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Posted to bugs@httpd.apache.org by bu...@apache.org on 2013/01/31 21:24:51 UTC
[Bug 54512] New: Apache hung
https://issues.apache.org/bugzilla/show_bug.cgi?id=54512
Bug ID: 54512
Summary: Apache hung
Product: Apache httpd-2
Version: 2.2.6
Hardware: Other
OS: AIX
Status: NEW
Severity: critical
Priority: P2
Component: All
Assignee: bugs@httpd.apache.org
Reporter: giri_marni@dellteam.com
Classification: Unclassified
Version:Apache/2.2.6 (Unix)
OS: AIX
We have an intermittent, but frequent, problem where Apache in production hangs
and requires us to restart it. This is on AIX. There are 2 apache instances
on each server and the each instance has its own IP. The problem occurs on only
one of the instances at one time and the other instance works normally during
the issue. Httpd threads reach to maximum( 256) and apache hang up and does not
take any requests. The process port does not respond to the telnet on the
server when it hung up. Most of the threads are 1 -2 mins old by the time web
server hung up totally. We have taken thread dump when apache hump up. Please
let me know if you need any config files and logs.
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[Bug 54512] Apache hung
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=54512
--- Comment #4 from Ruediger Pluem <rp...@apache.org> ---
Sorry, but the output is useless. You need an apache compiled with debugging
symbols available (CFLAGS="-O2 -g" on gcc, don't know it for AIX compilers).
In addition you should run the gdb command: thread apply all bt full
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[Bug 54512] Apache hung
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=54512
Eric Covener <co...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |NEEDINFO
--- Comment #6 from Eric Covener <co...@gmail.com> ---
Need useful backtraces to proceed
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[Bug 54512] Apache hung
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=54512
--- Comment #1 from Jeff Trawick <tr...@apache.org> ---
The thread dumps of the httpd processes at the time of the hang should be
looked at first.
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[Bug 54512] Apache hung
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=54512
DellTeam <gi...@dellteam.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |giri_marni@dellteam.com
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[Bug 54512] Apache hung
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=54512
--- Comment #5 from DellTeam <gi...@dellteam.com> ---
We used the gdb on a core dump we have taken for the httpd process, can you
please check the info stack output?
-------------------------------
$ gdb /usr/IBMAHS/bin/httpd /home/wsadmin/inc_10130484/apache_core_4a_20130118
GNU gdb (GDB) 7.3
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=powerpc-ibm-aix6.1.2.0
--target=powerpc64-ibm-aix6.1.2.0".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/IBMAHS/bin/httpd...done.
warning: core file may not match specified executable file.
#0 0xd024ca4c in ?? ()
(gdb) info stack
#0 0xd024ca4c in ?? ()
#1 0xffffffff in ?? ()
#2 0xd22e0378 in ?? ()
#3 0xd22e043c in ?? ()
#4 0x1002958c in ap_wait_or_timeout () at mpm_common.c:410
#5 0x100262b8 in ap_mpm_run () at prefork.c:1007
#6 0x10001840 in main () at main.c:730
(gdb) q
-------------------------------
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[Bug 54512] Apache hung
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=54512
--- Comment #2 from DellTeam <gi...@dellteam.com> ---
Thanks Jeff. I am not able to upload the dump here as the compressed file size
is 1.3mb.
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[Bug 54512] Apache hung
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=54512
epcan <cm...@epcan.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|2.2.6 |2.2.16
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[Bug 54512] Apache hung
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=54512
--- Comment #3 from DellTeam <gi...@dellteam.com> ---
Created attachment 29915
--> https://issues.apache.org/bugzilla/attachment.cgi?id=29915&action=edit
gdb output
The issue happened again today. We ran gdb for the process and I attached the
output here. Can you please take a look? AIX trace for the process was also
taken. The issue is impacting Hilton worldwide production web site.
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