Fix (APAR):  JR30566

Status:  Fix

Release:  6.0.2.4

Operating System:  AIX,HP-UX,i5/OS,Solaris,Windows

Supersedes Fixes:  

CMVC Defect:  xxxxxx

Byte size of APAR:  6161

Date: 2009-01-05

Abstract:  Potential memory leak observed when using interface maps and running the transactions on load.

Description/symptom of problem:  
JR30566 resolves the following problem:

ERROR DESCRIPTION:?                                             
All previously called references are being cached, which        
eventually results in high memory usage over time.              
                                                                
APAR is needed to limit the amount of references that are       
cached.                                                         

LOCAL FIX:?                                                     
none, restart required to clear cache.                          

PROBLEM SUMMARY:?

USERS AFFECTED:
Websphere Process Server 6.0.2.x customers


PROBLEM DESCRIPTION:
Potential memory leak observed when
using interface maps and running the
transactions on load.

RECOMMENDATION:
None


For better performance the process server engine relies on a
caching mechanism to cache the recently invoked services, as a
fresh locate of service can be performance intensive. Upon
load multiple references are being cached resulting in a
increased java heap size

PROBLEM CONCLUSION:?                                            
The problem is resolved by having a limit on the number of      
references that are cached. Using this fix will bring about     
40% efficiceny in the memory usage.                             


Directions to apply fix:  
Download and follow Update Installer installation instructions.  The Update Installer can be downloaded from the following link:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg21205991

1) Copy the pak file to the directory maintenance in the UpdateInstaller directory

2) Shutdown WebSphere Process Server. It is important that you perform a controlled and complete shutdown of the server to ensure that all transactions have completed, before installing the fix.

3) Run the UpdateInstaller and follow the prompts.

4) Restart WebSphere Process Server.

Directions to remove fix:  
NOTE:  FIXES MUST BE REMOVED IN THE REVERSE ORDER IN WHICH THEY WERE APPLIED.  DO NOT REMOVE A FIX UNLESS  ALL FIXES APPLIED AFTER IT HAVE FIRST BEEN REMOVED.  YOU MAY REAPPLY ANY REMOVED FIX.

Example:  If your system has fix1, fix2, and fix3 applied in that order and fix2 is to be removed, fix3 must be removed first, then fix2 may be removed

1) Shutdown WebSphere Process Server. It is important that you perform a controlled and complete shutdown of the server to ensure that all transactions have completed, before installing the fix.

2) Follow the Fix instructions that are packaged with the Fix Installer on how to uninstall and reinstall the Fix.

3) Restart WebSphere Process Server.

Directions to re-apply fix:  
1) Shutdown WebSphere. It is important that you perform a controlled and complete shutdown of the server to ensure that all transactions have completed, before installing the fix.

2) Run the UpdateInstaller and follow the instructions. The Update Installer can be downloaded from the following link:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg21205991

3) Restart WebSphere Process Server.

Additional Information: