At 10:33 AM +0400 9/20/01, Andrei A. Voropaev wrote:
>The funny part is that in our case we also get Segmentation fault from time to
>time but there's no coredump file. I even tried to attach gdb to apache child
>and wait for Segfault. I got it but I'm not sure I could understand it. Please
>see below for examples.
>
>The only thing I can say here that after we drastically reduced usage of
>module Carp.pm the Segmentation faults almost disappeared. (I mean it. Before
>the change we had Segfaults 5-6 times every minute. Now we have it once in
>20-30 minutes). Please note that Carp::croak was used by Mason object in
>method 'abort' so we had to stop using it.
I had this very same problem on a system I setup last november for
the 2000 elections. We had three servers, all running linux, apache,
and mod_perl (probably all different versions), and this was the only
box that core dumped.
I later discovered that there was a bug in Carp under perl 5.6.0 and
that upgrading would have fixed my problem...
At 10:32 AM -0800 1/31/01, Doug MacEachern wrote:
>On Wed, 31 Jan 2001, Robert Landrum wrote:
>
>> Has anyone else had problems with the Carp module and mod_perl?
>
>there were bugs related to Carp in 5.6.0, fixed in 5.6.1-trial1,2
You can continue to use Mason by putting a line in startup.pl
*Carp::croak = sub { die };
*Carp::carp = sub { warn };
Rob
>Andrei
>
>--------------------------------------------------------------
>Program received signal SIGSEGV, Segmentation fault.
>0x406041ec in Perl_sv_setsv () from /etc/httpd/modules/libperl.so
>(gdb) bt
>#0 0x406041ec in Perl_sv_setsv () from /etc/httpd/modules/libperl.so
>#1 0x405fa329 in Perl_pp_sassign () from /etc/httpd/modules/libperl.so
>#2 0x405f9f0a in Perl_runops_standard () from /etc/httpd/modules/libperl.so
>#3 0x405ba456 in S_call_body () from /etc/httpd/modules/libperl.so
>#4 0x405ba028 in perl_call_sv () from /etc/httpd/modules/libperl.so
>#5 0x405ef71f in Perl_vdie () from /etc/httpd/modules/libperl.so
>#6 0x405ef859 in Perl_die () from /etc/httpd/modules/libperl.so
>#7 0x406231f6 in Perl_pp_die () from /etc/httpd/modules/libperl.so
>#8 0x405f9f0a in Perl_runops_standard () from /etc/httpd/modules/libperl.so
>#9 0x405ba456 in S_call_body () from /etc/httpd/modules/libperl.so
>#10 0x405ba231 in perl_call_sv () from /etc/httpd/modules/libperl.so
>#11 0x4059c225 in perl_call_handler () from /etc/httpd/modules/libperl.so
>#12 0x4059ba6b in perl_run_stacked_handlers () from
>/etc/httpd/modules/libperl.so
>#13 0x4059a1c8 in perl_handler () from /etc/httpd/modules/libperl.so
>#14 0x08054ead in ap_invoke_handler () at eval.c:41
>#15 0x0806704c in ap_some_auth_required () at eval.c:41
>#16 0x080670c3 in ap_process_request () at eval.c:41
>#17 0x0805f6d7 in ap_child_terminate () at eval.c:41
>#18 0x0805f919 in ap_child_terminate () at eval.c:41
>#19 0x0805fc6b in ap_child_terminate () at eval.c:41
>#20 0x080601ac in ap_child_terminate () at eval.c:41
>#21 0x080608a3 in main () at eval.c:41
>#22 0x40141177 in __libc_start_main (main=0x8060420 <main>, argc=3,
>ubp_av=0xbffffb3c,
> init=0x804fa50 <_init>, fini=0x808a570 <_fini>, rtld_fini=0x4000e184
> <_dl_fini>,
> stack_end=0xbffffb2c) at ../sysdeps/generic/libc-start.c:129
>
>(gdb) info frame
> Stack level 0, frame at 0xbffff418:
> eip = 0x406041ec in Perl_sv_setsv; saved eip 0x405fa329
> called by frame at 0xbffff448
> Arglist at 0xbffff418, args:
> Locals at 0xbffff418, Previous frame's sp is 0x0
> Saved registers:
> ebx at 0xbffff40c, ebp at 0xbffff418, esi at 0xbffff410, edi at 0xbffff414,
> eip at 0xbffff41c
>-----------------------------------------------------------------------------
>
>(gdb) bt
>#0 0x406059be in Perl_sv_clear () from /etc/httpd/modules/libperl.so
>#1 0x40605d6f in Perl_sv_free () from /etc/httpd/modules/libperl.so
>#2 0x405f8afd in Perl_av_clear () from /etc/httpd/modules/libperl.so
>#3 0x40618ea9 in Perl_leave_scope () from /etc/httpd/modules/libperl.so
>#4 0x4061758c in Perl_pop_scope () from /etc/httpd/modules/libperl.so
>#5 0x4061c535 in Perl_die_where () from /etc/httpd/modules/libperl.so
>#6 0x405efb5a in Perl_vcroak () from /etc/httpd/modules/libperl.so
>#7 0x405efbf9 in Perl_croak () from /etc/httpd/modules/libperl.so
>#8 0x406039a5 in Perl_sv_setsv () from /etc/httpd/modules/libperl.so
>#9 0x405fbd47 in Perl_pp_aassign () from /etc/httpd/modules/libperl.so
>#10 0x405f9f0a in Perl_runops_standard () from /etc/httpd/modules/libperl.so
>#11 0x405ba456 in S_call_body () from /etc/httpd/modules/libperl.so
>#12 0x405ba028 in perl_call_sv () from /etc/httpd/modules/libperl.so
>#13 0x405ef71f in Perl_vdie () from /etc/httpd/modules/libperl.so
>#14 0x405ef859 in Perl_die () from /etc/httpd/modules/libperl.so
>#15 0x406231f6 in Perl_pp_die () from /etc/httpd/modules/libperl.so
>#16 0x405f9f0a in Perl_runops_standard () from /etc/httpd/modules/libperl.so
>#17 0x405ba456 in S_call_body () from /etc/httpd/modules/libperl.so
>#18 0x405ba231 in perl_call_sv () from /etc/httpd/modules/libperl.so
>#19 0x4059c225 in perl_call_handler () from /etc/httpd/modules/libperl.so
>#20 0x4059ba6b in perl_run_stacked_handlers () from
>/etc/httpd/modules/libperl.so
>#21 0x4059a1c8 in perl_handler () from /etc/httpd/modules/libperl.so
>#22 0x08054ead in ap_invoke_handler () at eval.c:41
>#23 0x0806704c in ap_some_auth_required () at eval.c:41
>#24 0x080670c3 in ap_process_request () at eval.c:41
>#25 0x0805f6d7 in ap_child_terminate () at eval.c:41
>#26 0x0805f919 in ap_child_terminate () at eval.c:41
>#27 0x0805fc6b in ap_child_terminate () at eval.c:41
>#28 0x080601ac in ap_child_terminate () at eval.c:41
>#29 0x080608a3 in main () at eval.c:41
>#30 0x40141177 in __libc_start_main (main=0x8060420 <main>, argc=3,
>ubp_av=0xbffffb3c,
> init=0x804fa50 <_init>, fini=0x808a570 <_fini>,
>rtld_fini=0x4000e184 <_dl_fini>,
> stack_end=0xbffffb2c) at ../sysdeps/generic/libc-start.c:129
>(gdb) info frame
>Stack level 0, frame at 0xbffff288:
> eip = 0x406059be in Perl_sv_clear; saved eip 0x40605d6f
> called by frame at 0xbffff2a8
> Arglist at 0xbffff288, args:
> Locals at 0xbffff288, Previous frame's sp is 0x0
> Saved registers:
> ebx at 0xbffff27c, ebp at 0xbffff288, esi at 0xbffff280, edi at
>0xbffff284, eip at 0xbffff28c
>-----------------------------------------------------------------------
>
>
>On Thu, Sep 20, 2001 at 01:02:43AM +0800, Stas Bekman wrote:
>> [EMAIL PROTECTED] wrote:
>>
>> > Hi All,
>> >
>> > We are rigorously testing our application and trying to refresh the page
>> > continously... I know the customer will be a nerd to do this but still a
>> > possibility.
>> > Interestingly after some repeated attempts we get the following
>>error in our
>> > log file.
>> >
>> > [Wed Sep 19 13:56:02 2001] [notice] child pid 1041 exit signal
>>Segmentation
>> > fault (11)
>> >
>> > Highly appreciated if anyone can throw some light.....
>>
>>
>> You have to send the backtrace. See the SUPPORT file for more details.
>> Make sure to setup your enviroment so it'll dump core on segv. In bash run:
>>
>> % ulimit -c unlimited
>>
>> before starting the server (from the same console).
>>
>> _____________________________________________________________________
>> Stas Bekman JAm_pH -- Just Another mod_perl Hacker
>> http://stason.org/ mod_perl Guide http://perl.apache.org/guide
>> mailto:[EMAIL PROTECTED] http://apachetoday.com http://eXtropia.com/
>> http://singlesheaven.com http://perl.apache.org http://perlmonth.com/
--
"Only two things are infinite: The universe, and human stupidity. And I'm not
sure about the former." --Albert Einstein
