On the mac windows debug test bot, the python tests are constantly failing. I've noticed that passing in -j 1 (to run with only one child process) seems to fix the issue. the stack trace is as follows: $ python ./Tools/Scripts/test-webkitpy -v -j 2 Suppressing most webkitpy logging while running unit tests. Skipping tests in the following modules or packages because they are really, lly, slow: webkitpy.common.checkout.scm.scm_unittest (https://bugs.webkit.org/show_bug.cgi?id=31818; use --all to include) Running the tests ...Traceback (most recent call last): File "/home/buildbot/slave/windows-debug-tests/build/OpenSource/Tools/Scri webkitpy/test/main.py", line 227, in <module> sys.exit(main()) File "/home/buildbot/slave/windows-debug-tests/build/OpenSource/Tools/Scri webkitpy/test/main.py", line 69, in main return not tester.run() File "/home/buildbot/slave/windows-debug-tests/build/OpenSource/Tools/Scri webkitpy/test/main.py", line 119, in run return self._run_tests(names) File "/home/buildbot/slave/windows-debug-tests/build/OpenSource/Tools/Scri webkitpy/test/main.py", line 154, in _run_tests test_runner.run(parallel_tests, self._options.child_processes) File "/home/buildbot/slave/windows-debug-tests/build/OpenSource/Tools/Scri webkitpy/test/runner.py", line 52, in run with message_pool.get(self, self.worker_factory, num_workers) as pool: File "/home/buildbot/slave/windows-debug-tests/build/OpenSource/Tools/Scri webkitpy/common/message_pool.py", line 61, in get return _MessagePool(caller, worker_factory, num_workers, worker_startup_ y_secs, host) File "/home/buildbot/slave/windows-debug-tests/build/OpenSource/Tools/Scri webkitpy/common/message_pool.py", line 79, in __init__ self._messages_to_worker = multiprocessing.Queue() File "/usr/lib/python2.6/multiprocessing/__init__.py", line 213, in Queue return Queue(maxsize) File "/usr/lib/python2.6/multiprocessing/queues.py", line 37, in __init__ self._rlock = Lock() File "/usr/lib/python2.6/multiprocessing/synchronize.py", line 117, in __i _ SemLock.__init__(self, SEMAPHORE, 1, 1) File "/usr/lib/python2.6/multiprocessing/synchronize.py", line 49, in __in sl = self._semlock = _multiprocessing.SemLock(kind, value, maxvalue) OSError: [Errno 17] File exists
On the one mac bot we have, running with j=1 takes about 70 seconds. It is not significantly faster running parallel (around 40 seconds), so we could turn off parallel running to get the bot back online.
Created attachment 165412 [details] Tell Windows bot to use only one child process
Comment on attachment 165412 [details] Tell Windows bot to use only one child process Is there a bug to actually fix the failure?
Comment on attachment 165412 [details] Tell Windows bot to use only one child process Clearing flags on attachment: 165412 Committed r129561: <http://trac.webkit.org/changeset/129561>
All reviewed patches have been landed. Closing bug.