Fix (APAR):  PQ98256

Status:  Fix

Release:  4.0.7,4.0.6,4.0.5

Operating System:  All

Supersedes Fixes:  Pre-requisite Fixes:    PQ97609

CMVC Defect:  PQ98256

Byte size of APAR:  1088662

Date: 2004-12-10

Abstract:  HEAVY INTER-SERVER TRANSACTIONAL WORK CAN CAUSE A SERVER TO  HANG

Description/symptom of problem:  
When running a heavy distributed workload across two servers
using interop mode, one of the servers appeared to hang. That
is, no new work was being started, and transactions were not
completing successfully.
CoordinatorImpl class will be updated so that when a transaction is
imported from another server, the registration back to the superior
server will be done while not holding a lock.



Directions to apply fix:  

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

2) Copy jar file to the directory

3) 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.

4) Run the jar file with the following command answering questions/prompts as they appear:
   java -jar PQ98256_Fix.jar

5) Restart WebSphere

6) The temp directory may be removed but the jar file should be saved.  Do not remove
   any files created and stored in the <WASHOME>/WebSphere/AppServer/fix/<fix> directories.
   These files are required if a fix is to 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) Change directory to the fix location (<WASHOME>/WebSphere/AppServer/fix/<fix#>).

2) 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.

3) Run the backup jar file with the following command:
   java -jar PQ98256_Fix_backup.jar

4) Restart WebSphere



Directions to re-apply fix:  
Follow the instructions for applying a fix.

If the backup files still exist (from the previous fix application), you will be prompted to overwrite.

Answer "yes" at the overwrite prompts.



Additional Information: