A lot of process using nagios distributed monitor

[Morris, Patrick]

> -----Original Message-----
> From: nagios-users-bounces at lists.sourceforge.net 
> [mailto:nagios-users-bounces at lists.sourceforge.net] On Behalf 
> Of Tiago Cruz
> Sent: Monday, July 17, 2006 5:52 AM
> To: nagios-users at lists.sourceforge.net
> Subject: [Nagios-users] A lot of process using nagios 
> distributed monitor
> 
> I'm using 03 server running nagios 2.4, with distributed arch:
> 
> All the clients have nrpe running. Well, anyway... my problem 
> is with the Display Server (that was running apache and 
> nsca): The "nagios"
> process start with 1 and after 2 or 3 hours we have a lot "nagios"
> process, some like 600 and still increasing until finish the 
> Swap and crash the machine :-/

I get this on a couple Nagios installations -- something will happen
with Nagios (usually on config reloads or restarts) that will cause the
Nagios pipe to stop accepting external commands.  This willl cause
anything trying to use it (in my case, the problem is usually nsca) to
hang.  If you get enough of these external processes hung, the box dies.

I've put in several safeguards against it, including limiting the number
of nsca processes xinetd will allow to run, a check through cron that
submits an external check result every minute (with a corresponding
freshness check in Nagios and an event handler that will restart Nagios
if the check doesn't come in), and a script that will 'kill -9' anything
owned by Nagios if a certain number of processes is running.

I've seen this problem over several years of running Nagios, on Solaris,
Debian, Gentoo and Red Hat.  Don't know if it's the same one you're
seeing, but I've never found a better fix for it.


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