PH39882: MQ 9.2: THE CLUSTER REPOSITORY MANAGER FAILS AFTER CSQX053E IN XFFSRRMMAINTENANCE DUE TO MQRC_SYNCPOINT_LIMIT_REACHED 2024

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• In the reported case, the CHIN job log contained messages:
  
  CSQX053E +TM1T CSQXFFST Error information recorded in CSQSNAP
  data set
  CSQX053E +TM1T CSQXFFST Error information recorded in CSQSNAP
  data set
  CSQX448E +TM1T CSQXREPO Repository manager stopping because of
  errors.
   Restart in 600 seconds
  
  In the CSQSNAP DD, there were dumps with eyecatchers:
  
  *                X...XFFSrrmMaint*
  *enance..................MOVR....*
  *..n....}X...XINS................*
  *................................*
  *SYSTEM.CLUSTER.REPOSITORY.QUEUE.*
  *TM1T............................*
  *................                *
  
  In the hex data of the snap dump, there were words with
  20009510 which means rrcE_MQGET_FAILED
  20009511 which means rrcE_MQPUT_FAILED
  
  The trace in a SLIP dump showed that 000007E8 (decimal 2024)
  for MQRC_SYNCPOINT_LIMIT_REACHED led up to the MQPUT failure
  with 20009511.
  
  A change that was included in MQ 9.2.0 altered how the
  repository manager task tracks the number of actions performed
  in a single unit of work. The calculation is now wrong, which
  results in some repository manager work receiving the
  MQRC_SYNCPOINT_LIMIT_REACHED error.
  .
  Additional keywords and symptoms:
  XFFSrrmMaintenance rrmMaintenance
  .
  CSQX416E CSQXREPO Repository command processing error,
  RC=20009511, command code 00000001
  cluster object <object name>
  sender <qmid>
  
  CSQX038E CSQXREPO Unable to put message to
  SYSTEM.INTER.QMGR.FANREQ, MQCC=2 MQRC=2024
  (MQRC_SYNCPOINT_LIMIT_REACHED)
  
  CSQX878I CSQXREPO Repository command error,
  command REFRESH
  cluster object <object>
  sender <qmid>
  reason=20009511
  

Local fix

• Temporarily increase MAXUMSGS to see if that prevents MQRC 2024
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 2 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: When committing actions performed by    *
  *                      the repository it is possible to reach  *
  *                      MAXUMSGS, typically resulting in the    *
  *                      cluster repository task ending with     *
  *                      message CSQX448E due to errors. An      *
  *                      FFST may also be issued from            *
  *                      rrmMaintenance, and as a result         *
  *                      message CSQX053E might also be issued.  *
  ****************************************************************
  The code that is responsible for calculating the number of
  actions performed in a single unit of work in cluster
  repository manager processing was incorrect. This resulted in
  some repository manager work receiving an
  MQRC_SYNCPOINT_LIMIT_REACHED (2024) error.
  

Problem conclusion

• The code has been changed to correct the calculation, therefore
  preventing the cluster repository task from receiving
  MQRC_SYNCPOINT_LIMIT_REACHED and subsequently ending.
  

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:

  UI79411

Modules/Macros

• CMQXRMNT CMQXRRMF
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R200 PSY UI79411

     UP22/03/11 P F203

Fix is available

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