PI78131: TITLE CSQ1,ABN=5C6-00C94510,U=SYSOPR ,C=ccccc.nnn.DMC - CSQIMGES,M=CSQGFRCV,LOC=CSQILPLM.CSQIMGES

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The customer upgraded their Test MQ environment.
  They are experiencing the following dump at startup, but the
  queue manager appears to function without issues.
  .
  TITLE CSQ1,ABN=5C6-00C94510,U=SYSOPR  ,C=ccccc.nnn.DMC -
  CSQIMGES,M=CSQGFRCV,LOC=CSQILPLM.CSQIMGES
  .
  CSQI_ABEND_CFM_ERROR ('00C94510'x) - CFM problem recognised in
                                       DMC
  .
  The change team has reviewed the dump. The 5C6-00C94510 issued
  by CSQIMGES is occurring as MHND.pDPIVSA (addr of IVSA for
  SYSTEM.PENDING.DATA.QUEUE) is 0. This abend occurs when
  SYSTEM.PENDING.DATA.QUEUE is get-disabled. CSQMDPAT detects
  that this is the case, but does not close the queue correctly.
  This leads to subsequent problems such as the 5C6-00C94510
  issued by CSQIMGES.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 0 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: If the SYSTEM.PENDING.DATA.QUEUE is     *
  *                      GET disabled then the following abend   *
  *                      will be seen shortly after the queue    *
  *                      manager is started:-                    *
  *                      Abend 0C4 in CSQIMGES if the queue      *
  *                      manager is not in a queue sharing       *
  *                      group.                                  *
  *                      Abend S5C6-00C94510 if the queue        *
  *                      manager is in a queue sharing group.    *
  ****************************************************************
  If the SYSTEM.PENDING.DATA.QUEUE is GET disabled then CSQMDPAT
  will attempt to close the queue, but the ?MQCLOSE fails with a
  bad return code so certain queue handles and pointers are not
  reset.
  This means that when CSQMDPAT next runs it will cause CSQIMGES
  to be invoked which will fail with 5C6-00C94510.
  If the queue manager is not in a QSG then CSQIMGES fails 0C4
  when it tries to access the ETHR, which doesn't exist in a
  qmgr not in a QSG.
  

Problem conclusion

• CSQMDPAT has been changed so that the ?MQCLOSE will not
  produce a bad lretcode if the SYSTEM.PENDING.DATA.QUEUE is GET
  disabled thus avoiding the abends.
  

Temporary fix

Comments

APAR Information

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

  PI37151

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

  UI46495

Modules/Macros

• CSQMDPAT
  

Fix information

• Fixed component name

  MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R000 PSY UI46495

     UP17/05/19 P F705

Fix is available

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