PI70594: WHEN IBM MQ GENERATES AMQ9469 CLUSTER MESSAGES, FDC FILES ARECREATED THAT DUMP THE CLUSTER CACHE LEADING TO LARGE FDCS

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• IBM MQ generates large FDCs with Probe Id RM191020 for the
  repository manager process (amqrrmfa)
  The FDCs are generated along with the reported AMQ9469 error
  message in the queue manager logs.
  They contain a full dump of the entire cached queue manager
  cluster configuration and can be numerous.
  As a result they can consume large  amounts of disk space.
  Examples:
  
  AMQ9469: Update not received for CLUSRCVR channel TO.QM1
  hosted on queue manager QM1_2016-01-01_11.11.11 in cluster
  CLUSTER1.
  
  EXPLANATION:
  The repository manager detected that the CLUSRCVR channel
  has not been re-published by its owning queue manager. This
  re-publish action should have happened automatically 4 days
  ago, or in the time between then and now.
  
  See the knowledge center for the full error message:
  
  http://www.ibm.com/support/knowledgecenter/en/SSFKSJ_8.0.0/com.i
  bm.mq.ref.doc/amq9.htm
  
      The FDC will show the following:
  
  Probe Id          :- RM191020
  Component         :- rrmMaintainClqMgr
  Program Name      :- amqrrmfa
  Thread            :- 1    Repository
  Probe Type        :- INCORROUT
  Probe Description :- AMQ6125: An internal WebSphere MQ error
  has occurred.
  Comment1          :- Repeated occurrences of AMQ9469
  
  MQM Function Stack
  amqrrfma_main
  rrmMain
  rrmRepository
  rrmGetMsg
  rrmRunTimers
  rrmMaintenance
  rfxEnumCLQMGR
  rrmMaintainClqMgr
  xcsFFST
  

Local fix

• The following environment variables can be exported to reduce
  the size of the FDCs being generated. The queue manager will
  need to be restarted after they are in place.
  .
  Unix:
    export AMQ_RRMFA_MSG_HISTORY=0
    export AMQ_RRMFA_SUPPRESS_CACHEDUMP=1
  Windows:
    set AMQ_RRMFA_MSG_HISTORY=0
    set AMQ_RRMFA_SUPPRESS_CACHEDUMP=1
  .
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All users of IBM MQ for z/OS Version 9 Release 0             *
  * Modification 0                                               *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * When CSQX469E messages are put out repeatedly, FFSTs are     *
  * produced. These are shown with a CSQX053E message being      *
  * produced, and the FFST information being written to          *
  * CSQXSNAP.                                                    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * N/A                                                          *
  ****************************************************************
  Message CSQX469E is produced when a CLUSRCVR channel has not
  been republished to the full repositories within a cluster.
  However, if this message is still being produced, such as in the
  cases it is known and expected, FFSTs will be issued 30 days
  into the grace period. The FFST written to CSQXSNAP will contain
  'Repeated CSQX469E'.
  

Problem conclusion

• The FFSTs in this case have been removed, and will no longer be
  produced for this scenario.
  

Temporary fix

Comments

APAR Information

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

  PI69996

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

  UI42117

Modules/Macros

• CMQXRMNT
  

Fix information

• Fixed component name

  MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R000 PSY UI42117

     UP17/01/10 P F701

Fix is available

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