PK07272: FREQUENT NULLPOINTEREXCEPTIONS DURING SESSION MANAGER OPERATIONSAT DRSHTTPSESSCACHE.GETENTRY().

 A fix is available

Obtain the fix for this APAR



APAR status
Closed as program error.

Error description
Customer is seeing frequent NullPointerExceptions that appear
to be during session invalidation.  The stacktrace is:
.
java.lang.NullPointerException
at com.ibm.ws.webcontainer.httpsession.DRSHttpSessCache.getEntry
   (DRSHttpSessCache.java:567)
at com.ibm.ws.drs.DRSJMS.handleReceivedMessage(DRSJMS.java:1322)
at com.ibm.ws.drs.DRSReceiveMessageTask.run(DRSReceiveMessageTas
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:672)
.
This occurs with the latest DRS maintenance applied.  This APAR
is being taken to roll up distributed APAR 
PK03077 which should
resolve this issue.
Local fix Problem summary
****************************************************************
* USERS AFFECTED: All users of WebSphere Application Server    *
*                 V5.0 for z/OS                                *
****************************************************************
* PROBLEM DESCRIPTION: The following NullPointerException is   *
*                      occurring during session invalidation   *
*                      in Memory-To-Memory mode:               *
*                      java.lang.NullPointerException          *
*                      at com.ibm.ws.webcontainer.httpsession  *
*                        .DRSHttpSessCache.getEntry            *
*                        (DRSHttpSessCache.java:567)           *
*                      at com.ibm.ws.drs.DRSJMS.               *
*                        handleReceivedMessage(DRSJMS.java:    *
*                        1322)                                 *
*                      at com.ibm.ws.drs.DRSReceiveMessageTas  *
*                        k.run(DRSReceiveMessageTask)          *
*                      at com.ibm.ws.util.ThreadPool$Worker.   *
*                        run(ThreadPool.java:672)              *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The Session Manager is not performing a non-null check before
invoking an operation on the object which caused the
NullPointerException.
Problem conclusion
The code was modified to perform the non-null check during
session invalidation.

APAR PK07272 is associated with SERVICE LEVEL W502031 of
WebSphere Application Server V5.0 for z/OS.
Temporary fix Comments
APAR information
APAR number PK07272
Reported component name WEBSPHERE FOR Z
Reported component ID 5655I3500
Reported release 500
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Special Attention NoSpecatt
Submitted date 2005-06-14
Closed date 2005-06-20
Last modified date 2005-07-01

APAR is sysrouted FROM one or more of the following:
PK05076

APAR is sysrouted TO one or more of the following:

Modules/Macros
BBOUBINF          

Publications Referenced

Fix information
Fixed component name WEBSPHERE FOR Z
Fixed component ID 5655I3500

Applicable component levels
R500 PSY UK04679    UP05/06/28 P F506

  Fix is available
Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.


Document Information


Current web document: swg1PK07272.html
Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server for z/OS
Operating system(s):
Software version: 500
Software edition:
Reference #: PK07272
IBM Group: Software Group
Modified date: Jul 1, 2005