My issue is that when a host is down, nagios check the host every 20s 3 times. I don't understand why 20s. I set it to check every 5 minutes three times. I have already checked my interval_length in the nagios.cfg file and it's set to 60.
Host Down 2016-01-26 16:21:14 HOST ALERT
Host Down 2016-01-26 16:20:58 HOST ALERT
Host Down 2016-01-26 16:20:40 HOST ALERT
With all hosts, I have just done another test with a new host and the result is the same.
As you can see in first attachment it says next check at 17:29:57 but in the second attachment the check is done at 17:25:14, so almost 20s after the first one.
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[1453816564] livestatus: Livestatus 1.2.7i3p5 by Mathias Kettner. Socket: '/usr/local/nagios/var/rw/live'
[1453816564] livestatus: Please visit us at http://mathias-kettner.de/
[1453816564] livestatus: Hint: please try out OMD - the Open Monitoring Distribution
[1453816564] livestatus: Please visit OMD at http://omdistro.org
[1453816564] livestatus: Finished initialization. Further log messages go to /usr/local/nagios/var/livestatus.log
With that in mind, we cannot support other products and how they interact with Nagios. As @hsmith mentioned - make sure your times match up. This could be the problem.