External Command hang segfault

[Andreas Ericsson]

David Schlecht wrote:
> Hi list
> 
> I'm slowly making progress on this one, but stuck again.
> 
> The problem: cmd.cgi sometimes hangs and Nagios segfaults after Schedule Downtime External Command. It dies in every version on every Linux on every processor.
> 
> I did a stack trace on the hung cmd.cgi and found that it was hanging on the write to nagios.cmd. This pointed to the missing nagios process that was supposed to be at the other end of the named pipe. It had died.
> 
> This used to generate a segfault in the logs but no longer does. It just dies quietly.
> 
> How do I proceed from here? How do I find out why Nagios died? Since there's no segfault, there's no core file.
> 

You can enable core-dumps in nagios by
a) Making sure it runs in a directory where the user you've configured 
it to run as has write-access and setting nagios_dumps_core=1 in 
nagios.cfg (I might be wrong on the variable name; The docs will have 
detailed and accurate info though).
b) Running it as a foreground process.

-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231

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