Issues with check_by_ssh

[Hugo van der Kooij]

On Wed, 8 Aug 2007, Matthias Kellermann wrote:

> tonight I got lots of false-positive messages from Nagios. All these
> messages came from services checked with check_by_ssh. Strange thing is
> that SSH was running on all servers and there were no problems with the
> network connectivity. All other services on these servers had no errors.
> After 20 minutes or so check_by_ssh worked fine again.
>
> I've got no errors in the logs (i.e. auth.log) - whether on the Nagios
> server nor on the servers to be monitored. The only error I got from
> check_by_ssh is:
>
> Plugin timed out while executing system call

Check for DNS issues. You may have had an issue with reverse DNS entries 
resulting in the extra delay on each ssh connection. It is an educated 
guess but it would explain the behaviour.

Hugo.

-- 
 	hvdkooij at vanderkooij.org	http://hugo.vanderkooij.org/
 	    This message is using 100% recycled electrons.

 	Some men see computers as they are and say "Windows"
 	I use computers with Linux and say "Why Windows?"
 		(Thanks JFK, for the insight.)

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