PI28987: WMQ CSQMLPLM CSQMPOM ABEND 0C4 ABN=0C4-00000011 CSQV086E 00E5070REASON=00E50702

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• MQ terminated with the following messages in the log,
  CSQV086E +CSQ1 QUEUE MANAGER ABNORMAL TERMINATION
  REASON=00E50702
  .
  IEA794I SVC DUMP HAS CAPTURED:
  DUMPID=001 REQUESTED BY JOB
  DUMP TITLE=CSQ1,ABN=0C4-00000011,  ,C=R3600.710.MMC -
  CSQMPOM,M=CSQGFRCV,LOC=CSQMLPLM.CSQMPOM+0000059E
  00E50702 CSQMLPLM CSQMPOM ABEND 0C4 S0C4 RC11 0C4-11
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
  *                 Release 1 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: Abend 0C4 occurs in CSQMLPLM.CSQMPOM    *
  *                      when event messages are written to a    *
  *                      shared event queue, or trigger messages *
  *                      are written to a shared initiation      *
  *                      queue.                                  *
  *                      In some trigger related cases, the      *
  *                      abend does not occur, however           *
  *                      unexpected trigger messages are         *
  *                      generated.                              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When putting internally generated messages to a shared queue
  (for example, when putting trigger messages or event messages),
  CSQMPOM is called against a queue that has not been opened. In
  these situations, CSQMPOM should automatically open the shared
  queue in order to do the put operation, however prior to doing
  this, it attempts to access the STRB for the structure hosting
  the queue using the queue's sqtoken. If the queue has not been
  used in the last 10 minutes, it is possible that the sqtoken for
  the queue has not been set, resulting in an attempt to access an
  invalid address and the reported abend 0C4.
  
  For TRIGTYPE(EVERY) trigger messages, it is possible that
  CSQMPOM is being called to generate a trigger message despite
  the initiation queue not being open. In this case, the reported
  abend will occur if the sqtoken has not been set, however if the
  sqtoken is set, unexpected additional trigger messages will be
  generated.
  

Problem conclusion

• CSQMPOM is changed to open the shared queue if required,
  ensuring that the sqtoken has been set, prior to locating the
  STRB.
  
  CSQMREF2 is changed to check whether the initiation queue is
  open under latch control, preventing the unexpected trigger
  messages being generated.
  100Y
  CSQMPOM
  CSQMREF2
  

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:

  PI33372 UI24836

Modules/Macros

• CSQMPOM  CSQMREF2
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R100 PSY UI24836

     UP15/03/04 P F503 ¢

Fix is available

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