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IC88182: A DOTNET APPLICATION RECEIVES NULLREFERENCEEXCEPTION INSTEAD OF A WEBSPHERE MQ RETURN CODE.

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APAR status

  • Closed as program error.

Error description

  • A WebSphere MQ dotnet Client application connects to a remote
    queue manager using the transport property,
    TRANSPORT_MQSERIES_MANAGED.
    
    If a channel security exit is used on queue manager side and
    if the exit closes the connection for any reason, the
    application fails with following stack trace on the
    console:
    
    Unhandled Exception: System.NullReferenceException: Object
    reference not set to an instance of an object.
    at IBM.WMQ.MQFAPConnection.AsyncFailureNotify(Exception ex,
    Boolean quiescing)
    at IBM.WMQ.MQRcvThread.Run()
    at System.Threading.ThreadHelper.ThreadStart_Context(Object
    state)
    at System.Threading.ExecutionContext.Run(ExecutionContext
    executionContext, ContextCallback callback, Object state)
    at System.Threading.ThreadHelper.ThreadStart()
    
    An error should be returned such as MQRC_Q_MGR_NOT_AVAILABLE,
    MQRC=2059 to the application not a NullPointer exception.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    WebSphere MQ v7.0.1 managed .NET applications only. This problem
    is not applicable to WebSphere MQ v7.1 and v7.5.
    
    Platforms affected:
    Windows
    
    ****************************************************************
    PROBLEM SUMMARY:
    The WebSphere MQ managed .NET application crashes instead of
    reporting an error when the connection is closed by the
    security exit. The System.NullReferenceException is thrown
    while accessing a member variable of a null object.
    

Problem conclusion

  • The WebSphere MQ code is modified to check if the object is
    null before accessing a member variable.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
                       v7.0
    Platform           Fix Pack 7.0.1.10
    --------           --------------------
    Windows            U200352
    
    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

    IC88182

  • Reported component name

    WMQ WINDOWS V7

  • Reported component ID

    5724H7220

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-11-13

  • Closed date

    2012-11-28

  • Last modified date

    2012-11-28

  • 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

  • R710 PSY

       UP

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Document Information

Modified date:
28 November 2012