Fix (APAR):  PK43452

Status:  Fix

Release:  6.1.1.2,6.1.1.1,6.1.1,6.1.0.7,6.1.0.5,6.1.0.3,6.1.0.2,6.1.0.1,6.1,6.0.2.9,6.0.2.8,6.0.2.7,6.0.2.6,6.0.2.5,6.0.2.4,6.0.2.3,6.0.2.2,6.0.2.19,6.0.2.17,6.0.2.15,6.0.2.13,6.0.2.11,6.0.2.1,6.0.2

Operating System:  AIX,HP-UX,Linux,Linux pSeries,Linux Red Hat - pSeries,Linux zSeries,Solaris,Windows

Supersedes Fixes:  PK32069

CMVC Defect:  PK43452

Byte size of APAR:  714346

Date: 2007-04-23

Abstract:  A NullPointerException occurs in DRSGroup.logMessage().

Description/symptom of problem:  
PK43452 resolves the following problem:

ERROR DESCRIPTION:                                              
NullPointerException in DRSGroup.send can occur during          
stress when DRS logs messages indicating congestion is          
occurring.                                                      
[3/10/07 20:23:05:471 EST] 000000c9 SystemErr     R             
java.lang.NullPointerException                                  
at                                                              
com.ibm.ws.drs.model.DRSGroup.logMessage(DRSGroup.java(Compiled 
Code))                                                          
at com.ibm.ws.drs.model.DRSGroup.send(DRSGroup.java(Compiled    
Code))                                                          
at                                                              
com.ibm.ws.drs.stack.DRSAsyncSend.processSendMessage(DRSAsyncSen
d.java                                                          
(Compiled Code))                                                
at                                                              
com.ibm.ws.drs.stack.DRSStack.processSendMessage(DRSStack.java(C
ompile                                                          
d Code))                                                        

LOCAL FIX:                                                      
N/A                                                             

PROBLEM SUMMARY

USERS AFFECTED:
All users of IBM WebSphere Application
Server version 6 using Data Replication
Services (DRS).

PROBLEM DESCRIPTION:
A NullPointerException occurs in
DRSGroup.logMessage().

RECOMMENDATION:
None

A NullPointerException occurs in DRSGroup.logMessage() during
stress.

PROBLEM CONCLUSION:                                             
The NullPointerException occurred when DRS was attempting to    
log a message to indicate congestion is occurring.  An          
uninitialized variable is now properly initialized.             
                                                                
The fix for this APAR is currently targeted for inclusion in    
fixpack 6.0.2.21 and 6.1.0.9. Please refer to the Recommended   
Updates page for delivery information:                          
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980   


Directions to apply fix:  

Fix applies to Editions:
Release 6.0
__ Application Server (Express or BASE)
x_ Network Deployment (ND)
__ WebSphere Business Integration Server Foundation (WBISF)
__ Edge Components
__ Developer
__ Extended Deployment (XD)

Install Fix to:
Method:
x_ Application Server Nodes
__ Deployment Manager Nodes
__ Both

NOTE:
The user must:
* Have Administrative rights in Windows, or be the Actual Root User in a UNIX environments.
* Logged in with the same authority level when unpacking a fix, fix pack or refresh pack.
* Be at V6.0.2.2 or newer of the Update Installer. This can be checked by reviewing the level of the Update Installer in file <was_root>/updateinstaller/version.txt.

The Update Installer can be downloaded from the following link:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg21205991

For detailed instructions to Extract the Update Installer see the following Technote:
http://www-1.ibm.com/support/docview.wss?rs=180&uid=swg21205400

1) Copy PKxxxxx.pak file directly to the maintenance directory

2) Shutdown WebSphere
Manually execute setupCmdLine.bat in Windows or . ./setupCmdLine.sh in Unix from the WebSphere instance that maintenance is being applied to.

3) Launch Update Installer

4) Enter the installation location of the WebSphere product you want to update.

5) Select the "Install maintenance package" operation.

6) Enter the file name of the maintenance package to install (PKxxxxx.pak file which was copied in the maintenance directory).

7) Install the maintenance package.

8) Restart WebSphere

Directions to remove fix:  
NOTE:
* The user must have Administrative rights in Windows, or be the Actual Root User in a UNIX environments.
* FIXES MUST BE REMOVED IN THE ORDER 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, fix2 removed, and fix3 re-applied.

1) Shutdown WebSphere
Manually execute setupCmdLine.bat in Windows or . ./setupCmdLine.sh in Unix from the WebSphere instance that uninstall is being run against.

2) Start Update Installer

3) Enter the installation location of the WebSphere product you want to remove the fix.

4) Select  "Uninstall maintenance package" operation.

5) Enter the file name of the maintenance package to uninstall (PKxxxxx.pak).

6) UnInstall maintenance package.

7) Restart WebSphere

Directions to re-apply fix:  
1) Shutdown WebSphere.

2) Follow the Fix instructions to apply the fix.

3) Restart WebSphere.



Additional Information: