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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