PK47033: POINTER ERRORS AFTER DRF RECOVERY WITH HDAM DATABASE

APAR status

• Closed as program error.

Error description

• Pointer errors after DRF recovery with HDAM DB
  From the HPPC output the HI-U-RBA was calculated something like
  '8A2E4000'x.  DRF treated this as a signed value so it interpret
  -ed this as a negative number.
  This problem only applies to recoveries using SMS type ICs for
  VSAM databases.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: IMS users with IMS Database Recovery         *
  *                 Facility Version 3 Release 1 installed and   *
  *                 uses SMS type image copies.                  *
  ****************************************************************
  * PROBLEM DESCRIPTION: After a database recovery performed by  *
  *                      Database Recovery Facility V3R1 (DRF)   *
  *                      returns a RC=0, a seperate Pointer      *
  *                      Checker job reports pointer errors.     *
  ****************************************************************
  * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
  ****************************************************************
  When processing SMS-type image copies for HDAM databases, DRF
  obtains the HI-U-RBA of the database data set to determine the
  end.  This is used to compare against the RBA from update
  records so updates may either be applied to existing database
  blocks or written out to extend the database.
  
  The HI-U-RBA is normally obtained as a fullword value.
  However, it was determined that in the event that the high-
  ordered-bit of the HI-U-RBA is on, then it needs to be obtained
  as a doubleword value.
  

Problem conclusion

• AIDS: RIDS/UTIL RIDS/DBS DBS/UTIL
    DEP: NONE
    GEN:
  
  *** END IMS KEYWORDS ***
  FRXIVSM0 is changed to check if the high-orderd-bit of the
  HI-U-RBA obtained from the database data set is ON.  If it is
  ON then DRF needs to save a copy of the HI-U-RBA as a double-
  word value.
  
  FRXRBUF0 is changed to not discard the last buffer containing
  log updates during timestamp recoveries.
  

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:

  UK26229 PK48045

Modules/Macros

• FRXIVSM0 FRXRBUF0
  

Fix information

• Fixed component name

  IMS DB RECOVERY

• Fixed component ID

  5655I4400

Applicable component levels

• R310 PSY UK26229

     UP07/06/20 P F706