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Posted to bugs@httpd.apache.org by bu...@apache.org on 2010/01/02 11:56:35 UTC
DO NOT REPLY [Bug 48471] New: Apache Restarts Randomly When Using
Worker
https://issues.apache.org/bugzilla/show_bug.cgi?id=48471
Summary: Apache Restarts Randomly When Using Worker
Product: Apache httpd-2
Version: 2.2.14
Platform: PC
OS/Version: Linux
Status: NEW
Severity: major
Priority: P2
Component: worker
AssignedTo: bugs@httpd.apache.org
ReportedBy: theking@getpaidforum.net
>From time to time, Apache keeps restarting (sometimes rarely, sometimes quite
often).
grep -R "Doing graceful restart" /etc/httpd/logs/error_log | awk 'BEGIN
{FS="]"};{print $1}'| cut -d "[" -f 2
Tue Dec 29 16:11:06 2009
Tue Dec 29 16:24:40 2009
Tue Dec 29 16:25:11 2009
Tue Dec 29 16:25:12 2009
Tue Dec 29 16:28:44 2009
Tue Dec 29 16:37:29 2009
Tue Dec 29 16:46:17 2009
Tue Dec 29 16:55:13 2009
I turned on the LogLevel from warn to debug and Apache and uncovered the
following message in the logs:
[Tue Dec 29 04:35:05 2009] [notice] SIGUSR1 received. Doing graceful restart
[Tue Dec 29 04:35:05 2009] [debug] worker.c(791): (22)Invalid argument:
apr_proc_mutex_unlock failed. Attempting to shutdown process gracefully.
Switching to prework solved the issue. Recompiled many times, still same issue.
CentOS 5.4 x64
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DO NOT REPLY [Bug 48471] Apache Restarts Randomly When Using Worker
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=48471
--- Comment #9 from Will Rowe <wr...@apache.org> 2010-01-11 20:47:25 UTC ---
Huh niq?
Nothing in PHP [itself] is a problem - in fact it works very well in any
number of distributions. Combining PHP with extensions that access
non-threadsafe
libraries is - obviously - a problem.
But please leave this fud on PHP's documentation commentary sections, where the
misinformed, blanket commentary belongs.
As noted by rplume, this is not the place for such problem reports.
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DO NOT REPLY [Bug 48471] Apache Restarts Randomly When Using Worker
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=48471
Hay <th...@getpaidforum.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|INVALID |
--- Comment #4 from Hay <th...@getpaidforum.net> 2010-01-02 05:46:26 UTC ---
I am not using mod_php, I am running on suPHP + fCGI
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DO NOT REPLY [Bug 48471] Apache Restarts Randomly When Using Worker
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=48471
Nick Kew <ni...@webthing.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |INVALID
--- Comment #2 from Nick Kew <ni...@webthing.com> 2010-01-02 03:58:06 UTC ---
It's well-known and well-documented, you don't use worker (or other threaded
MPM) with non-thread-safe software.
That's why all the distros give you prefork if you want mod_php.
If you want worker+php, run the php out-of-process, e.g. with CGI or fastcgi.
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DO NOT REPLY [Bug 48471] Apache Restarts Randomly When Using Worker
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=48471
--- Comment #5 from Jeff Trawick <tr...@apache.org> 2010-01-02 05:52:03 UTC ---
> [notice] SIGUSR1 received. Doing graceful restart
Some process is sending the SIGUSR1 signal to the httpd parent process; this
should be a separate httpd process, when invoked via "apachectl graceful" or
"httpd -k graceful".
If it isn't a script or user explicitly triggering graceful restart, I don't
know a straightforward way to capture the sender.
Perhaps a script that watches the log file for that message could capture the
list of active processes? (Hopefully someone has a better idea.)
>debug] worker.c(791): (22)Invalid argument: apr_proc_mutex_unlock failed. Attempting to shutdown process gracefully.
This is an uninteresting error which occurs during graceful restart processing
and can be ignored.
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DO NOT REPLY [Bug 48471] Apache Restarts Randomly When Using Worker
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=48471
--- Comment #6 from Hay <th...@getpaidforum.net> 2010-01-06 00:28:37 UTC ---
Well whatever process is making these graceful restarts, is not using
/etc/init.d/httpd. I see restarts at 1900, but nothing has touched that init
script since I have last. I also checked and a /scripts/restartsrv_httpd
doesn't issue a graceful restart either , just a regular restart.
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DO NOT REPLY [Bug 48471] Apache Restarts Randomly When Using Worker
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=48471
--- Comment #7 from Hay <th...@getpaidforum.net> 2010-01-06 09:35:12 UTC ---
>From the logs, I believe I might have finally found something interesting from
the script:
[root@host] ~ >> grep -R safeaprestart /root/restartWatch-*
/root/restartWatch-01:16::01-06-2010:root 24474 0.0 0.1 28456 4040 ? SN 01:16
0:00 safeaprestart - doing restart /root/restartWatch-09:30::01-06-2010:root
10721 2.5 0.1 28456 4044 ? RN 09:30 0:00 safeaprestart - doing restart
/root/restartWatch-09:47::01-06-2010:root 25993 1.0 0.1 28452 4040 ? SN 09:47
0:00 safeaprestart - doing restart /root/restartWatch-10:05::01-06-2010:root
21235 0.0 0.1 28452 4040 ? SN 10:05 0:00 safeaprestart - doing restart
/root/restartWatch-12:05::01-06-2010:root 1042 0.0 0.1 28456 4036 ? SN 12:05
0:00 safeaprestart - doing restart
As you can see, when these restarts happen, there is a mysterious
"safeaprestart" process running. A little research seems to indicate that is a
component of tailwatchd. Also a little research reveals that everytime you add
a account, Apache is restarted with that process as well:
$output .= Whostmgr::UI::setstatus("Restarting apache");
Cpanel::HttpUtils::safeaprestart();
$output .= Whostmgr::UI::setstatusdone();
For now I have disabled monitoring of Apache from tailwatchd. Now if the issue
was purely tailwatchd restarting Apache even though it didn't need to be, this
won't cause any downtime. On the other hand if Apache is really failing due to
some other issue (and it doesn't appear to be) it will continue to fail, but
won't be automatically restarted by tailwatchd.
As of now, tailwatchd monitoring of Apache is disabled. So if the restarts
cease to happen now, we will know tailwatchd was the culprit.
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DO NOT REPLY [Bug 48471] Apache Restarts Randomly When Using Worker
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=48471
Ruediger Pluem <rp...@apache.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution| |INVALID
--- Comment #8 from Ruediger Pluem <rp...@apache.org> 2010-01-06 10:44:41 CET ---
3rd party issue, non httpd related.
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DO NOT REPLY [Bug 48471] Apache Restarts Randomly When Using Worker
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=48471
--- Comment #3 from Hay <th...@getpaidforum.net> 2010-01-02 04:08:52 UTC ---
I am running suPHP + fCGI
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DO NOT REPLY [Bug 48471] Apache Restarts Randomly When Using Worker
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=48471
--- Comment #1 from Hay <th...@getpaidforum.net> 2010-01-02 03:01:01 UTC ---
PHP 5.2.12
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