27 Jul
Finally, getting Apache to core
I’ve had some problems with Apache and I’d like a core dump when it happens so I can get a backtrace.
It’s harder than you think. Red Hat has 2 documents on it: this and that.
The summary of those is to add
CoreDumpDirectory /var/apache-dump
to httpd.conf, and make that directory 777. Then, edit some startup scripts to run ulimit -n unlimited.
What I had to do to get it working was:
/etc/sysctl.conf:
kernel.suid_dumpable = 1
kernel.core_pattern = /var/apache-dump/%e-%t-%p
to get it to work.
As an aside, the ulimit -c unlimited hacks seems unnecessary, you can add
DAEMON_COREFILE_LIMIT=999999999
(or possibly even “unlimited” ) to /etc/sysconfig/httpd, as part of /etc/init.d/functions checks that (that goes for any service, too)
I tried this and it didn’t work but eventually realized that I also needed to configure SELinux so that /var/apache-dump was writable by apache … just throwing that out that to save someone else time to runs into this post.
September 25th, 2007 at 2:33 am