Fix (APAR):  PK53356

Status:  Fix

Release:  6.1.0.9,6.1.0.7

Operating System:  AIX,HP-UX,i5/OS,Linux,Linux pSeries,Linux zSeries,OS/400,Solaris,Windows

Supersedes Fixes:  

CMVC Defect:  PK53356

Byte size of APAR:  9362

Date: 2007-11-06

Abstract:  If a connection to a messaging engine from a client JMS application is closed while messages are being consumed by that application, it is possible for the messaging engine to ente

Description/symptom of problem:  
PK53356 resolves the following problem:

ERROR DESCRIPTION:                                              
A deadlock may occur internally within a service integration    
bus messaging engine, if a JMS connection is closed while       
messages are being consumed via that connection.                

LOCAL FIX:                                                      
Restart the messaging engine.                                   

PROBLEM SUMMARY

USERS AFFECTED:
Users of the default messaging provider for
WebSphere Application Server V6

PROBLEM DESCRIPTION:
If a connection to a messaging engine
from a client JMS application is
closed while messages are being
consumed by that application, it is
possible for the messaging engine to
enter a deadlock that prevents
further connections from being
established.

RECOMMENDATION:
None

This issue is very timing sensitive.
If this issue occurs, a thread dump of the application server
will show two threads in the following methods:
* com/ibm/ws/sib/comms/server/clientsupport/
ServerTransportAcceptListener.getActiveConversations()
* com/ibm/ws/sib/processor/impl/JSLocalConsumerPoint.close()

PROBLEM CONCLUSION:                                             
This APAR resolves the issue.                                   


Directions to apply fix:  
NOTE: Choose the:
1) Release the fix applies to
2) The Editions that apply
3) Delete the Editions & Methods that do not apply and this Note

Fix applies to Editions:
Release 6.0
x_ Application Server (Express or BASE)
x_ Network Deployment (ND)
__ WebSphere Business Integration Server Foundation (WBISF)
__ Edge Components
__ Developer
__ Extended Deployment (XD)

Install Fix to:
Method:
x_ Application Server Nodes
__ Deployment Manager Nodes
__ Both

NOTE:
The user must:
* Have Administrative rights in Windows, or be the Actual Root User in a UNIX environments.
* Logged in with the same authority level when unpacking a fix, fix pack or refresh pack.
* 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.

The Update Installer can be downloaded from the following link:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg21205991

For detailed instructions to Extract the Update Installer see the following Technote:
http://www-1.ibm.com/support/docview.wss?rs=180&uid=swg21205400

1) Copy PKxxxxx.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 (PKxxxxx.pak file which was copied in the maintenance 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.
* 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 (PKxxxxx.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: