PH15755: INTERMITTENT AEXZ ABEND DURING WSACONTEXT BUILD.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Receiving intermittent AEXZ abends during WSACONTEXT BUILD.
  .
  The following Trace Entry is produced.
  .
  1C01 PIAD EXIT  - FUNCTION(CONTEXT_BUILD) RESPONSE(DISASTER)
                    REASON() CONTEXT_BUILD(22026E4E , 0000005F ,
                    0000005F) XML_OFFSET(0)
  .
  The problem is in the build_maps routine in DFHPIAD.  It is
  iterating over the array of possible addressing properties.
  However, its array is of size 8 but there are 9 properties so
  the processing of the ninth property is dependent on residual
  data, which can cause the disaster response to be returned.
  .
  Additional Symptom(s) Search Keyword(s): KIXREVBDB
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users                               *
  ****************************************************************
  * PROBLEM DESCRIPTION: Abend AEXZ on an EXEC CICS WSACONTEXT   *
  *                      BUILD TOEPR command.                    *
  ****************************************************************
  An application issues EXEC CICS WSACONTEXT BUILD TOEPR.DFHPIAD
  procedure build_maps iterates over the array of possible
  addressing properties. The array is of size 8 but there are 9
  properties, The 9th entry in the array is not initialised
  however, and the resultant undefined value may cause the
  build_map routine to be called with a type of map_epr, which it
  is not expecting. This causes the disaster response to be
  returned and an abend AEXZ as a result of DFHPIAD returning
  DISASTER.
  KEYWORDS: abendaexz MAP_NAME_ARRAY_LENGTH PI1C08 PI1C09
  

Problem conclusion

• DFHPIAD has been changed to correctly initialise the
  piad_map_parms array.
    In addition, the diagnostics produced by DFHPIAD have
  been enhanced to generate better FFDC when different error
  conditions are detected, to assist with future problem
  determination. New trace points tid_piad_unexpected_mtype
  and tid_piad_debug (PI 1C08 and PI 1C09) have been defined for
  use on calls to severe_error in these circumstances.
  

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:

  UI67493 UI67494 UI67495

Modules/Macros

• DFHPIAD  DFHPIADT DFHPITRI DFJ@H360
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R100 PSY UI67493

     UP20/01/23 P F001

• R10D PSY UI67494

     UP20/01/23 P F001

• R200 PSY UI67495

     UP20/01/23 P F001

Fix is available

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