Intermittent 'unknown' test results on specific host

doofologist · Post by **doofologist** » Mon Nov 09, 2009 1:28 pm

We recently swapped out a box previously running Vista, with a box running the same apps but on XP SP2 (with more memory). I've instituted the same monitors, however now there are a few tests that randomly seem to not be able to connect. Specifically, I've got two 'process' monitors that randomly report 'Unknown'. The 'Available MBytes' test is almost 100% unknown, and the 'NTlog' monitor is intermittently reporting ' Code: 1726 The remote procedure call failed'. 'CPU usage' usually comes through, and 'UNC free space' is quite reliable.

The local switch is reliable (other hosts in the same zone have no issues), there are definitely no firewall issues, and the remote registry and RPC service are both running (restarted them several times to be sure).

I'm running v 8.15, and none of our other identically monitored systems are having these kinds of issues. The only special issue with this box is it is ridiculously busy on inbound traffic, always has been. My theory is that it isn't prioritizing HostMon requests, and they are timing out; but that's just a theory. Perhaps Vista was better at handling these requests. Any advice ?

KS-Soft · Post by **KS-Soft** » Mon Nov 09, 2009 3:18 pm

Yes, may be its timeout issue. E.g. there are different default RPC timeouts used by Windows 2000 and Windows 2003. Probably Windows XP and Windows Vista use different RPC timeouts as well.
I think there should be some registry parameter but I cannot find any mention about it

Will try to find..

BTW: Have you tried to install Service Pack 3?

Regards
Alex

doofologist · Post by **doofologist** » Mon Nov 09, 2009 3:51 pm

Sorry, old habit, it is SP3. That RPC timeout seems like a good lead, I'm praying to the Google gods for a registry key to hunt down, no luck so far. Let me know if you track it down.

Thanks !

KS-Soft · Post by **KS-Soft** » Tue Nov 10, 2009 2:29 pm

Sorry, we spent a lot of time but cannot find anything useful.
There is registry setting for RPC timeout for Active Directory replication but I don't think it has any sense in this case...
BTW: We recommend to start HostMonitor on Windows 2003 SP 2. Can you use such system?

Regards
Alex

doofologist · Post by **doofologist** » Tue Nov 10, 2009 3:11 pm

Hostmon is hosted on a Windows2003 SP2 x64 box; it's monitoring over 100 other systems with similar configurations (Vista/XP) with largely no issues like this.

KS-Soft · Post by **KS-Soft** » Tue Nov 10, 2009 4:46 pm

I though you moved HostMonitor from Vista to XP system.
Am I wrong? Did you keep HostMonitor on the same Windows 2003 system while moved some monitored (target) system from Windows Vista to Windows XP? So HostMonitor (Windows 2003) check Windows XP?

Regards
Alex