PM91058: ABEND 0C4 IN CSQIMPU2

Obtain the fix for this APAR.

APAR status

• Closed as unreproducible in next release.

Error description

• RIDS/CSQILPLM#L RIDS/CSQIMPU2 AB/S00C4 PRCS/00000010
  The abend occurs when attempting to put a COD report message
  to the dead-letter queue (in this case the COD is going to the
  DLQ as ReplyToQ does not exist).
   The problem is that CSQMREPM is invoking CSQMDLQP with the
  asid for the message data (and also the key) set to that of the
  queue-manager, but the message data is actually in the
  application address space, hence the 0C4 occurs in subsequent
  processing.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
  *                 Release 0 Modification 1.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: Issuing an MQGET on a message with      *
  *                      report option MQRO_COD_WITH_DATA set,   *
  *                      if the put to the specified reply to    *
  *                      queue fails (such as MQRC 2085, queue   *
  *                      not found), may result in a 0C4 abend   *
  *                      in CSQIMPU2, with no dump taken.        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  An MQGET of a message with a COD with data report type set
  (MQRO_COD_WITH_DATA and MQRO_COD_WITH_FULL_DATA), if the
  PUT of the report message to the specified reply to queue
  (ReplyToQ) fails, an attempt to put the report to the dead
  letter queue can result in a 0C4 abend. The abend does not cause
  a dump to be taken, and is shown in the getting application. No
  report is put to the dead letter queue.
  
  This occurs when the report message is attempted to be put to
  the dead letter queue, the put attempts to access the original
  messages buffer in the queue manager address space, when the
  message data in this scenario is in the applications address
  space.
  

Problem conclusion

Temporary fix

Comments

• The process to put a report to the dead letter queue has been
  altered to ensure the message data put to the queue is accessed
  through the correct address space of the message buffer. This
  ensures the message buffer can be accessed without the 0C4
  abend, and the resulting report contains the correct data.
  

APAR Information

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

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

  UK95414

Modules/Macros

• CSQMREPM
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R010 PSY UK95414

     UP13/08/23 P F308

Fix is available

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