The NetIQ AppManager Client Communications Manager Service (CCM) has intermittent communication fail (NETIQKB33846)

The NetIQ AppManager Client Communications Manager Service (CCM) has intermittent communication failures.

The following messages are displayed in the Microsoft Windows Application Event Log:

NetIQccm ADMIN message: [1056] CCM is having intermittent communication/map file full failures while communicating with MS <10.25.68.76>. 43 of 141 attempts failed within the last 60 minute(s). Last attempt: succeeded.
NetIQccm ADMIN message: [912] Ping MS <10.109.112.228> fail with error 1

The log file \netiq\temp\netIQ_Debug\\CCMTRACE.LOG on AppManager agent computers may contain repeated occurrences of the following message:

1090359027 [976] cmrpcv2-netPing: failed to send probe to ms <10.109.112.228> 154/253 times ret=1722

In some network environments, you have to tune the servers hosting the AppManager Management Servers to maintain consistent availability of the service to all agents.

To drastically improve availability of the Management Server, make the following modifications to the HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\AFD\Parameters\ registry key of the Management Server:


DynamicBacklogGrowthDelta
    DWORD
    10
 
   EnableDynamicBacklog
    DWORD
    1
 
   MinimumDynamicBacklog
    DWORD
    20
 
   MaximumDynamicBacklog
    DWORD
    20000

You may have to manually create the sub-keys with the values listed above.  Be sure you have a backup copy of the registry prior to any modifications.  In addition, you will have to restart the NetIQ AppManager Management Server service for these changes to take effect.

This is a routine informational message that the AppManager agent writes to the event log.  Ignore these messages if the managed client appears normal in the Operator Console and events and data are being communicated to the Management Server.

However, if this event message frequently appears on more than one agent and the message indicates a failure rate over 50%, the management server may be experiencing problems that require the following intervention. 

Formerly known as NETIQKB33846

Warning: Using the Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. NetIQ cannot guarantee that problems resulting from the incorrect use of Registry Editor can be resolved. Make sure that you backup your Registry prior to making any changes.

Microsoft Knowledge Base Article - 14264: 'Internet Server Unavailable Because of Malicious SYN' explains how certain network traffic causes applications listening for network traffic to become unresponsive, and includes tips on tuning servers to avoid such problems. The article is at:

• http://support.microsoft.com/default.aspx?scid=kb;en-us;142641