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Bug 690315 - python occasionally fails to build on machines with more than one core
Summary: python occasionally fails to build on machines with more than one core
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: python
Version: 6.1
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Dave Malcolm
QA Contact: Petr Šplíchal
URL:
Whiteboard:
Depends On:
Blocks: 681878
TreeView+ depends on / blocked
 
Reported: 2011-03-23 21:08 UTC by Dave Malcolm
Modified: 2016-06-01 01:47 UTC (History)
2 users (show)

Fixed In Version: python-2.6.6-16.el6
Doc Type: Bug Fix
Doc Text:
A race condition was discovered in python Makefile.pre.in. The "make" command interprets a make rule with two dependents as two copies of the rule. On machines with more than one core, this could lead to race conditions in which the compiler attempted to read a partially-overwritten file. This resulted in syntax or link errors when attempting to build python on machines with multiple cores. A check has been added to prevent this issue.
Clone Of:
: 701277 (view as bug list)
Environment:
Last Closed: 2011-05-19 11:35:50 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2011:0554 0 normal SHIPPED_LIVE Moderate: python security, bug fix, and enhancement update 2011-05-19 11:35:29 UTC

Description Dave Malcolm 2011-03-23 21:08:47 UTC 
Description of problem:
There's a race condition in python Makefile.pre.in, which sometimes leads to compile/link errors on machines with more than one core.

See e.g. http://bugs.python.org/issue10013

Fix is trivial and in Fedora:
  http://pkgs.fedoraproject.org/gitweb/?p=python.git;a=blob;f=python-2.7-fix-parallel-make.patch;h=c43e141f9afba45768af85593a2ff41b5a24e464;hb=b95f6cc2ca6a009f97436c6aa16cfd70547353d9
Comment 8 Laura Bailey 2011-05-10 05:56:27 UTC 
    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
A race condition was discovered in python Makefile.pre.in. The "make" command interprets a make rule with two dependents as two copies of the rule. On machines with more than one core, this could lead to race conditions in which the compiler attempted to read a partially-overwritten file. This resulted in syntax or link errors when attempting to build python on machines with multiple cores. A check has been added to prevent this issue.
Comment 9 errata-xmlrpc 2011-05-19 11:35:50 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0554.html
Comment 10 errata-xmlrpc 2011-05-19 13:07:54 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0554.html
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