Fix (APAR):  JR33247

Status:  Fix

Release:  6.2.0.1

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

Supersedes Fixes:  

CMVC Defect:  594101

Byte size of APAR:  9072

Date: 2009-06-09

Abstract:  When 20 users concurrently access the moduler browser from business space, the Health monitor REST services throws an exception.

Description/symptom of problem:  
JR33247 resolves the following problem:

ERROR DESCRIPTION:                                              
The Health monitor REST forwarder will return concurrent        
modification exception if a lot of requests were send at the    
same time.                                                      

LOCAL FIX:                                                      
None                                                            

PROBLEM SUMMARY

USERS AFFECTED:
Websphere Process Server v6.2.0.x users.

PROBLEM DESCRIPTION:
When 20 users concurrently access
the moduler browser from business
space, the Health monitor REST
services throws an exception.

RECOMMENDATION:
None

When the module browser widget invokes the Health monitor REST
services to get module status, the Health monitor REST
services uses the same internal user to create and discard an
internal session. When there are a lot of concurrent requests,
the session created might have been discarded and results in a
concurrent modification  exception.

PROBLEM CONCLUSION:                                             
Applying this interim fix will resolve the issue                
reported in this APAR.                                          


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: