I've been using nagios for several months to monitor many hosts on our network and just last night before midnight it stopped working. I can access Nagios web interface but I can see that none of the service/host checks have updated since just before midnight. I've checked my /var/log/messages which doesn't give me any helpful information. Atleast that I can see. In fact, nothing at all after midnight so I really don't know what happened.
I've stopped the webserver as well as nagios altogether and rebooted the machine. Started the services again without error and nagios seems to be running fine but again, it's not actively monitoring our devices. It just shows old info from last night before midnight. Please advise!!!