Bug 787712 - Threaded python code deadlocks when calling subprocess.Popen()
Summary: Threaded python code deadlocks when calling subprocess.Popen()
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Fedora
Classification: Fedora
Component: python
Version: 16
Hardware: x86_64
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Dave Malcolm
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-02-06 15:25 UTC by Simon Farnsworth
Modified: 2013-02-14 01:10 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-02-14 01:10:08 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)
Patch applied to the F17 SRPM to make Python work again (2.05 KB, patch)
2012-02-07 15:00 UTC, Simon Farnsworth
no flags Details | Diff

Description Simon Farnsworth 2012-02-06 15:25:23 UTC
Description of problem:

We have multithreaded Python code, using the threading module - we call subprocess.Popen() to create new processes. It's deadlocking in Python's posix_fork when it tries to reinitialise the GIL.

http://bugs.python.org/issue13817 refers to the same problem, and http://bugs.python.org/msg152474 lists the fix commits to currently maintained branches.

We're going to patch Python ourselves to fix this, but would appreciate it if Fedora would pick up the upstream fix.

We see the problem in python binaries built from python-2.7.2-5.2.fc16.src.rpm

Comment 1 Simon Farnsworth 2012-02-07 15:00:51 UTC
Created attachment 559976 [details]
Patch applied to the F17 SRPM to make Python work again

For my fix, I applied the attached patch to the F17 python from Koji:

http://koji.fedoraproject.org/koji/buildinfo?buildID=281149

This fixes the bug for me.

Comment 2 Warren Togami 2012-05-02 11:27:25 UTC
The python F17 changelog says:

* Sat Feb 25 2012 Thomas Spura <tomspur> - 2.7.2-20
- fix deadlock issue (#787712)

Does this mean this is fixed?

Comment 3 Fedora End Of Life 2013-01-16 22:37:19 UTC
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Comment 4 Fedora End Of Life 2013-02-14 01:10:12 UTC
Fedora 16 changed to end-of-life (EOL) status on 2013-02-12. Fedora 16 is 
no longer maintained, which means that it will not receive any further 
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