PI54093: CLUSTER WORK LOAD BALANCE ISSUE WHEN USING IGQ ENABLED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When the application putting the messages to
  the cluster queue is connected to a queue-manager
  with IGQ enabled, the messages are getting
  workload-balanced twice (by the queue-manager which
  the application is connected to, and then by
  the queue-manager receiving the
  already-workload-balanced messages via IGQ).
  .
  This situation should not be occurring
  (the messages should only be workload-balanced by
  the queue-manager that the application is connected to).
  
  Additional Symptom(s) Search Keyword(s):
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 8 *
  *                 Release 0 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: Messages are not distributed as         *
  *                      expected to cluster queues if the       *
  *                      putting application is connected to a   *
  *                      queue manager which has Intra-group     *
  *                      queuing enabled.                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When messages are sent to remote cluster queues using IGQ
  and the local instance of the cluster queue is defined with
  BIND(NOTFIXED) then they are put to the
  SYSTEM.QSG.TRANSMIT.QUEUE with RemoteQmgrName blank in the XQH.
  On the receiving side these messages are considered to be
  eligible for workload balancing and many of them will be
  erroneously distributed a second time. IGQ should ensure
  that these messages are not redistributed in this situation.
  Additional keyword: PK32886
  

Problem conclusion

• CSQMPUTV has been changed to detect if the messages arrived via
  IGQ and not redistribute them.
  000Y
  CSQMPUTV
  

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:

  UI36553

Modules/Macros

• CSQMPUTV
  

Fix information

• Fixed component name

  WMQ Z/OS 8

• Fixed component ID

  5655W9700

Applicable component levels

• R000 PSY UI36553

     UP16/05/04 P F605

Fix is available

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