Error message: We have some HTTPS Active Check that are in OK status into “Services of host” but in the Monitor tab they are in WARN status and in Summary there is (null).
In the nagios.log it’s logged as:
If this happens after a core restart / activation of changes then
it is a known problem with 2.0 and Nagios core and active checks.
See here Checkmk Service (null) Returns On Many Servers
It happens only on active checks like check_http or the CheckMK service.
Hi Andreas, thanks for your answer, but I have installed also the 2.1.0 raw edition version and I have the same behavior.
In the Setup view I have OK in the Status and in the Monitor view I have always a WARN State with (null) in the summary.
In the ~/var/nagios/nagios.log I have this (sorry for the many canceled lines):