IC92326: MQ V7.0.1: SYSTEM.NET.SOCKETS.SOCKETEXCEPTION WHEN .NET APPLICATION DISCONNECTS.

WebSphere MQ V7.0 Fix Pack 7.0.1.11

APAR status

• Closed as program error.

Error description

• During a disconnect by a .NET application, a
  System.Net.Sockets.SocketException is reported.  Trace shows:
  Socket locked for receive
  System.Net.Sockets.SocketException (0x80004005): An established
  connection was aborted by the software in your host machine
  at System.Net.Sockets.Socket.BeginReceive(Byte?? buffer,
  Int32 offset, Int32 size, SocketFlags socketFlags, AsyncCallback
  callback, Object state)
  at IBM.WMQ.MQTCPConnection.ReceiveData(Byte??& cBuffer,
  Int32& offset, Int32& length)
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  WebSphere MQ v701 .NET applications running in managed mode.
  
  Platforms affected:
  Windows
  
  ****************************************************************
  PROBLEM SUMMARY:
  The MQ .NET application reports
  System.Net.Sockets.SocketException with the error message,
  "An established connection was aborted by the software in your
  host machine."
  
  This error occurs after the application thread sends a
  connection close request to the server following which the
  server closes the conversation. Meanwhile the MQ receiver
  thread created to service the application thread tries to send
  a heartbeat packet to the server following a failed receive.
  The socketexception is reported when the heartbeat is sent on
  a socket that is already closed by the server.
  

Problem conclusion

• The MQ .NET code is modified so that the heartbeat is only sent
  when the receiver times out after waiting to receive data from
  the server.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following:
  
                     v7.0
  Platform           Fix Pack 7.0.1.11
  --------           --------------------
  Windows            7.0.1.11
  
  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

• R701 PSY

     UP