PH51254: MISSING SUBSCRIPTIONS FOR CLUSTER OBJECTS USED BY VERY LONG LIVED APPLICATIONS 23/02/23 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When applications keep cluster objects open for longer than the
  30 day subscription expiry time, resulting in the subscriptions
  being remade, the refresh flag is not always propagated into the
  new subscriptions being made for these cluster objects
  correctly. When the remade subscription expires, this can lead
  to missing updates to cluster objects.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 2 Modification 0 and                 *
  *                 Release 3 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: Updates to infrequently used cluster    *
  *                      objects are not received due to a       *
  *                      prematurely expiring subscription on a  *
  *                      partial repository.                     *
  ****************************************************************
  After a cluster object has expired through disuse, but while it
  is still in the grace period and present in the partial
  respository's cluster cache, an application opens the object
  again.
  During cluster maintenance the code added by PH43191 detects
  the queue is back in use and creates a new subscription for it,
  however it does not set the subscription refresh flag.
  If the object is no longer in use the next time cluster
  maintenance runs, this can lead to the subscription expiring
  prematurely, and results in updates to the cluster object not
  being sent to the partial repository after it has expired.
  

Problem conclusion

• rrmMaintainSub will now detect that there are registrations for
  the cluster object, and correctly determine whether the refresh
  flag should be set.
  

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:

  UI90706 UI90707

Modules/Macros

• CMQXRMNT
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R200 PSY UI90707

     UP23/03/08 P F303 {

• R300 PSY UI90706

     UP23/03/08 P F303 {

Fix is available

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