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test_eintr.test_os_open hangs under Xcode 7 #69421
Description
| BPO | 25234 |
|---|---|
| Nosy | @brettcannon, @ronaldoussoren, @vstinner, @ned-deily, @vadmium |
| PRs |
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 = 'https://github.com/brettcannon'
closed_at = <Date 2016-01-22.23:56:16.166>
created_at = <Date 2015-09-25.19:41:19.347>
labels = ['OS-mac', 'type-bug']
title = 'test_eintr.test_os_open hangs under Xcode 7'
updated_at = <Date 2019-05-21.21:24:57.813>
user = 'https://github.com/brettcannon'bugs.python.org fields:
activity = <Date 2019-05-21.21:24:57.813>
actor = 'ned.deily'
assignee = 'brett.cannon'
closed = True
closed_date = <Date 2016-01-22.23:56:16.166>
closer = 'brett.cannon'
components = ['macOS']
creation = <Date 2015-09-25.19:41:19.347>
creator = 'brett.cannon'
dependencies = []
files = []
hgrepos = []
issue_num = 25234
keywords = []
message_count = 14.0
messages = ['251597', '251647', '251650', '253084', '253099', '253101', '256280', '256315', '256337', '257155', '258351', '258399', '258848', '259150']
nosy_count = 6.0
nosy_names = ['brett.cannon', 'ronaldoussoren', 'vstinner', 'ned.deily', 'python-dev', 'martin.panter']
pr_nums = ['10449', '10449']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue25234'
versions = ['Python 3.5', 'Python 3.6']
Activity
brettcannon commentedon Sep 25, 2015
Specifically:
Apple LLVM version 7.0.0 (clang-700.0.72)
Target: x86_64-apple-darwin14.5.0
Thread model: posix
I'm assuming this is a Mac issue since none of the buildbots are having a similar issue.
ned-deily commentedon Sep 26, 2015
Brett, was this on OS X 10.10.x or a 10.11 pre-release? test_eintr does not fail fail for me on either using the most recent Xcode 7.
[-]test_einter.test_os_open hangs under Xcode 7[/-][+]test_eintr.test_os_open hangs under Xcode 7[/+]brettcannon commentedon Sep 26, 2015
It is 10.10, but apparently a reboot fixed it (software, am I right? =/ ).
brettcannon commentedon Oct 16, 2015
This is still an intermittent problem for me. Maybe it's related to issue bpo-25122 ?
vstinner commentedon Oct 16, 2015
Hi Brett, if you are motivated, you can try the C program that I wrote to reproduce the bug on FreeBSD. It's attached to bpo-25122. If the C program hangs too, it would mean that Darwin has also a bug (same bug??) in its code to handle signals in the code handling FIFO devices.
Or you can just add a skip mentioning this issue.
On my FreeBSD VM, it took a few minutes and multiples instances of the C program to reproduce the bug. On physical machines, other reported that a seconds and a single instance is enough. Well, see the FreeBSD bug report for more information ;-)
brettcannon commentedon Oct 16, 2015
I can't get your testing program to compile, Victor, so if I run into it again I will add a skip to the test (harder to detect that it's the same test since test_eintr runs another test suite as if it's a single test).
vadmium commentedon Dec 12, 2015
The Yosemite ICC 3.5 buildbot seems to be intermittently hanging test_os_open() and test_open(). Currently it shows five builds. Build 396 hung at test_os_open(); build 400 hung at test_open(), and the other three passed.
http://buildbot.python.org/all/builders/x86-64%20Yosemite%20ICC%20Debug%203.5
Slave information
Buildbot-Slave 0.8.12
OSX 10.10.3 (Yosemite) Mac Mini VMWare VM 2x2.86 GHz 8GB
brettcannon commentedon Dec 13, 2015
I'm still getting the occasional hang for this so I'm going to skip the test under OS X.
vstinner commentedon Dec 13, 2015
Go ahead. I'm not interested to analyze bugs of closed source kernels.
python-dev commentedon Dec 29, 2015
New changeset 7fc1296d1acf by Brett Cannon in branch 'default':
Issue bpo-25234: Skip test_eintr.test_os_open under OS X.
https://hg.python.org/cpython/rev/7fc1296d1acf
vadmium commentedon Jan 16, 2016
Brett, do you think you should also skip test_open()? The same buildbot recently failed again in that method.
brettcannon commentedon Jan 16, 2016
Sure, that test can be skipped as well if it is hanging.
python-dev commentedon Jan 22, 2016
New changeset 9d65a195246b by Brett Cannon in branch 'default':
Issue bpo-25234: Skip test_eintr.test_open() under OS X to avoid hanging
https://hg.python.org/cpython/rev/9d65a195246b
python-dev commentedon Jan 28, 2016
New changeset ddce15b21c21 by Victor Stinner in branch '3.5':
Backport fixes on test_eintr
https://hg.python.org/cpython/rev/ddce15b21c21