IV33930: XMS .NET v2.0.0.3 client crashes with typecast exception when connection is lost due to a n/w breakage.

Fix Pack 7.1.0.3 for WebSphere MQ V7.1

APAR status

• Closed as program error.

Error description

• XMS .NET application connecting to WebSphere Application Server,
  using WebSphere Platform Messaging(WPM) connection mode with
  Asynchronous message listener being set for message delivery and
  Exception listener set for exception is running and the N/W
  cable is unplugged, then XMS .NET component crashes on WindowsXP
  in more or less few minutes time, and it crashes immediately on
  Windows 7, x64. Following exception will be raised.
  This crash will bring down the application and to reconnect a
  restart will be required.
  Unable to cast object of type 'ConversationTableEntry' to type
  'IBM.XMS.SIB.JFAP.IConversation' at
  IBM.XMS.SIB.JFAP.JFAPConnection.Dispose(Boolean
  disposing)at
  IBM.XMS.SIB.JFAP.ClientConnectionTracker.CloseConversationHandle
  

Local fix

• Restart the application (and hence loading the IBM.XMS.dll  and
  related dll's)
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  XMS .NET applications connecting to WebSphere Application Server
  
  Platforms affected:
  Windows
  
  ****************************************************************
  PROBLEM SUMMARY:
  Following the connection broken exception, XMS .NET client,
  tries to wake-up all its waiting threads and close them as the
  underlying connection is lost. During this process, it tried to
  close the Connection's Conversation entry, where it failed to
  typecast the object and this being in a worker thread within XMS
  .NET client code, it was raised as an unhandled exception
  causing the application crash.
  

Problem conclusion

• XMS .NET Client code has been fixed for incorrect typecasting.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v7.1
  Platform           Fix Pack 7.1.0.3
  --------           --------------------
  Windows            7.1.0.3
  
  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

  MSG SRVCS CL .N

• Fixed component ID

  5724M2100

Applicable component levels

• R200 PSY

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