Nagios Support Forum

Dear:

I have this problem, this error appears on the monitoring screen:

xxx.xxx.xxx.151
Current Users
Unknown 5d 17h 39m 1s 5/5 2018-08-14 08:51:09 CHECK_NRPE: Receive header underflow - only 0 bytes received (4 expected).

But if I execute this command from Core Config Manager I get this result:

Run Check Command
Host Address xxx.xxx.xxx.151

[nagios@xxxx ~]$ /usr/local/nagios/libexec/check_nrpe -H xxx.xxx.xxx.151 -t 30 -c check_users
USERS OK - 0 users currently logged in |users=0;10;15;0


What's going on here?

Did you try to apply configuration? Is this a new service or an existing one that just started having issues?

Take a look at the service in your /usr/local/nagios/var/objects.cache, does it show the same command?

Please PM me a copy of your profile. You can get get it from Admin > System Profile > Download Profile.

Thank you!