IT42550: The SYSTEM.DEFAULT.SUB object disappeared and an FDC with probe identifier KN483002 was generated.

APAR status

• Closed as program error.

Error description

• The SYSTEM.DEFAULT.SUB object disappeared.  An
  failure data capture (FDC) record was generated from amqzmuc0
  with a probe identifier
  of KN483002 and major error code MQRC_NO_MSG_AVAILABLE:
  
  ...
  | Component         :- kqiUpdateBucketEntry
                                    |
  | SCCS Info         :-
  /build/slot2/p920_P/src/lib/lqm/amqkdspa.c,            |
  | Line Number       :- 3081
  ...
  
  zmuThreadMain
  zmuDurableSubscriptionManagerTask
  kpiDurableSubscriptionManagerTask
  kqiReconcileDurableSubscribers
  kqiUpdateBucketEntry
  --
  

Local fix

• Enable command events for the queue manager to help audit any
  unexpected
  administration commands:
  
  ALTER QMGR CMDEV(NODISPLAY)
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  An administrator who has sufficient authority to clear the
  SYSTEM.DURABLE.SUBSCRIBER.QUEUE can cause this issue to occur.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  Investigation showed that the SYSTEM.DURABLE.SUBSCRIBER.QUEUE
  had been unexpectedly purged.  This queue stores the
  subscription definitions and so purging the messages caused
  these definitions to be deleted.
  

Problem conclusion

• A new environment variable has been added.  If the
  "AMQ_INHIBIT_PURGE_SDSQ" variable is set before starting a queue
  manager, then a lrcE_NOT_AUTHORIZED FDC with probe identifier
  KN021012 will be written if a user attempts to clear the
  SYSTEM.DURABLE.SUBSCRIBER.QUEUE.
  
  This change provides a way to avoid accidental removal of the
  state stored on the SYSTEM.DURABLE.SUBSCRIBER.QUEUE and also may
  help identify the circumstances under which the attempt to clear
  the queue was made.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.3 LTS   9.3.0.10
  v9.x CD    9.3.4
  
  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