IC64755: WMQ JMS 7 CLIENT ENCOUNTERS MQJMS1016 AND NULL POINTER EXCEPTION WHEN RECEIVING MESSAGES

WebSphere MQ V7.0 Fix Pack 7.0.1.2
WebSphere MQ V7.0.1 for i5/OS Fix Pack 7.0.1.2

APAR status

• Closed as program error.

Error description

• The Java Message Service (JMS) client application receives a
  message using asynchronous delivery under a transacted session.
  It encounters a NullPointerException, and an FDC is generated
  with the following Exception stack:
  
  Exception :- ExceptionDepth is 2
  Exception :-
  Cause:1 :- java.lang.NullPointerException
  StackTrace:1 :- java.lang.NullPointerException
  at
  com.ibm.msg.client.wmq.v6.jms.internal.MQMessageConsumer.
  commitIfRequired(Unknown Source)
  at
  com.ibm.msg.client.wmq.v6.jms.internal.MQMessageConsumer.
  receiveAsync(Unknown Source)
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  This issue affects WebSphere MQ V7 classes for JMS applications
  that connect to a version 6 queue manager and receive messages
  asynchronously using Message Listeners.
  
  Platforms affected:
  All Distributed (iSeries, all Unix and Windows) +Java
  ****************************************************************
  PROBLEM SUMMARY:
  The NullPointerException occurred if the Message Listener
  thread was processing a message asynchronously at the same time
  as another application thread tried to stop the Listener.
  
  The stop operation removed the Listener's reference to the JMS
  Session used to process the message before the message
  processing had completed. This led to a NullPointerException
  when the Message Listener thread came to commit the message it
  had just processed using its JMS Session.
  

Problem conclusion

• The stop operation no longer removes the Listener's reference
  to the JMS Session it is using. This allows any outstanding
  message processing to complete before the Message Listener is
  stopped.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v7.0
  Platform           Fix Pack 7.0.1.2
  --------           --------------------
  Windows            U200316
  AIX                U829807
  HP-UX (PA-RISC)    U829678
  HP-UX (Itanium)    U829681
  Solaris (SPARC)    U829806
  Solaris (x86-64)   U829680
  iSeries            tbc_p700_0_1_2
  Linux (x86)        U829677
  Linux (x86-64)     U829676
  Linux (zSeries)    U829682
  Linux (Power)      U829679
  
  The latest available maintenance can be obtained from
  'WebSphere MQ Recommended Fixes'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
  
  If the maintenance level is not yet available, information on
  its planned availability can be found in 'WebSphere MQ
  Planned Maintenance Release Dates'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
  ---------------------------------------------------------------
  

Temporary fix

Comments

APAR Information

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

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  WMQ WINDOWS V7

• Fixed component ID

  5724H7220

Applicable component levels

• R700 PSY

     UP