fork errors

[Terry]

Hello,

I have been having this issue for quite some time.  For some unknown
reason, nagios stops performing checks with these errors:

[1125536952] Warning: The check of service 'PING' on host 'hostname'
could not be performed due to a fork() error.  The check will be
rescheduled.

All checks fail like this until nagios is restarted.  When this
problem is occuring I can run the service checks manually both as the
nagios user and as the root user.  There are no resource problems that
I can see at the time.  We do not appear to be hitting a limit with
open files or anything like that either.  The nagios mirrors the root
user in that area.

What could be wrong?

Thanks!


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