/unittest/suite.py", line 122 in
run
File "/home/travis/build/python/cpython/Lib/unittest/suite.py", line 84 in
__call__
File "/home/travis/build/python/cpython/Lib/unittest/suite.py", line 122 in
run
File "/home/travis/build/python/cpython/Lib/unittest/suite.py", line 84 in
__call__
File "/home/travis/build/python/cpython/Lib/unittest/runner.py", line 176 in
run
File "/home/travis/build/python/cpython/Lib/test/support/__init__.py", line
1935 in _run_suite
File "/home/travis/build/python/cpython/Lib/test/support/__init__.py", line
2031 in run_unittest
File "/home/travis/build/python/cpython/Lib/test/test_concurrent_futures.py",
line 1241 in test_main
File "/home/travis/build/python/cpython/Lib/test/support/__init__.py", line
2163 in decorator
File "/home/travis/build/python/cpython/Lib/test/libregrtest/runtest.py",
line 182 in runtest_inner
File "/home/travis/build/python/cpython/Lib/test/libregrtest/runtest.py",
line 127 in runtest
File "/home/travis/build/python/cpython/Lib/test/libregrtest/runtest_mp.py",
line 68 in run_tests_worker
File "/home/travis/build/python/cpython/Lib/test/libregrtest/main.py", line
600 in _main
File "/home/travis/build/python/cpython/Lib/test/libregrtest/main.py", line
586 in main
File "/home/travis/build/python/cpython/Lib/test/libregrtest/main.py", line
640 in main
File "/home/travis/build/python/cpython/Lib/test/regrtest.py", line 46 in
_main
File "/home/travis/build/python/cpython/Lib/test/regrtest.py", line 50 in
<module>
File "/home/travis/build/python/cpython/Lib/runpy.py", line 85 in _run_code
File "/home/travis/build/python/cpython/Lib/runpy.py", line 192 in
_run_module_as_main
Sample crash : https://travis-ci.org/python/cpython/jobs/483394585#L2781
----------
components: Tests
messages: 334255
nosy: bquinlan, pablogsal, pitrou, vstinner, xtreak
priority: normal
severity: normal
status: open
title: test_concurrent_futures.ProcessPoolForkExecutorDeadlockTest fails
intermittently on Travis and passes in verbose mode
versions: Python 3.8
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue35809>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
