Nagios Support Forum

Hi,

One of the service checks "load" is in critical state and showing error "NRPE: unable to read output"

When we execute the following command from Nagios server it is giving error "NRPE: unable to read output"

/usr/local/nagios/libexec/check_nrpe -H host1 -n -c check_load -a 60,55,50 80,75,70
NRPE: Unable to read output

When we execute the the command on the remote server using nagios user we are getting expected result.

/opt/iexpress/nagios/libexec/check_load -w 60,55,50 -c 80,75,70
OK -- load average 0.05,0.002,0.003|

We don't see any permission issue of /opt/iexpress/nagios/libexec/check_load

What could be the problem.

Pratap

Hi @Pratapa, thanks for reaching out.

I would go on host1 and check the NRPE daemon's log. If NRPE isn't returning output, you should see an error message indicating what's wrong with the incoming request.

Let me know if that helps or if you have any further questions or concerns.

-Sebastian Wolf

Remote server is a HP-UX server and I did not find log file under /var/log directory.

I found a log file nagios.log under the directory /opt/iexpress/nagios/var but that is not getting updated.
Last update Oct 17 2014.

The OP probably wants to check with nmap -Pn to see if nrpe is listening, and search the internet for the error message, which will lead to the TS document from nagios.

I'm having the same problem. Did you find a fix?

So check_load fails as what user? Provide the command and output. you should have a new thred for this.