Nagios Support Forum

On one of the windows servers, NSClinet is in OK state but the following status information is showing

NSClient is running. Version is could not fetch information from server

Other services are in warning and unknown state

Memory Physical Unknown CHECK_NRPE: Receive header underflow - only 0 bytes received (4 expected).
NT-CPU Warning could not fetch information from server
NT-DriveC Warning could not fetch information from server

Apart from this no other services are configured on this server.


[root@nagios server libexec]# ./check_nrpe -H 10.215.50.24
CHECK_NRPE: Receive header underflow - only 0 bytes received (4 expected).


What could be the problem.

Could you please help me on this.

I have this same issue with one of my servers as well.
Accidentally deleted the old NS Client++ and now the new version(even when legacy mode is checked) states "____Warning: Could not fetch information from server"(Yellow) with the occasional "____Usage unknown: Could not fetch information from server"(Orange)

NSClient++ has a log fiile located 'C:\Program Files\NSClient++\nsclient.log'

The NSClient log level defaults to "info" if I remember correctly. You can kick this up to debug in the nsclient.ini file and tail the logs (I use NotePad++ for this on windows) to see if you can find what's actually generating the error.

*NOTE*
This will generate a lot of log entries, only leave the settings at debug while you are actually debugging!

That being said you should have a look at NCPA