PH01673: ABEND0C4 RC04 DSNXIBAT OFFSET06EE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When the abend occurred, the PSW pointed to DSNXIBAT + x'6EE'
  ST instruction 50E0 D130. The ABEND0C4 occurred because R13 was
  x'00000000'. When label XFRR in DSNXIBAT is invoked,  R1 is
  treated as SDWAPARM. But in this case SDWAPARM had x'00000BE0'.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Db2 11 and 12 users of                       *
  *                 attachment facilities.                       *
  ****************************************************************
  * PROBLEM DESCRIPTION: User receives ABEND 0C4-00000004 at     *
  *                      location DSNWAAP0.DSNXIBAT+06EE when    *
  *                      disconnecting from a Db2 attachment     *
  *                      facility.                               *
  ****************************************************************
  * RECOMMENDATION: Apply corrective PTF when available.         *
  ****************************************************************
  Users might receive ABEND 0C4-00000004 at location
  DSNWAAP0.DSNXIBAT+06EE when disconnecting from or terminating
  Db2 attachment facilities. Db2 incorrectly sets up a recovery
  routine environment during disconnect or termination processing.
  The ABEND occurs when a subsystem error happens during this
  environment setup and the setup leaves the subsystem in an
  incorrect state. If the subsystem error is an ABEND, this
  initial ABEND will generate the secondary ABEND 0C4-00000004
  that this APAR describes.
  
  The following is an example:
  1. User shuts down CICS and, as a result, CICS disconnects from
     Db2's CICS attachment facility.
  2. Db2 sets up a recovery routine environment, in case an error
     occurs during disconnect processing.
  3. An ABEND 04F occurs during recovery routine environment setup
     and this setup leaves the subsystem in an incorrect state.
  4. Db2 cannot continue with this incorrect state and issues
     secondary ABEND 0C4-00000004.
  

Problem conclusion

• Db2 is modified to correctly set up a recovery routine
  environment during disconnect or termination processing, which
  tolerates subsystem errors or ABENDs. Note that this APAR does
  not fix any errors or ABENDs outside of incorrect recovery
  routine environment setup.
  
  Additional Keywords:
  ABEND0C4
  RC00000004
  DSNWAAP0
  

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:

  UI62468 UI62469

Modules/Macros

•    DSNXIBAT
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RB10 PSY UI62469

     UP19/04/19 P F904

• RC10 PSY UI62468

     UP19/04/19 P F904

Fix is available

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