Fix (APAR):  PM37444

Status:  Fix

Release:  6.1.1.3

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

Supersedes Fixes:  

CMVC Defect:  xxxxxx

Byte size of APAR:  114078

Date: 2011-07-21

Abstract:  Dynamic weights are not calculated correctly by dynamic workload management (DWLM) in certain situations.

Description/symptom of problem:  
PM37444 resolves the following problem:

ERROR DESCRIPTION:                                              
Provide ability to disable usage of EJB statistics in the       
calculation of dynamic weight for a dynamic cluster member.     
This is required in certain situations, such as, when EJB       
traffic is not being sent through the ODR and there is no need  
to load balance the EJB traffic, or EJB traffic is driven       
through the web artificats like servlets and web service time   
is inclusive of EJB response time.                              

LOCAL FIX:                                                      
N/A                                                             

PROBLEM SUMMARY

USERS AFFECTED:
 All users of WebSphere Virtual Enterprise
who are using dynamic clusters that have
Enterprise JavaBeans (EJB) and web
applications

PROBLEM DESCRIPTION:
Dynamic weights are not calculated
correctly by dynamic workload
management (DWLM) in certain
situations.

RECOMMENDATION:
None

The ability to disable the usage of EJB statistics when
calculating dynamic weight for a dynamic cluster member should
be supported. This support is required in certain situations,
such as when EJB traffic is not sent through the ODR and there
is no need for the load balancing of the EJB traffic. Another
example of when this support is needed is when EJB traffic is
driven through web artificats.

PROBLEM CONCLUSION:                                             
The issue is fixed by setting the ignoreEJBStats custom         
property to true at the cell or dynamic cluster level. Setting  
the custom property at the cell level affects all the dynamic   
clusters in the cell, which must be recycled for the custom     
property changes to take effect. When the custom property is    
set to true, DWLM ignore EJB statistics during the weight       
calculation. The default value for the custom property is       
false.                                                          
                                                                
This fix will be included in the next available fix pack for    
WebSphere Virtual Enterprise.                                   


Directions to apply fix:  Install Fix to:
__ Application Server Nodes
__ 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 V6.1.0.17 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 6.1.1.3-WS-WXD-IFPM37444.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 (6.1.1.3-WS-WXD-IFPM37444.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 (6.1.1.3-WS-WXD-IFPM37444.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: