Re: [mp2] Repeated kill -HUP to httpd dumps core

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Hi,
      But I have tried to reproduce the problem using USR1 and it also
dumped core. I have tried to reproduce the error on Apache 2.0.43 and
the error_log gave a different message. It gave the following message.

  [Thu Nov 18 00:00:01 2004] [notice] configured -- resuming normal operations
   [Fri Nov 19 00:00:05 2004] [warn] child process 12783 still did not
   exit, sending a SIGTERM
   [Fri Nov 19 00:00:05 2004] [notice] SIGHUP received.	Attempting to
   restart
   panic: pthread_key_create	    <<<<<<here is the message
   [Fri Nov 19 00:12:33 2004] [notice]    configured -- resuming
normal operations

I did a strings on mod_perl and found the panic: pthread_key_create
message.  Where can I find this message being generated so that I can
work on it. I also wanted to know if the errors on 2.0.43 and that of
2.0.52 are related.

I did this
# strings mod_perl.so | grep "panic: pthread_key_create"
panic: pthread_key_create
# strings /opt/perl/bin/perl | grep "panic: pthread_key_create"
panic: pthread_key_create


This suggests that the perl interpreter is generating this message.
Where do I proceed from here.

Thanks and Regards,
Pradeep



On Thu, 02 Dec 2004 17:15:51 -0500, Stas Bekman <stas@xxxxxx.xxx> wrote:
> Stas Bekman wrote:
> 
> 
> > [please don't forget to Reply-All when following up on list's discussion!
> > Thanks]
> >
> > pradeep kumar wrote:
> >
> >> Hi,                         By sending a "httpd -k graceful" multiple
> >> times does not
> >> reproduce the problem. But kill -HUP definetly produces it. On Apache
> >> 2.0.52 it dumps core with seg fault. On runnig the same on Apache
> >> 2.0.43 it does not produce a core but gives a
> >> "panic:pthread_key_create" error in the error_log.
> >
> >
> > Excellent. Why can't you use "httpd -k graceful" then?
> >
> >>    [Thu Nov 18 00:00:01 2004] [notice]    configured -- resuming
> >> normal operations
> >>    [Fri Nov 19 00:00:05 2004] [warn] child process 12783 still did not
> >>    exit, sending a SIGTERM
> >>    [Fri Nov 19 00:00:05 2004] [notice] SIGHUP received.    Attempting to
> >>    restart
> >>    panic: pthread_key_create        <<<<<<here is the message
> >>    [Fri Nov 19 00:12:33 2004] [notice]   configured -- resuming normal
> >> operations
> >>
> >>
> >> Are these two problems related. The problem occurs only when the
> >> mod_perl module is loaded. It is not reproduced when it now loaded.
> >
> >
> > I think it just happens to trigger the problem. Looking at the source
> > looks like both approaches should work. Let me ping the httpd-dev list to
> > see if SIGHUP can be used.
> 
> So here is the answer from httpd-dev (courtesy of Jeff Trawick):
> 
>   graceful uses signal USR1; ungraceful restart uses HUP;
> 
> so you want to use "kill -USR1" or "httpd -k graceful"
> 
> ungraceful is doomed not to work (even normal shutdown) due to problems in
> the MPM implementation:
> http://issues.apache.org/bugzilla/show_bug.cgi?id=23238
> 
> 
> 
> --
> __________________________________________________________________
> Stas Bekman            JAm_pH ------> Just Another mod_perl Hacker
> http://stason.org/     mod_perl Guide ---> http://perl.apache.org
> mailto:stas@xxxxxx.xxx http://use.perl.org http://apacheweek.com
> http://modperlbook.org http://apache.org   http://ticketmaster.com
>

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