Orphan checks warnings in nagios.log; server restart fix

[ivankgb]

We're experiencing the same issue with our Nagios server every night (around 3am).
Nagios.log starts being populated with the following warning messages and no longer runs/processes checks:

The check of host 'prodbc-alc' looks like it was orphaned (results never came back). I'm scheduling an immediate check of the host

The only thing that fixes the issue is a server reboot.

I've already gone through this wiki article to no avail:

http://support.nagios.com/wiki/index.ph ... g_Orphaned

I do see /tmp directory being filled up quickly with check files and also if I run command: nagios -v /etc/nagios.cfg
it complains about not being able to write to /tmp directory.

I suspect there is another instance of Nagios running, but not quite sure how to properly verify this and why it wouldn't get fixed by a server reboot permanently.
Thanks in advance for your help!
ivankgb

[mguthrie]

How is the hard drive space on the partition where /tmp is located? If you run out of free space in that location you would get orphaned checks. Also, if nagios can't actually write to the /tmp directory then you would also get orphaned checks perpetually. What are the file permissions on the tmp directory?