PM84529: ABN=5C6-00C51183,S=00000C17,C=R3600.710.CFM -CSQERRPB,M=CSQGFRCV,LOC=CSQELPLM.CSQERRPB+0000222C

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• An abend occurred:
  TITLE: ssid,ABN=5C6-00C51183,S=00000C17,C=R3600.710.CFM
   -CSQERRPB,M=CSQGFRCV,LOC=CSQELPLM.CSQERRPB+0000222C
   .
   Symptom         Description
  -------          -----------
  PIDS/5655R3600   Program id: 5655R3600
  RIDS/CSQELPLM#L  Load module name: CSQELPLM
  RIDS/CSQERRPB    Csect name: CSQERRPB
  AB/S05C6         System abend code: 05C6
  PRCS/00C51183    Abend reason code: 00C51183
  REGS/0E016       Register/PSW difference for R0E: 016
  REGS/C1994       Register/PSW difference for R0C:-1994
  RIDS/CSQGFRCV#R  Recovery routine csect name: CSQGFRCV
  .
   OTHER SERVICEABILITY INFORMATION
     Date Assembled:          20111013
     Module Level:            12.52GA
     Subfunction:             CFM  CSQERRPBLOG REPLAY
  .
  CSQE132I !MQZ3 CSQERRPB Structure recovery started,
            using log range from LRSN=CAD915EFCA71 to
      LRSN=CAD990A47582
  CSQE022E !MQZ3 CSQERRPB Structure FLASH1 unusable,
            size is too small
  IEA794I SVC DUMP HAS CAPTURED:
  DUMPID=006 REQUESTED BY JOB (CSQ3MSTR)
  DUMP TITLE=CSQ3,ABN=5C6-00C51183,S=00000C17,C=R3600.710.
  CFM -CSQERRPB,M=CSQGFRCV,LOC=CSQELPLM.CSQERRPB+0000222C
  .
  The structure FLASH1 is reaching the limit of
  it's capacity, and when the write to it fails,
  the QMGR abends with 5C6-00C51183 and the
  structure is failed, after retrying for 60 secs
  to allow for any auto-alteration in the structure
  size to take place.
  In this case it seems that the structure is already
  at the maximum  size of the policy, which means that
  the write cannot succeed.
  .
  The reason for the repeated abends is that auto
  recovery is set on for the structure.
  This means that whenever the structure fails, an
  automatic recovery is scheduled. As the recovery
  process fails due to the size of the structure,
  a dump is taken and another recovery scheduled.
  This goes on until the recovery succeeds or the
  automatic recovery of the structure is turned off.
  the structure in a more sensible way.
  .
  

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: After a CF structure failure, the queue *
  *                      manager abends with 5C6-00C51183 when   *
  *                      recovering the structure, and CSQE022E  *
  *                      messages are issued in the job log.     *
  *                      The CF structure stays in a failed      *
  *                      state.                                  *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When defining a CF structure policy with the ALLOWAUTOALT
  parameter set to YES, the structure layout, i.e. the entry to
  element ratio, can be changed by z/OS according to usage.
  In the scenario where a structure is used either for very small
  messages, or very large, the ratio can be changed towards either
  1 entry for 2 elements, or 1 entry for 256 elements (these are
  example figures). This increases the usable storage in the CF
  structure.
  However, when the structure fails, and MQ reconnects to it, the
  entry to element ratio will be changed back to the default MQ
  ratio, which is 1 entry for 6 elements.
  Thus the CF structure may run out of space during recovery
  processing. If the automatic alteration process initiated by
  z/OS does not complete within the 60 second time frame MQ waits,
  message CSQE022E is issued followed by abend 5C6-00C51183.
  

Problem conclusion

• The code has been changed to keep track of structure alterations
  affecting the entry to element ratio. This is used when
  recovering the structure if the following condition is met:
  
  The queue manager in the QSG recovering the structure has to
  have been running during at least one prior structure alteration
  that caused an EEPLALTEREND event to be triggered.
  010Y
  100Y
  CSQECONN
  CSQESEX
  CSQESTOP
  CSQESTRT
  CSQEWRKT
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

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

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

  UK94003 UK94004

Modules/Macros

• CSQECONN CSQESEX  CSQESTOP CSQESTRT CSQEWRKT
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R010 PSY UK94003

     UP13/06/14 P F306 Ž

• R100 PSY UK94004

     UP13/06/14 P F306 Ž

Fix is available

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