PH68293: LOGREC ENTRIES GENERATED WITH SYMPTOM STRING PIDS/5655MQ900 RIDS/CSQMGPLM#L RIDS/CSQMALCH AB/S00C4 PRCS/00000004 REGS/0E12A REG

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• LOGREC records symptom string values similar to : PIDS/5655MQ90
  RIDS/CSQMGPLM#L RIDS/CSQMALCH AB/S00C4 PRCS/00000004 REGS/0E12A
  REGS/A079A. The abending offset is for a failed MVCSK
  instruction. Development finds that these ABEND0C4 PIC 04 abends
  occur in procedure FreeMsgh in CSQMALCH when doing a
  cross-memory, cross-key copy of an AHSEG, which is a control
  block associated with a message handle. The problem is that the
  MVCSK uses an incorrect storage key for the move. Related, this
  problem could result in a leak of message handles in the
  application address space.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 3 Modification 0 and Release 4       *
  *                 Modification 0.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Abend 0C4 in module CSQMALCH is         *
  *                      recorded in LOGREC when messages        *
  *                      contain properties over 4K.             *
  ****************************************************************
  When CSQMCMHB is called to copy message properties into a
  Message Handle as part of an MQPUT or MQGET call, and the
  existing buffer size in the Message Handle is insufficient, a
  larger buffer is automatically allocated and the existing buffer
  should be marked to be freed on the next Message Properties MQI
  call (e.g. MQINQMP, MQSETMP ,MQCRTMH, MQDLTMH). An error in the
  code responsible for marking the existing buffer to be freed
  leads to an abend 0C4, which is recorded in LOGREC only, and no
  error is returned to the application. The 'freed' buffer storage
  will remain allocated until the Message Handle is deleted with
  MQDLTMH.
  

Problem conclusion

• CSQMALCH is changed to correctly mark the old buffer to be freed
  on the next Message Properties MQI call.
  

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:

  UO05773 UO05774

Modules/Macros

• CSQMALCH
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R300 PSY UO05774

     UP26/01/10 P F601

• R400 PSY UO05773

     UP26/01/10 P F601

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.