Fix (APAR):  JR27204

Status:  Fix

Release:  6.0.2.2,6.0.2.1,6.0.2,6.0.1.6,6.0.1.5,6.0.1.4,6.0.1.3

Operating System:  AIX,HP-UX,Linux,Solaris,Windows

Supersedes Fixes:  

CMVC Defect:  JR27204

Byte size of APAR:  46310

Date: 2007-10-11

Abstract:  Memory Leak in WebSphere Process Server leads to slow response time to the end user.

Description/symptom of problem:  
JR27204 resolves the following problem:

ERROR DESCRIPTION:                                              
Web Clients for WPS get slower response as the number of Clients
/Users are increased and the system is stressed. Enabling       
verbose:gc shows Full Garbage Collection kicking in very        
frequently and taking up to 20s.                                
                                                                
[GC 1185487K->908033K(1526976K), 0.1526608 secs]                
[GC 1197185K->910930K(1526976K), 0.1562692 secs]                
[GC 1200082K->912921K(1526976K), 0.1560928 secs]                
[GC 1202073K->914976K(1526976K), 0.1500451 secs]                
[GC 1204128K->916587K(1526976K), 0.1535115 secs]                
[GC 1205739K->919496K(1526976K), 0.1536732 secs]                
[GC 1208648K->921751K(1526976K), 0.1504904 secs]                
[GC 1210903K->923927K(1526976K), 0.1500256 secs]                
[GC 1213079K->925918K(1526976K), 0.1491795 secs]                
[GC 1215070K->927822K(1526976K), 0.1474471 secs]                
[GC 1216974K->929687K(1526976K), 0.1467150 secs]                
[GC 1218839K->932235K(1526976K), 0.1526316 secs]                
[GC 1221387K->934446K(1526976K), 0.1492202 secs]                
[GC 1223598K->936452K(1526976K), 0.1450784 secs]                
[GC 1225604K->938955K(1526976K), 0.1508187 secs]                
[GC 1228107K->941865K(1526976K), 0.1564308 secs]                
[Full GC 1231017K->935205K(1526976K), 16.7226270 secs]          
[GC 1224357K->949621K(1526976K), 0.1833252 secs]                
[Full GC[Unloading class sun.reflect.GeneratedMethodAccessor69] 
 1238773K->934547K(1526976K), 16.9541045 secs]                  
[GC 1223699K->952467K(1526976K), 0.2482311 secs]                
[Full GC 1241619K->931269K(1526976K), 16.6816102 secs]          
[GC 1220421K->946140K(1526976K), 0.1642760 secs]                
[Full GC 1235292K->914260K(1526976K), 18.8584305 secs]          
[GC 1203412K->928362K(1526976K), 0.1665476 secs]                
[GC 1217514K->934204K(1526976K), 0.1721046 secs]                
[GC 1223356K->936943K(1526976K), 0.1542386 secs]                
[GC 1226095K->939434K(1526976K), 0.1552588 secs]                
[GC 1228586K->942328K(1526976K), 0.1553364 secs]                
[Full GC 1231480K->940723K(1526976K), 16.7443670 secs]          
[Full GC 1229875K->940597K(1526976K), 16.7518958 secs]          
[Full GC 1229749K->942514K(1526976K), 16.8394004 secs]          
[Full GC 1231666K->924448K(1526976K), 19.0560671 secs]          
[GC 1213600K->938238K(1526976K), 0.1669777 secs]                
[GC 1227390K->944643K(1526976K), 0.1785709 secs]                
[Full GC 1233795K->947445K(1526976K), 16.8504154 secs]          
[Full GC 1236597K->950853K(1526976K), 16.9379004 secs]          
[Full GC 1240005K->951679K(1526976K), 16.9988816 secs]          
[Full GC 1240831K->934111K(1526976K), 19.1255074 secs]          

LOCAL FIX:                                                      
N/A                                                             

PROBLEM SUMMARY

USERS AFFECTED:
WebSphere Process Server and WebSphere
Enterprise Service Bus 6.0.1 and 6.0.2
users.

PROBLEM DESCRIPTION:
Memory Leak in WebSphere Process
Server leads to slow response time to
the end user.

RECOMMENDATION:
None

Web Clients for WebSphere Process Server get slower response
as the number of Clients/Users are increased and the system
is stressed.
Enabling verbose:gc for the server shows Full Garbage
Collection kicking in very frequently and taking up to 20
seconds, indicating memory leak in the runtime.

PROBLEM CONCLUSION:                                             
Apply this interim fix to resolve the Memory leak.              


Directions to apply fix:  
Before applying the iFix ensure that WebSphere Process Server 6.0.1.3/4/5/6 or 6.0.2.0/1/2 is installed on the system.
Also 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. 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



Directions to re-apply fix:  
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) 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: