Cisco SCE 1000 Series Service Control Engine

January 23, 2007

NOTICE:

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Products Affected

Problem Description

The management agent in the SCE runs a thread that is responsible for performing different operations if the SM/SCE subscriber API connections are down for more than a configurable timeout. The management agent fails to kill this thread at the end of its run; thus, when there is a high number of disconnections, a large number of threads are created and the free memory of the JVM is reduced to a point where the garbage collection takes a significant time and causes performance degradation.

Background

SCE platform runs Java-based management agent which is responsible for PRPC connections between the SCE and SM / SCE Subscriber API / SCA-BB site manager / serveconf application.

Problem Symptoms

1. Failure to apply application configuration - GUI does not finish the apply and gets disconnected

2. Reduction of logon operations rate on the SM/SCE subscriber API. This can be verified by running netstat -a command on the SM/SCE API machine. The TCP window for the SCE experiencing the described problem is decreased to 0. See following example:

   Local Address Remote Address Swind Send-Q Rwind Recv-Q State 
   ... 
   sm01.58305 215.193.18.81.14374 40960 0 49664 0 ESTABLISHED 
   sm01.58306 215.193.18.82.14374 0 0 49664 0 ESTABLISHED
   

Workaround/Solution

Solution:

SCE 3.0.5 release contains a solution to this problem.

Workaround:

Possible workaround procedure:

1. Run the following CLI in order to shutdown the agent:

   SCE2000(config)#>no service management-agent
   

2. Run the following command to verify the management agent is down:

   SCE2000(config)#>do show management-agent 
   management agent is disabled. 
   management agent is not active 
   management agent does not use any access-list.
   

3. Run the following CLI in order to startup the agent:

   SCE2000(config)#>service management-agent
   

4. Run the following command to verify the management agent is up:

   SCE2000(config)#>do show management-agent 
   management agent is enabled. 
   management agent is active, version: SCE Agent 3.0.3 Build 20 
   management agent does not use any access-list.
   

If one of the stages fails SCE reload is required.

DDTS

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Revision History

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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