PI68182: WMQ ABEND 5C6 00E50002 CSQVUNLX,M=CSQVLFRR,LOC=CSQMLPLM.CSQMMTPRCHIN CHINIT ABENDS5C6 S5C6

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• CHIN CHINIT abends with ABEND 5C6 00E50002
  ABN=5C6-00E50002,LOC=CSQMLPLM.CSQMMTPR+000023CE
  .
  DUMP:
  ABN=5C6-00E50002,U=MQPDCHIN,C=W9700.800.ASMC-CSQVUNLX,M=CSQVLFRR
  ,LOC=CSQMLPLM.CSQMMTPR+00002386
  .
  The MTME has been released by CSQMMTIN while CSQMMTPR
  (mark_msg_token processing) is waiting to obtain a latch on it.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All users of IBM MQ for z/OS Version 9 Release 0             *
  * Modification 0.                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * Application browsing messages from a queue using             *
  * MQGMO_MARK_BROWSE_CO_OP or MQGMO_MARK_BROWSE_HANDLE can      *
  * generate abend 5C6-00E50002 in CSQMMTPR.                     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * N/A                                                          *
  ****************************************************************
  The access serialization of browse message marks is incorrect
  and it sometimes allows multiple threads to perform simultaneous
  updates of the same mark resulting in 5C6-00E50002 abend.
  

Problem conclusion

• The serialization access to the MTME has been corrected
  preventing simultaneous updates to the same MTME.
  

Temporary fix

Comments

APAR Information

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

  PI60685

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

  UI40758

Modules/Macros

• CSQEMTIN CSQMMTIN CSQMMTPR
  

Fix information

• Fixed component name

  MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R000 PSY UI40758

     UP16/10/14 P F610

Fix is available

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