Bug 1215192 - random segfaults with worker MPM
Summary: random segfaults with worker MPM
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Software Collections
Classification: Red Hat
Component: mod_perl
Version: rh-perl524
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: 2.3
Assignee: perl-maint-list
QA Contact: Martin Kyral
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2015-04-24 14:15 UTC by Martin Frodl
Modified: 2016-11-15 10:05 UTC (History)
2 users (show)

Fixed In Version: rh-perl524-mod_perl-2.0.9-6.el6 rh-perl524-mod_perl-2.0.9-6.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-11-15 10:05:00 UTC
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)
valgrind output (43.23 KB, text/plain)
2015-04-27 07:49 UTC, Jan Kaluža
no flags Details


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHEA-2016:2729 0 normal SHIPPED_LIVE new packages: rh-perl524 2016-11-15 14:38:28 UTC

Description Martin Frodl 2015-04-24 14:15:34 UTC
Perhaps the same issue as bug 1199779.

Description of problem:

When httpd MPM worker is running with mod_perl enabled, some of the worker processes segfault randomly.

How reproducible:
Sometimes. I ran into this behaviour on several systems, but was not able to reproduce it on others.

Steps to Reproduce:
# echo LoadModule mpm_worker_module modules/mod_mpm_worker.so > /opt/rh/httpd24/root/etc/httpd/conf.modules.d/00-mpm.conf
# service httpd24-httpd restart
Stopping httpd: [  OK  ]
Starting httpd: [  OK  ]
# ab -c 100 -n 50000 http://127.0.0.1/
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 127.0.0.1 (be patient)
Completed 5000 requests
Completed 10000 requests
Completed 15000 requests
Completed 20000 requests
Completed 25000 requests
Completed 30000 requests
apr_socket_recv: Connection reset by peer (104)
Total of 31218 requests completed
# tail -5 /var/log/httpd24/error_log 
[Fri Apr 24 09:54:30.340402 2015] [autoindex:error] [pid 21366:tid 140616289744640] [client 127.0.0.1:40363] AH01276: Cannot serve directory /opt/rh/httpd24/root/var/www/html/: No matching DirectoryIndex (index.html) found, and server-generated directory index forbidden by Options directive
[Fri Apr 24 09:54:30.340429 2015] [autoindex:error] [pid 21367:tid 140616174356224] [client 127.0.0.1:40364] AH01276: Cannot serve directory /opt/rh/httpd24/root/var/www/html/: No matching DirectoryIndex (index.html) found, and server-generated directory index forbidden by Options directive
[Fri Apr 24 09:54:30.340726 2015] [autoindex:error] [pid 21455:tid 140616090437376] [client 127.0.0.1:40365] AH01276: Cannot serve directory /opt/rh/httpd24/root/var/www/html/: No matching DirectoryIndex (index.html) found, and server-generated directory index forbidden by Options directive
[Fri Apr 24 09:55:10.339283 2015] [autoindex:error] [pid 21366:tid 140616268764928] [client 127.0.0.1:40387] AH01276: Cannot serve directory /opt/rh/httpd24/root/var/www/html/: No matching DirectoryIndex (index.html) found, and server-generated directory index forbidden by Options directive
[Fri Apr 24 09:54:30.764111 2015] [core:notice] [pid 21363:tid 140616681404384] AH00052: child pid 21368 exit signal Segmentation fault (11)

Version-Release number of selected component (if applicable):
rh-perl520-mod_perl-2.0.8-8.20150122svn1653807.el6.x86_64
httpd24-httpd-2.4.12-3.el6.x86_64

Comment 2 Jan Kaluža 2015-04-24 14:42:26 UTC
I'm not able to reproduce this bug so far. Can you get coredump from the crash? Set CoreDumpDirectory to some directory writable by apache:apache and reproduce the bug.

http://httpd.apache.org/docs/current/mod/mpm_common.html#coredumpdirectory

Comment 4 Jan Kaluža 2015-04-27 07:49:07 UTC
Created attachment 1019262 [details]
valgrind output

Comment 5 Jan Kaluža 2015-04-28 06:54:02 UTC
Fix committed upstream:

http://svn.apache.org/viewvc?view=revision&revision=1676417

Comment 10 errata-xmlrpc 2016-11-15 10:05:00 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHEA-2016-2729.html


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