Fix (APAR):  PK67725

Status:  Fix

Release:  6.0.2.1,6.1.0.1

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

Supersedes Fixes:  

CMVC Defect:  PK67725

Byte size of APAR:  172415,182281,182379

Date: 2008-06-25

Abstract
One cluster gets the request far more often than the other cluster.
 
Download Description
PK67725 resolves the following problem:

ERROR DESCRIPTION:
This APAR is to fix Multi--Cluster Routing Policy (MCRP) load balancing. In particular, the weighted least outstanding request (WLOR) algorithm does not
equitably distribute requests among the clusters specified by the MCRP policy. The algorithm will be adjusted to ensure a proper balance.


LOCAL FIX:
None

PROBLEM SUMMARY

USERS AFFECTED:
All users of IBM® WebSphere® Extended Deployment using an On-Demand Router

PROBLEM DESCRIPTION:
On-Demand Router is not load balancing properly

RECOMMENDATION:
None

When using a Multi-Cluster Routing Policy with WLOR (weighted least outstanding requests), one of the clusters receives many more requests than the other.

PROBLEM CONCLUSION:

The fix for this APAR is currently targeted for inclusion in Fix Pack 6.0.2.3 and 6.1.0.3.

Please refer to the Recommended Updates page for delivery information:
http://www.ibm.com/support/docview.wss?rs=3023&uid=swg27005709 


Directions to apply fix:  
Install Fix to:
_X_ Application Server Nodes
_X_ Deployment Manager Nodes
_X_ Both

NOTE:
The user must have Administrative rights in Windows, or be the Actual Root User in a UNIX environments. Also, you should be logged in with the same authority level when unpacking a fix, fix pack or refresh pack.

DOWNLOAD THE UPDATE INSTALLER TOOL IN ORDER TO INSTALL A FIX.
The Fix Installer can be downloaded from the following link:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg21205991

The Update Installer for V5.0 does not have a maintenance directory. It uses fixpacks and fixes as the location of the unpacked files.

Customers must 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.

1) Copy PK67725.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 (PK67725.pak file which was copied in the maintenance directory).  The V5.0 and V5.1 fix packs and fixes are unpacked as .jar files and should be unpacked into fixpacks or fixes 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.

NOTE:  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 (PK67725.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: