PK49995: WHEN THREADSAFE OPENAPI LE ENABLED ASSEMBLER PROGRAM LOOPED IT CAUSES CICS TO COME DOWN DUE WITH A DFHPC0409 BEING ISSUED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A THREADSAFE OPENAPI LE enabled Assembler program looped
  and DFHKETIX ran and called DFHKESVC with
  KAFPB_FUNCTION = KAFPB_PERFORM_ABTERM.
  set in ABNORMALLY_TERMINATE_TASK:
  This blew the L8 TCB away and caused the subsequent CHANGE_MODE
  calls back to this L8 tcb to fail
  CHANGE_MODE/EXCEPTION TCB_FAILED
  This was experienced by DFHEIP after EICC80 when LE issued a
  GETMAIN on exit from the request and so DFHEIP issued the AEXZ.
  The AEXZ caused LE to issue ABEND 4082.
  LE then issued a FREEMAIN and on exit DFHEIP and tried to
  CHANGE_MODE to the mode in EIS_PROGRAM_MODE and failed and again
  a AEXZ. DFHPC0409 is issued and CICS comes down.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All.                                         *
  ****************************************************************
  * PROBLEM DESCRIPTION: A threadsafe openapi LE enabled         *
  *                      Assembler program looped which resulted *
  *                      in DFHPC0409 and CICS terminates.       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A THREADSAFE OPENAPI application loops, running on an L8 TCB,
  and the RUNAWAY detection starts and the transaction correctly
  suffers an AICA abend. However it then also suffers an AEXZ
  abend followed by an abend 4082 and then another AEXZ. CICS is
  now terminated with the DFHPC0409. The AEXZ and 4082 abends are
  the result of CICS attempting to change the task back onto the
  L8 TCB it was running on, but which has now been deleted as a
  result of the AICA abend.
  
  Keywords: abendAEXZ abendAICA msgDFHPC0409 PC0409
  

Problem conclusion

• DFHAPLI1 has been altered in refstep kernel_error_abend_logic
  after the task has been set UNCLEAN to set eis_program_mode to
  '0000'X. This will ensure that the abending program will not
  attempt to switch back to the L8 TCB.
  

Temporary fix

•             *********
              * HIPER *
              *********
  FIX AVAILABLE BY PTF ONLY
  

Comments

• ž**** PE07/11/27 FIX IN ERROR. SEE APAR PK57033  FOR DESCRIPTION
  

APAR Information

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

  PK44963

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

  UK28909

Modules/Macros

•    DESLI1   DFHAPLI1
  

Fix information

• Fixed component name

  CICSTS V3 Z/OS

• Fixed component ID

  5655M1500

Applicable component levels

• R500 PSY UK28909

     UP07/09/09 P F709

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.