Help needed tracking down 'Callback called exit' problem

[Paul Dlug]

I have a problem I can't seem to track down, showing up in our logs is:
Out of memory!
Callback called exit.

Typically there are two or three of these right after one another.
Depending on server load they show up every 15min. to an hour.

I followed the guidelines for allocating an emergency memory pool in the
guide and using Apache::Debug but I wasn't able to get any information
out of it. The biggest problem is that I cannot seem to reproduce the
error. I parsed the URL's out of the access log and ran all of the
requests against our staging server, the error never appeared.

Webservers are behind a load balancer, running Apache 1.3.23/mod_proxy
proxying requests to mod_perl (Apache 1.3.23/mod_perl 1.26) server
running on the localhost.

This is all running on FreeBSD 4.5-STABLE. There's plenty of free
memory, I also turned on process accounting and never saw a mod_perl
httpd grow above 31mb. The load average on the boxes never gets above
0.05.

Is there anyway to have the parent apache process log all
creations/exits of the children? This way I could setup an access log
with the PID of each child and then trace back all requests served after
it's death.

Any help greatly appreciated.

Re: Help needed tracking down 'Callback called exit' problem

[Geoffrey Young]

 Is there anyway to have the parent apache process log all
 creations/exits of the children? This way I could setup an access log
 with the PID of each child and then trace back all requests served after
 it's death.


recipe 17.5 in the cookbook describes how to do this.  basically you can hook into the 
PerlChildInitHandler and PerlChildExitHandler phases with some sort of marking 
mechanism 
similar to the code here

http://www.modperlcookbook.org/code/ch17/Cookbook/LogChildren.pm

HTH

--Geoff

Re: Help needed tracking down 'Callback called exit' problem

[Per Einar Ellefsen]

At 18:10 29.04.2002, Paul Dlug wrote:
I have a problem I can't seem to track down, showing up in our logs is:
Out of memory!
Callback called exit.

I don't know if it'll be of any help, but you might want to look in the 
guide: 
http://perl.apache.org/preview/modperl-docs/dst_html/docs/1.0/guide/troubleshooting.html#Callback_called_exit


-- 
Per Einar Ellefsen
[EMAIL PROTECTED]