[issue12429] test_io.check_interrupted_write() sporadic failures on FreeBSD 6 on Python 2.7/3.2
Roundup Robot devnull@devnull added the comment: New changeset ad16e4a0ef80 by Victor Stinner in branch '3.2': Issue #12429: Skip interrupted write tests on FreeBSD = 7 http://hg.python.org/cpython/rev/ad16e4a0ef80 -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12429 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12429] test_io.check_interrupted_write() sporadic failures on FreeBSD 6 on Python 2.7/3.2
Changes by STINNER Victor victor.stin...@haypocalc.com: -- resolution: - fixed status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12429 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12429] test_io.check_interrupted_write() sporadic failures on FreeBSD 6 on Python 2.7/3.2
Roundup Robot devnull@devnull added the comment: New changeset a624b86264a4 by Victor Stinner in branch '2.7': Issue #12429: Skip interrupted write tests on FreeBSD = 7 http://hg.python.org/cpython/rev/a624b86264a4 New changeset e924e51e9447 by Victor Stinner in branch '3.2': Issue #12429: Skip interrupted write tests on FreeBSD = 7 http://hg.python.org/cpython/rev/e924e51e9447 New changeset 79d7bcbe88f6 by Victor Stinner in branch 'default': null merge 3.2 http://hg.python.org/cpython/rev/79d7bcbe88f6 -- nosy: +python-dev ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12429 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12429] test_io.check_interrupted_write() sporadic failures on FreeBSD 6 on Python 2.7/3.2
New submission from STINNER Victor victor.stin...@haypocalc.com: test_io.check_interrupted_write() has two threads and a pipe: - reader (thread): read one byte from the pipe - writer (main thread): write 1 MB into the pipe An alarm (SIGALRM) is scheduled in one second. The writer blocks because the pipe buffer is smaller than 1 MB, but it is supposed to fill the pipe. The reader is supposed to exit quickly: the writer wrote a least one byte. The test fails *sometimes* on FreeBSD 6: [ 85/352] test_io Exception in thread Thread-274: Traceback (most recent call last): File /usr/home/db3l/buildarea/3.2.bolen-freebsd/build/Lib/threading.py, line 736, in _bootstrap_inner self.run() File /usr/home/db3l/buildarea/3.2.bolen-freebsd/build/Lib/threading.py, line 689, in run self._target(*self._args, **self._kwargs) File /usr/home/db3l/buildarea/3.2.bolen-freebsd/build/Lib/test/test_io.py, line 2660, in _read s = os.read(r, 1) OSError: [Errno 4] Interrupted system call It is a race condition, this buildbot is very slow. The reader has maybe not enough time to read 1 byte. The test was fixed in Python 3.3 (#11859) by adding pthread_sigmask() (issue #8407) and using it in the test: commit 28b9702a83d1. The problem looks to be specific of FreeBSD 6 and 7 (according to #11859). The easiest solution is to skip the test on these platforms. To workaround the lack of pthread_sigmark(), we can use two processes instead of two threads. But it is maybe too much work just to fix a bug in a test (the bug is not in Python). -- components: IO, Tests messages: 139355 nosy: haypo, neologix priority: normal severity: normal status: open title: test_io.check_interrupted_write() sporadic failures on FreeBSD 6 on Python 2.7/3.2 versions: Python 2.7, Python 3.2 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12429 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12429] test_io.check_interrupted_write() sporadic failures on FreeBSD 6 on Python 2.7/3.2
STINNER Victor victor.stin...@haypocalc.com added the comment: Patch to skip the test on FreeBSD 5, 6 and 7. I was unable to reproduce #11859 on my FreeBSD 8 VM, so I didn't add freebsd8. -- keywords: +patch Added file: http://bugs.python.org/file22506/test_io_skip_freebsd.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12429 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
