PI43758: WMQ Z/OS: ABEND0C4 IN CSQMMTPR DURING SHUTDOWN WHEN SYSTEM.CHLAUTH.DATA.QUEUE HAS NOT BEEN DEFINED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• An abend occurs during shutdown:
  ABN=0C4-00000011,U=xxxxxxx ,C=R3600.710.MMC -CSQMMTPR,
  M=CSQGFRCV,LOC=CSQMLPLM.CSQMMTPR
  
  The failing instruction is BA06 5000, which is in CSQMMTPR+1D6E
  at the UI23964 level (the offset will vary for other levels of
  CSQMMTPR).
  
  Reg5 is bad. The source of the bad address is IVSA.PMARKTABLE,
  which points to an address that has been freed.
  
  The 0C4 occurs during shutdown when SYSTEM.CHLAUTH.DATA.QUEUE
  has not been defined. This results in an attempt to put an
  event message to SYSTEM.ADMIN.QMGR.EVENT. However, the
  mark-table for this queue has already been deleted, hence the
  0C4 occurs.
  
  A follow-on symptom may be:
  ABN=5C6-00E50002,U=MQMVERS ,C=R3600.710.MMC -CSQMMTPR,
  M=CSQGFRCV,LOC=CSQMLPLM.CSQMMTPR
  
  00E50002 means "UNLATCH REQUEST AND LATCH NOT OWNED BY
  REQUESTING EB".  The 0C4 interfered with the latching process.
  
  Additional Symptom(s) Search Keyword(s):
  ABEND0C4 ABENDS0C4 S0C4 S00C4 0C4
  ABEND5C6 ABENCS6C6 S5C6 S05C6 5C6
  MTTB  STOP QMGR
  

Local fix

• Define SYSTEM.CHLAUTH.DATA.QUEUE. Reference the definition in
  CSQ4INSA in SCSQPROC.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
  *                 Release 1 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: Abend 0C4 occurs in CSQMMTPR when       *
  *                      master address space is terminating.    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  During queue manager termination CSQMESTP calls rsxAccessCache
  (CSQTXACH) which tries to open queue SYSTEM.CHLAUTH.DATA.QUEUE.
  However if this queue has not been defined then the open fails
  and an event message is written to SYSTEM.ADMIN.QMGR.EVENT.
  CSQIMPU2 calls CSQMMTPR which tries to access the queue's
  mark table (IVSA.pMarkTable).
  However CSQMESTP has already set MGBL.fMTTermReq, and the
  CSQMMTIN task may have already deleted the mark table so the
  thread abends with 0C4.
  

Problem conclusion

• CSQMESTP has been changed so that rsxAccessCache is called
  before the mark table is deleted.
  100Y
  CSQMESTP
  

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:

  PI47734 UI30744

Modules/Macros

• CSQMESTP
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R100 PSY UI30744

     UP15/10/07 P F510

Fix is available

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