Segmentation fault!

Hi All,
I have installed RT2.0, I am testing
the installation, it seems to be everything
working ok, but when I check the http log it
is giving the following error message.

Is it from Apache Perl modules or from rt, is

anybody knows(experienced) why this errors??

Any help to solve this problem is greatly
appreciated,
-bala-

[Sun Mar 10 20:13:15 2002] [notice] Apache/1.3.19
(Unix) (Red-Hat/Linux) mod_ssl/2.8.1 OpenSSL/0.9.6
DAV/1.0.2 PHP/4.0.4pl1 mod_perl/1.24_01 configured –
resuming normal operations
[Sun Mar 10 20:13:15 2002] [notice] suEXEC mechanism
enabled (wrapper: /usr/sbin/suexec)
[Sun Mar 10 20:14:10 2002] [notice] child pid 7079
exit signal Segmentation fault (11)
[Sun Mar 10 20:14:38 2002] [notice] child pid 7080
exit signal Segmentation fault (11)
[Sun Mar 10 20:26:24 2002] [notice] child pid 7083
exit signal Segmentation fault (11)
[Sun Mar 10 20:28:30 2002] [notice] child pid 7081
exit signal Segmentation fault (11)
[Sun Mar 10 20:31:34 2002] [notice] child pid 7076
exit signal Segmentation fault (11)

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Is it from Apache Perl modules or from rt, is

anybody knows(experienced) why this errors??

Asking Google for ‘segmentation fault 11 apache’ brings up many pages,
most seeming to indicate that it is a mismatch between perl, mod_perl and
apache. If you’ve upgraded perl between when you installed mod_perl and
now, this may also be the problem (usually I get other errors, but not
segmentation fault).

                         Bruce Campbell                            RIPE
               Systems/Network Engineer                             NCC
             www.ripe.net - PGP562C8B1B                      Operations

I get logs full of SEGV’s also. The restart of apache gives a list of the
modules and their versions. This is on a RH72 box.

I did notice that I didn’t get any SEGVs over the weekend, which is when
the system was not used. But monday thru friday they pile up.

The http access logs look fine. The http error logs are empty. There is
nothing of note in the system messages file. Perhaps there is some
incompatibility in the Apache/perl_mod config like Bruce mentioned. That’s
where I am going to look next. Any other suggestions are welcome.

One thing to note… it does not seem to effect the performance or
usability of RT…

  • Chris

from rt2-error_log:

[Fri Mar 8 04:02:10 2002] [notice] Apache/1.3.20 (Unix) (Red-Hat/Linux)
mod_ssl/2.8.4 OpenSSL/0.9.6b DAV/1.0.2 PHP/4.0.6 mod_perl/1.24_01
configured – resuming normal operations
[Fri Mar 8 04:02:10 2002] [notice] suEXEC mechanism enabled (wrapper:
/usr/sbin/suexec)
[Fri Mar 8 09:08:57 2002] [notice] child pid 1844 exit signal
Segmentation fault (11)
[Fri Mar 8 09:16:36 2002] [notice] child pid 1843 exit signal
Segmentation fault (11)
[Fri Mar 8 09:18:40 2002] [notice] child pid 1841 exit signal
Segmentation fault (11)
[Fri Mar 8 09:20:43 2002] [notice] child pid 1838 exit signal
Segmentation fault (11)

Bruce Campbell bruce_campbell@ripe.net
Sent by: rt-users-admin@lists.fsck.com
03/11/2002 04:24 AMTo: Bala linuxbala@yahoo.com
cc: rt-users@lists.fsck.com
Subject: Re: [rt-users] Segmentation fault!!

Is it from Apache Perl modules or from rt, is

anybody knows(experienced) why this errors??

Asking Google for ‘segmentation fault 11 apache’ brings up many pages,
most seeming to indicate that it is a mismatch between perl, mod_perl and
apache. If you’ve upgraded perl between when you installed mod_perl and
now, this may also be the problem (usually I get other errors, but not
segmentation fault).

                         Bruce Campbell RIPE
               Systems/Network Engineer NCC
             www.ripe.net - PGP562C8B1B Operations

rt-users mailing list
rt-users@lists.fsck.com
http://lists.fsck.com/mailman/listinfo/rt-users

I would attribute this to the problems with perl 5.6.0 and mod_perl.
…assuming of course that you haven’t already updated to perl 5.6.1. Mine
does this frequently too - sometimes you do something in RT and there’s no
response because that apache child process died (segfaulted), and you hit
the back button and do it again and it works. I’m not sure whether this
will impact RT in terms of data integrity, but it didn’t seem to be causing
problems so I just set a netsaint check to alert when the number of apache
processes dropped below 1.

Apparently enough people opened tickets in redhat’s bugzilla that they
finally released (just last week) an updated set of perl rpms for 7.2
bringing it to perl 5.6.1. Haven’t got that installed yet, but it will be
later today.

HTH,
TreverFrom: clarsson@manu.com [mailto:clarsson@manu.com]
Sent: Monday, March 11, 2002 9:38 AM
To: rt-users@lists.fsck.com
Subject: Re: [rt-users] Segmentation fault!!

I get logs full of SEGV’s also. The restart of apache gives a list of the
modules and their versions. This is on a RH72 box.

I did notice that I didn’t get any SEGVs over the weekend, which is when the
system was not used. But monday thru friday they pile up.

The http access logs look fine. The http error logs are empty. There is
nothing of note in the system messages file. Perhaps there is some
incompatibility in the Apache/perl_mod config like Bruce mentioned. That’s
where I am going to look next. Any other suggestions are welcome.

One thing to note… it does not seem to effect the performance or
usability of RT…

  • Chris

from rt2-error_log:

[Fri Mar 8 04:02:10 2002] [notice] Apache/1.3.20 (Unix) (Red-Hat/Linux)
mod_ssl/2.8.4 OpenSSL/0.9.6b DAV/1.0.2 PHP/4.0.6 mod_perl/1.24_01 configured
– resuming normal operations
[Fri Mar 8 04:02:10 2002] [notice] suEXEC mechanism enabled (wrapper:
/usr/sbin/suexec)
[Fri Mar 8 09:08:57 2002] [notice] child pid 1844 exit signal Segmentation
fault (11)
[Fri Mar 8 09:16:36 2002] [notice] child pid 1843 exit signal Segmentation
fault (11)
[Fri Mar 8 09:18:40 2002] [notice] child pid 1841 exit signal Segmentation
fault (11)
[Fri Mar 8 09:20:43 2002] [notice] child pid 1838 exit signal Segmentation
fault (11)

Bruce Campbell <bruce_campbell@ripe.net> 

Sent by: rt-users-admin@lists.fsck.com

03/11/2002 04:24 AM

    To:        Bala <linuxbala@yahoo.com> 
    cc:        rt-users@lists.fsck.com 
    Subject:        Re: [rt-users] Segmentation fault!!
Is it from Apache Perl modules or from rt, is

anybody knows(experienced) why this errors??

Asking Google for ‘segmentation fault 11 apache’ brings up many pages,
most seeming to indicate that it is a mismatch between perl, mod_perl and
apache. If you’ve upgraded perl between when you installed mod_perl and
now, this may also be the problem (usually I get other errors, but not
segmentation fault).

                        Bruce Campbell                            RIPE
              Systems/Network Engineer                             NCC
            www.ripe.net - PGP562C8B1B                      Operations

rt-users mailing list
rt-users@lists.fsck.com
http://lists.fsck.com/mailman/listinfo/rt-users