PQ51717: JAVA.LANG.NULLPOINTEREXCEPTION IN WAS FOR Z/OS APPLICATION SERVER REGION WHEN MULTIPLE CLIENT REQUESTS ARE PROCESSED

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APAR status
Closed as program error.

Error description
java.lang.NullPointerException occurred in com.ibm.ws390.tx.
TransactionSynchronizer.beforeCompletion (or afterCompletion).
This problem happens when multiple client requests are processed
in application Server Region.
Local fix Problem summary
****************************************************************
* USERS AFFECTED: All users of WebSphere Application Server    *
*                 V4.0 for z/OS and OS/390.                    *
****************************************************************
* PROBLEM DESCRIPTION: Exceptions IllegalStateException and    *
*                      NullPointerException may be encountered *
*                      in server regions configured with       *
*                      multiple threads.                       *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
Subordinate nodes in a distributed transaction may encounter
exceptions IllegalStateException and NullPointerException while
driving synchronization objects in the server region. This
problem only occurs in multi-threaded server regions and is
caused when the wrong JVM representation of the transaction is
driven for before/after Completion. The problem is the result
of two representations of the transaction getting out of sync
when LE heap storage is reused.
Problem conclusion
The reported problem was fixed by ensuring that the JVM
representation of the transaction remains in sync with the
runtime representation.

APAR PQ51717 is associated with SERVICE LEVEL W400029 of
WebSphere Application Server V4.0 for z/OS and OS/390.
Temporary fix Comments
APAR information
APAR number PQ51717
Reported component name WASKBASE
Reported component ID 5655A9801
Reported release 400
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Submitted date 2001-08-24
Closed date 2001-08-29
Last modified date 2001-10-02

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Modules/Macros
BBOUBINF BBOZ0812 BBOZ0813      

Fix information
Fixed component name WASKBASE
Fixed component ID 5655A9801

Applicable component levels
R400 PSY UQ57256    UP01/09/06 P F109

  Fix is available
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Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server for z/OS
Operating system(s):
Software version: 400
Software edition:
Reference #: PQ51717
IBM Group: Software Group
Modified date: Oct 2, 2001