PH58439: ABEND0C4 IN DFHDSKE OFFSET X'47A' AFTER FORCEPURGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• An abend AKEA due to an abend0c4 occurred after a FORCEPURGE
  of a transaction.
  The following message was given out:
  DFHDS0001 xxxxxxxx An abend (code 0C4/AKEA) has occurred at
                    offset X'047A' in module DFHDSKE.
  
  The ABEND0C4 program check was due to Register 1 containing an
  invalid address.
  R1 had been loaded with the MVS TCB address from a
  DFHDSDS_TCB control block which represented an L9 OPEN TCB.
  However, due to the FORCEPURGE, the MVS TCB had been detached,
  and the storage freed. Attempting to address the MVS TCB
  control block tripped the 0c4.
  
  Additional keywords: ABENDS0C4 S0C4 DSKE_RECOVERY
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All.                                         *
  ****************************************************************
  * PROBLEM DESCRIPTION: CICS is pointing to an address of a TCB *
  *                      that no longer exists. The data in this *
  *                      location causes an 0C4.                 *
  ****************************************************************
  Tasks running on L8 or L9 TCBs are abending and their ESTAE is
  driven for each one.
  PROCESS_DEAD_TCBS runs for each task twice, causing the
  ESTAE WAIT ECB to be posted and the TCBs to complete
  termination before the associated tasks.
  Task termination checks the associated L8/L9 TCB but the TCB
  address within the DS_TCB is no longer valid, so the data
  found there can cause 0C4s.
  

Problem conclusion

• DFHDSKE has been changed to check that the TCB is still
  available before attempting to refer to its address.
  

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:

  UI96063

Modules/Macros

• DFHDSKE
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R300 PSY UI96063

     UP24/03/15 P F403

Fix is available

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