Fix (APAR):  PQ94285

Status:  Fix

Release:  5.1.1

Operating System:  All

Supersedes Fixes:  

CMVC Defect:  PQ94285

Byte size of APAR:  9828

Date: 2004-11-29

Abstract:  System deadlocks when running multiple process instances with corelation sets.

Description/symptom of problem:  1) Symptom:
   --------

   The problem occurs when running multiple process instances with correlation 
   sets with parallel users. Some  of the instance creation request end in a 
   transaction timeout. 

2) Problem:
   --------

   The instance locator component that resolved the process instances uses
   synchronized methods and they hold a database connection. This constellation
   lead to deadlocks.
   
3) Solution:
   ---------

   Replacing the synchronized methods and rewriting the use of member variables
   solved this problem. 

Directions to apply fix:  

NOTE:  YOU MUST FIRST DOWNLOAD THE FIX INSTALLER TOOL IN ORDER TO INSTALL AN FIX.
       The Fix Installer can be downloaded from the following link:
       http://www-3.ibm.com/software/webservers/appserv/support/index.html

Directions to apply fix:  NOTE:  YOU MUST FIRST DOWNLOAD THE UPDATE INSTALLER TOOL IN ORDER TO INSTALL A FIX.
       The Fix Installer can be downloaded from the following link:
       http://www-3.ibm.com/software/webservers/appserv/support/index.html

1) Create temporary "fix" directory to store the jar file:
             UNIX: /tmp/WebSphere/fix
          Windows: c:\temp\WebSphere\fix

2) Copy jar file to the directory

3) Shutdown WebSphere

4) Follow the Fix installation instructions that are packaged with the Fix Installer on how to install the Fix.

5) Restart WebSphere

6) The temp directory may be removed.

Directions to remove fix:  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

2) Follow the instructions that are packaged with the Fix Installer on how to uninstall the Fix.

3) Restart WebSphere

Directions to re-apply fix:  1) Shutdown WebSphere

2) Follow the Fix instructions that are packaged with the Fix Installer on how to uninstall and reinstall the Fix.

3) Restart WebSphere

Additional Information: