PH63707: MQ Z/OS: 0C4-00000011 ABEND IN CSQMSET

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The S0C4 abend below occurred when dereferencing an MHND
  pointer in CSQMSET as part of an MQSET api call. The pointer
  value was 0x7FFFF000 which resulted in the abend when
  dereferenced. The MHND is obtained from the input HOBJ by
  indexing into the handle pointer vector table (MHPV). There
  wasn't an MHPV allocated to the CHIN thread because it had
  never done an MQOPEN and the input HOBJ was thus
  MQHO_UNUSABLE_HOBJ. This resulted in a bad address getting
  picked up for the MHND and the return code getting set to
  MQRC_HOBJ_ERROR.
  Before returning to the caller, if TRACE(STATS) CLASS(5) is
  enabled, then CSQMSET tries to increment queue stats. This
  abends S0C4 due to the bad MHND address. It follows that a
  workaround for this problem is to disable TRACE(STATS) CLASS(5).
  CSQ1,ABN=0C4-00000011,U=SETUP,C=MQ900.940.MMC -CSQMSET
  ,M=CSQGFRCV,LOC=CSQMLPLM.CSQMSET +00000F70
  

Local fix

• Disable TRACE(STATS) CLASS(5)
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 4 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: When issuing an MQSET in bindings mode  *
  *                      with class 5 trace enabled and no       *
  *                      object handle, an 0C4-11 abend occurs.  *
  ****************************************************************
  The code responsible for tracing statistics about objects in an
  MQSET call doesn't check whether an object handle is available,
  resulting in an abend when the code tries to use the object
  handle.
  

Problem conclusion

• The code has been changed to check whether a handle is available
  for an object before trying to trace statistics about the
  object.
  

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:

  UO03610

Modules/Macros

• CSQMSET
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R400 PSY UO03610

     UP25/07/12 P F507

Fix is available

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