IBM Support

IZ87027: IBM XMS CLIENT DE-REGISTERING AN EXCEPTION LISTENER CAUSES A NULLREFERENCEEXCEPTION IN THE MQCB (MQ CALL BACK) FUNCTION

Fixes are available

WebSphere MQ V7.0 Fix Pack 7.0.1.5
WebSphere MQ V7.0.1 for i5/OS Fix Pack 7.0.1.5

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APAR status

  • Closed as program error.

Error description

  • A NullReferenceException is thrown when deregistering an
exception listener using the IBM Messaging Service Client for
.NET (XMS). The exception is thrown within a MQCB call.

Exception Stack:

Unhandled Exception: System.NullReferenceException: Object
reference not set to
an instance of an object.
at IBM.WMQ.Nmqi.UnmanagedNmqiMQ.MQCB(Hconn hConn, Int32
operation, MQCBD pCal
lbackDesc, Hobj hobj, MQMessageDescriptor pMsgDesc,
MQGetMessageOptions getMsgOp
ts, Int32& pCompCode, Int32& pReason)
at
IBM.XMS.Client.WMQ.WmqConnection.set_ExceptionListener(ProviderE
xceptionListener
value)
at
IBM.XMS.Client.Impl.XmsConnectionImpl.set_ExceptionListener
(ExceptionListenervalue)

Local fix

  • 



Problem summary


    

  • ****************************************************************
USERS AFFECTED:
XMS .NET client user connecting to WMQ and using the exception
listener in the application

Platforms affected:
Windows

****************************************************************
PROBLEM SUMMARY:
XMS .NET client sends the null object to the next layer(NMQI)
and this layer tries to access this object which results in the
null reference exception.

    



Problem conclusion


    

  • XMS .NET client code is modified to pass the default objects
instead of null objects to the next layer (NMQI).

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IZ87027
    • 

  • Reported component name
    MSG SRVCS CL .N
    • 

  • Reported component ID
    5724M2100
    • 

  • Reported release
    200
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2010-10-20
    • 

  • Closed date
    2010-11-02
    • 

  • Last modified date
    2010-11-02
    • 





    

  • 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
    MSG SRVCS CL .N
    • 

  • Fixed component ID
    5724M2100
    • 



Applicable component levels


    

  • R200  PSY
       UP
    • 








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            02 November 2010
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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