PH63120: DFHDS0001 0C4 AKEA IN DFHDSKE AFTER DB2 CRASHED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• In CICS dump, it shows an 0C4 in DFHDSKE procedure
  FREE_OPEN_TCBS. This new APAR is to back-port APARs 6.1/PH54493
  and 5.6/PH58439 to CICS TS 5.5
  .
  Additional keywords: abend0c4 abends0c4
  

Local fix

• No
  

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  address within the DS_TCB is no longer valid, so the data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:

  UI98389

Modules/Macros

• DFHDSKE
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R200 PSY UI98389

     UP24/09/13 P F409

Fix is available

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