IT41811: IBM MQ .NET applications hang during reconnection when connectedto a uniform cluster.

APAR status

• Closed as program error.

Error description

• An IBM MQ .NET application hangs indefinitely during
  reconnection, when the application is trying to rebalance when
  connected to a uniform Cluster
  

Local fix

• NA
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All MQ.NET & XMS .NET applications using Client Auto Reconnect
  and connecting to a Queue Manager which is part of a uniform
  cluster
  
  
  Platforms affected:
  Windows
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  In the problem scenario a Client Auto reconnect enabled .NET
  application created two or more connections to the queue
  Mmanager which is part of a uniform cluster. During rebalancing
  the queue manager sends a RECONNECT flow with the Qmid to one of
  the connections created by the application as the MQ .NET client
  should disconnect both the connections and reconnect to the QMID
  suggested by the Queue manager. A logic error meant that the IBM
  MQ .NET libraries attempted reconnection only on one connection
  handle, which meant that the rebalancing of the application did
  not complete .
  

Problem conclusion

• IBM MQ .NET client logic has been modified to correct the
  behaviour for reconnect flow.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.2 LTS   9.2.0.7
  v9.3 LTS   9.3.0.2
  v9.x CD    9.3.2
  
  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

  MQ BASE V9.2

• Fixed component ID

  5724H7281

Applicable component levels