Nagios Support Forum

UPDATE:

This is happening on ALL instances of Windows installations of the NSClient++.

This error is repeating itself over and over, causing the log file on a particular machine to grow out of control.

I've tried searching only to find that I need to upgrade the NSclient to solve the issue, however after a re-install, it still fills up the log file.

Any ideas what could be causing this?

2011-06-21 14:55:57: error:modules\CheckSystem\PDHCollector.cpp:215: Failed to query performance counters: \Processor(_total)\% Processor Time: PdhGetFormattedCounterValue failed: A counter with a negative denominator value was detected. (800007D6)

Server: Windows 2003 Enterprise Edition 32 bit
NSClient++ version: NSClient++ - 0.3.8.75

Can you show us the check command and service definition for that particular service?

Check command:

$USER1$/check_nt -H $HOSTADDRESS$ -p 12489 -v CPULOAD -l 5,90,95,10

Service Definition:

I'm not sure where to find this as this was imported from a Nagios 2.9 core installation. I can't find the service definition anywhere.

Could this be as simple as replacing the legacy Nagios 2.9 checks with NagiosXI checks?

One more thing to note - I'm seeing this error on Windows machines where we're not even checking CPU. It's also happening multiple times per second.

For instance, on a particular server, we are only checking the disk usage, and I still see this in the NSClient log from today:

2011-06-21 09:50:00: error:modules\CheckSystem\PDHCollector.cpp:215: Failed to query performance counters: \Processor(_total)\% Processor Time: PdhGetFormattedCounterValue failed: A counter with a negative denominator value was detected. (800007D6)

Is this something that just recently started at the same time for all windows servers, or is it something that's been ongoing for quite some time?

It looks like it has been going on since we purchased and installed NagiosXI - Nagios sent us a notification that a C drive had filled up, and I used a utility to find the largest files on the drive, the NSCLient.log being one of them - around 4gb in size.

Yesterday, I just checked our other Windows servers and this is also the case with the log files.

I've also noticed that even if I replace the legacy check with a new CPU load check using the Nagios Wizard, the errors still appear and are being logged.

2011-06-21 09:50:00: error:modules\CheckSystem\PDHCollector.cpp:215:

This is error output from one of the NSClient++ modules, have you come across any other information on this from http://nsclient.org/nscp/

Dug around a bit, apparently it's a bug.

I've commented out filelogger.dll to stop the logging completely until the problem gets patched. Thanks for your help either way.