IC98975: WMQ V7.1 .NET APPLICATION HANGS AFTER STOPPING THE CHANNEL OR QUIESCING THE QUEUE MANAGER.

Fix Pack 7.1.0.6 for WebSphere MQ V7.1

APAR status

• Closed as program error.

Error description

• WebSphere MQ (WMQ) v7.1 client running a .NET applications hangs
  when the queue manager is quiesced or the channel is stopped.
  All subsequent .NET transactions are blocked.
  No FDCs are generated.
  
  output of dspmqtrn for the queue manager shows many transactions
  in a PREPARE state.
  
  dspmqtrn -a -m QMGR1 | grep PREPARED
  TRANSTATE(PREPARED)
  TRANSTATE(PREPARED)
  TRANSTATE(PREPARED)
  
  
  Additional Symptom(s) Search Keyword(s):
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of WebSphere MQ .Net Client in managed mode
  
  
  Platforms affected:
  Windows
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  When the client/server connection channel in use by applications
  connected using the .Net managed client, is stopped or the queue
  manager shut down the connections are not terminated cleanly,
  and can cause the application to hang.
  

Problem conclusion

• MQ .Net client code was reworked to improve locking strategy and
  recognise and handle changes in connection status correctly.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v7.1       7.1.0.6
  v7.5       7.5.0.5
  
  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

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