PH50279: ABEND 0C4-00000004, M=CSQGFRCV,LOC=CSQMLPLM.CSQMTPUT

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• An abend 0C4-00000004
  -CSQMTPUT, M=CSQGFRCV,
  LOC=CSQMLPLM.CSQMTPUT was occurring
  because the QRPL_END_THREAD request was not
  being handled correctly by Omegamon for MQ).
  .
  In the dump that the MQ Change Team
  analyzed  from the 0C4 in CSQMTPUT,
  this was occurring when CICS tran Y766
  was trying to put to a topic object.
  The 0C4 occurs after CSQMTPUV has detected
  that the CICS transaction has previously
  reached commit phase 1, but the unit of work
  has not gone to phase 2 commit processing.
  The reason for this is that the CICS
  transaction issued a QRPL_PREPARE request
  followed by a QRPL_END_THREAD request, but
  the QRPL_END_THREAD request was passed to
  CSQMPRH2 for processing, which is incorrect
  so the request was rejected with
  MQRA_INVALID_QRPL_CMD.
  The QRPL_END_THREAD request should be processed
  by CSQMCETH. We could see that the customer
  was using Omegamon for MQ, and this intercepts
  requests between CSQMCPRH and CSQMPRH2.
  Therefore the problem here was that Omegamon
  was intercepting the QRPL_END_THREAD request,
  and was passing the request to CSQMPRH2 rather
  than CSQMCETH.
  .
  This problem is also possible when putting a message to a
  topic with an invalid MQMD or MQPMO. This results in CSQMTPUV
  returning MQRC_MD_ERROR to CSQMTPUT which results in the S0C4
  abend.
  .
  Additional Symptom(s) Search Keyword(s):
  ABEND0C4 ABENDS0C4 S0C4 S00C4
  .
  +DFHMQ0480 E 03/19/2017 20:56:34 CICSPAOR MQCC=2
  MQRC=2195 QRPL at X'1BF4B2B0' FRB at X'1B0B4EF0'.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 1 Modification 0, Version 9 Release  *
  *                 2 Modification 0 and Version 9 Release 3     *
  *                 Modification 0.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Abend S0C4 may occur when putting a     *
  *                      message to a topic and internal         *
  *                      validation of the put request fails.    *
  ****************************************************************
  If an internal error occurs during put validation of a message
  to a topic, then an S0C4 abend may occur when subsequent
  processing uses an uninitialized pointer to a control block.
  

Problem conclusion

• Processing has been amended to ensure that the control block
  pointer is valid before using it.
  

Temporary fix

Comments

APAR Information

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

  PI81445

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

  UI83549 UI83550 UI83551

Modules/Macros

• CSQMTPUT
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R100 PSY UI83551

     UP22/12/23 P F212

• R200 PSY UI83550

     UP22/12/23 P F212

• R300 PSY UI83549

     UP22/12/23 P F212

Fix is available

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