NSCA --daemon problem: too many child process

[M V Ajay (vMoksha)]

Dear All:

I have a Nagios distributed setup (Central: Solaris 9, sparc , 1 GB RAM,
Nagios 2.4, nsca 2.6/Distributed: Solaris 10, sparc , 1 GB RAM, Nagios 2.4,
nsca 2.6) monitoring more than 600 servers and 2000+ services. I am running
nsca in daemon mode and have noticed that it spawned child processes around
2800+ and my system swap usage was full. None of the service checks was
happening there on.

I could see lot of WARNING messages in nagios.log like,

[1154408570] Warning: The results of service 'disk_d' on host 'server001'
are stale by 21 seconds (threshold=862 seconds).  I'm forcing an immediate
check of the service.

Also I could see lot of messages in /var/adm/messages like this,

Aug  2 00:28:02 nagiosserver genunix: [ID 470503 kern.warning] WARNING:
Sorry, no swap space to grow stack for pid 13531 (sshd)

I had to login thorugh system console and kill nsca and restart for
rectifying this problem.

Any idea what would have caused this problem?

Thanks and Regards,
Ajay


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