[issue18382] multiprocessing's overlapped PipeConnection issues on Windows 8
Roundup Robot added the comment: New changeset 7401a28d3d41 by Steve Dower in branch '3.4': Issue #18382: Zero-length messages are consumed by ReadFile on Windows 8 and later https://hg.python.org/cpython/rev/7401a28d3d41 New changeset 6ccbcf1df7bd by Steve Dower in branch 'default': Issue #18382: Zero-length messages are consumed by ReadFile on Windows 8 and later https://hg.python.org/cpython/rev/6ccbcf1df7bd -- nosy: +python-dev ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18382] multiprocessing's overlapped PipeConnection issues on Windows 8
Changes by Steve Dower steve.do...@microsoft.com: -- resolution: - fixed stage: patch review - resolved status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18382] multiprocessing's overlapped PipeConnection issues on Windows 8
Changes by Steve Dower steve.do...@microsoft.com: -- assignee: - steve.dower components: +Library (Lib), Windows -Extension Modules nosy: +tim.golden, zach.ware stage: needs patch - patch review ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18382] multiprocessing's overlapped PipeConnection issues on Windows 8
Davin Potts added the comment: Steve: FWIW, it looks like a good solution to me. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18382] multiprocessing's overlapped PipeConnection issues on Windows 8
Steve Dower added the comment: Thanks Davin. I got onto a Windows 8 machine and confirmed the behaviour changed there, so the version check in my patch is correct. Anyone opposed to the extra logic and version check? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18382] multiprocessing's overlapped PipeConnection issues on Windows 8
Changes by Davin Potts pyt...@discontinuity.net: -- nosy: +davin ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18382] multiprocessing's overlapped PipeConnection issues on Windows 8
Davin Potts added the comment: Tested Steve's code snippet on Windows 7 64-bit without the patch on default (3.5) and got result: True Not knowing the full history here, I blindly tried on the same Win7 system with 2.7.8 and got a False. Looks like Richard's patches made in #12328 were only applied to 3.3. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18382] multiprocessing's overlapped PipeConnection issues on Windows 8
Steve Dower added the comment: Attached a patch to 3.5 that resolves this, and I'll backport to 3.4. I haven't got access to Windows 7 or 8 right now to test it, but it's fine on Vista without the patch and 8.1 with the patch. It'd be great if people could help check exactly which version of Windows changed the behaviour by running this code and posting their OS and whether the result is True (correct) or False (incorrect): from multiprocessing import Pipe a, b = Pipe() b.send_bytes(b'') a.poll() and a.poll() -- keywords: +patch nosy: +steve.dower Added file: http://bugs.python.org/file38199/18382_1.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18382] multiprocessing's overlapped PipeConnection issues on Windows 8
David Bolen added the comment: I've just brought a Windows 8 buildbot online (bolen-windows8) and can confirm that this test does fail in the 3.4 and 3.x branches, and that it does so consistently even if I execute the steps interactively. -- nosy: +db3l ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18382] multiprocessing's overlapped PipeConnection issues on Windows 8
Antoine Pitrou added the comment: FTR, the buildbot URL: http://buildbot.python.org/all/buildslaves/bolen-windows8 -- nosy: +pitrou ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18382] multiprocessing's overlapped PipeConnection issues on Windows 8
Changes by Antoine Pitrou pit...@free.fr: -- stage: - needs patch versions: +Python 3.5 -Python 3.3 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18382] multiprocessing's overlapped PipeConnection issues on Windows 8
Walter Prins added the comment: What's the process for volunteering a buildbot? Email python-dev? I *might* volunteer to set one up... -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18382] multiprocessing's overlapped PipeConnection issues on Windows 8
R. David Murray added the comment: What information there is is here: http://wiki.python.org/moin/BuildBot. Antoine Pitrou is the current buildbot master and will issue you a password once you are set up, if you decide to do this. You can also talk to us on the #python-dev irc channel. Windows buildbots are the trickiest to get set up and running consistently. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18382] multiprocessing's overlapped PipeConnection issues on Windows 8
R. David Murray added the comment: All the buildbots are volunteer hosted and run, so we need someone to volunteer to run a Windows 8 buildbot. That said, I'm not sure if we are formally supporting Windows 8 yet or not. Actually, given the lack of a buildbot, I suppose the answer is not :) -- nosy: +r.david.murray ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18382] multiprocessing's overlapped PipeConnection issues on Windows 8
New submission from Walter Prins: It appears that Windows 8 (Version 6.2.9200 x64) has introduced changes in behaviour that causes the multiprocessing module's use of overlapped PipeConnection to fail (Python 3.4 32bit and release 3.3.2 32bit). This issue previously existed (see issue #12328 point 1) and was fixed but the fixes for #12328 do not appear to work on Windows 8. Specifically the test test_multiprocessing._TestPoll.test_empty_string fails with message: FAIL: test_empty_string (Lib.test.test_multiprocessing.WithProcessesTestPoll) -- Traceback (most recent call last): File C:\Users\Walter\Documents\src\cpython\Lib\test\test_multiprocessing.py, line 2416, in test_empty_string self.assertEqual(a.poll(), True) AssertionError: False != True Additionally, there appears to be no buildbot for Windows 8 currently, would it be possible to have one set up? -- components: Extension Modules messages: 192431 nosy: wprins priority: normal severity: normal status: open title: multiprocessing's overlapped PipeConnection issues on Windows 8 type: behavior versions: Python 3.3, Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18382] multiprocessing's overlapped PipeConnection issues on Windows 8
Richard Oudkerk added the comment: Does that test always fail? -- nosy: +sbt ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18382] multiprocessing's overlapped PipeConnection issues on Windows 8
Walter Prins added the comment: On 6 July 2013 16:44, Richard Oudkerk rep...@bugs.python.org wrote: Richard Oudkerk added the comment: Does that test always fail? Yes it does. I should've probably added in the original report that the following test (test_strings) also fail, possibly/probably due to the same issue. If you'd like me to post more details please ask. Walter -- nosy: +sbt ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18382 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
