IC67048: CONNECTION POOLING WITH WMQ V7 COM+ CLIENT DOES NOT WORK

WebSphere MQ V7.0.1 for i5/OS Fix Pack 7.0.1.3
WebSphere MQ V7.0 Fix Pack 7.0.1.3

APAR status

• Closed as program error.

Error description

• When using a WebSphere MQ v7.0.0.1 COM+ client to make a MQCONN
  call to the queue manager, after the channel is released the
  connection is not reused. A new connection will be established
  every time a new MQCONN is made.
  
  ADDITIONAL KEYWORDS: Windows COM Plus MQRESOURCE_TIMEOUT MQDISC
  disconnect pool cache cached .Net dot net
  

Local fix

• Use MQCONNX rather than MQCONN to connect.
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of MQ client applications running in a COM+
  environment using MQCONN rather than MQCONNX.
  
  Platforms affected:
  Windows
  
  ****************************************************************
  PROBLEM SUMMARY:
  The WebSphere MQ COM+ layer provides a client connection pool,
  such that when a disconnect is issued, the connection is not
  freed immediately and is instead left for potential reuse by
  the next connection. From 7.0.0.1, this connection pool fails
  to reuse the connections in the scenario when MQCONN is used
  because it fails to handle the case where no connection options
  are provided in both the original and current connection
  attempt.
  

Problem conclusion

• The COM+ layer has been modified to reuse connections when both
  the original connect and current connect calls supply no
  connection options, usually triggered by using an MQCONN call.
  
  | MDVREGR 7.0.0-WS-MQ-Windows-FP0001 |
  | MDVREGR 7.0.0-WS-MQ-Windows-FP0002 |
  | MDVREGR 7.0-WS-MQ-Windows-RP0001   |
  | MDVREGR 7.0.1-WS-MQ-Windows-FP0001 |
  | MDVREGR 7.0.1-WS-MQ-Windows-FP0002 |
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v7.0
  Platform           Fix Pack 7.0.1.3
  --------           --------------------
  Windows            U200320
  
  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

• R700 PSY

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