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

WebSphere MQ V7.0 Fix Pack 7.0.1.10

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 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