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Computer unreachable alert - ServerUpMonitor:COM Error

Intermittently getiting a 'Computer unreachable' alert from one of my monitored servers.

It is in a different domain, however DCOM has been configured through firewall, and up until today all seemed well.

The AlertRepositoryLogFile.log file contains these entries (IP address obscured for secutiry reasons)


12:30:19.442|Error |AlertRepository |11 |The object invoked has disconnected from its clients. - query 'select FreeSpace,Size,Name,FileSystem from Win32_LogicalDisk where DriveType=3'
12:31:22.588|Error |AlertRepository |11 |The object invoked has disconnected from its clients. - query 'select Handle,Name,CreationDate,KernelModeTime,UserModeTime,WorkingSetSize,VirtualSize from Win32_Process'
12:32:04.050|Error |AlertRepository |34 |The object invoked has disconnected from its clients. - query 'select Handle,Name,CreationDate,KernelModeTime,UserModeTime,WorkingSetSize,VirtualSize from Win32_Process'
12:32:19.188|Error |AlertRepository |12 |The object invoked has disconnected from its clients. - query 'select FreeSpace,Size,Name,FileSystem from Win32_LogicalDisk where DriveType=3'
12:32:49.745|Error |AlertRepository |22 |The object invoked has disconnected from its clients. - query 'select Handle,Name,CreationDate,KernelModeTime,UserModeTime,WorkingSetSize,VirtualSize from Win32_Process'
12:33:16.328|Warn |AlertRepository |8 |ServerUpMonitor: COM Error 0x80010108 from xxx.xxx.xxx.xxx
12:38:13.417|Info |AlertRepository |26 |SqlServerInstance: xxx.xxx.xxx.xxx is now up
12:38:17.291|Info |AlertRepository |8 |Server: xxx.xxx.xxx.xxx is now up.


Any ideas of why this may be happening? Or possible causes?


Kev

SQL Response v1.2.0.219
kevriley
0

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  • kevriley
    An update...

    I changed the gateway of the alert repository pc to avoid the proxy(MS ISA Server) to see if that had any effect - it didn't.

    Put the machine back on the proxy, and since then haven't had a repeat of the issue.

    So as far as it seems, it was just a temporary issue that seems to have 'fixed' itself.



    Kev
    kevriley
    0
  • kevriley
    Not sure if this is related .....

    now getting 'Computer unreachable' alerts, with the log entry of

    ServerUpMonitor: COM Error 0x800706A from xxx.xxx.xxx.xxx


    Any ideas?


    Kev
    kevriley
    0
  • Brian Donahue
    We've had a bit of success in using Windows built-in wbemtest.exe utility to test WMI connectivity.
    Start->run: wbemtest.exe

    Click "connect". Enter \\xxx.xxx.xxx.xxx\root\CIMV2
    Click "query" (if you have not already got an error)
    Enter "select Handle,Name,CreationDate,KernelModeTime,UserModeTime,WorkingSetSize,VirtualSize from Win32_Process"

    The results for this query should come back rather quickly, if not, maybe a network latency issue is to blame. You may want to try running this query over and over again to see if it's consistent. If it doesn't work at all, try disabling any firewalls between the two machines, or follow the instructions from Microsoft:
    http://msdn.microsoft.com/en-us/library/ms809327.aspx
    Brian Donahue
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