PM93805: WEBSPHERE MQ V7: SYSTEM.BASE.TOPIC SUBSCOPE SETTING OF QMGR IS NOT HONOURED BY REFRESH QMGR TYPE(PROXYSUB)

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• In a grandparent<->parent<->child publish/subscribe hierarchy
  the root SYSTEM.BASE.TOPIC administrative topic on the parent
  queue manager has its SUBSCOPE property set to QMGR.
  
  Wildcard subscriptions from the grandparent queue manager e.g.
  Topic_Name/# are blocked at the parent queue manager because
  Topic_Name inherits the SUBSCOPE property of QMGR from
  SYSTEM.BASE.TOPIC.
  
  If the command "REFRESH QMGR TYPE(PROXYSUB)" is issued on
  the parent queue manager then proxy subscriptions to
  Topic_Name/# are incorrectly passed from the
  parent to the child.
  
  Messages which are then published to Topic_Name from the child
  queue manager are passed through to subscribers on the
  grandparent queue manager node.
  
  It was found that the code was not honouring the
  SYSTEM.BASE.TOPIC setting of QMGR on the parent when deciding
  whether to flow Topic_Name to the child queue manager during a
  REFRESH QMGR TYPE(PROXYSUB) command.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
  *                 Release 0 Modification 1 and Release 1       *
  *                 Modification 0.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Incorrect proxy subscription created    *
  *                      for a wildcarded topic that specified   *
  *                      SUBSCOPE(QMGR), when REFRESH QMGR       *
  *                      TYPE(PROXYSUB) is issued in a           *
  *                      distributed publish/subscribe           *
  *                      configuration.                          *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When deciding whether to flow a subscription to a child queue
  manager, the wrong constant for QMGR was being checked.  This
  resulted in subscriptions incorrectly being flowed to child
  queue managers, despite SUBSCOPE being set to QMGR which should
  have limited the scope of subscriptions made to a topic.
  

Problem conclusion

• The code was changed so that the correct constant was being used
  when determining whether to flow a subscription or not.
  010Y
  100Y
  CMQXMKMI
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IV43006

• APAR is sysrouted TO one or more of the following:

  UI14559 UI14560

Modules/Macros

• CMQXMKMI
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R010 PSY UI14559

     UP14/03/04 P F403

• R100 PSY UI14560

     UP14/03/04 P F403

Fix is available

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