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

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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 number

    IC64755

  • Reported component name

    WMQ WINDOWS V7

  • Reported component ID

    5724H7220

  • Reported release

    700

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2009-11-20

  • Closed date

    2009-11-30

  • Last modified date

    2009-12-16

  • 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

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Document Information

Modified date:
16 December 2009