PK36124: DFSPREC0 ABEND U0853 ON RECOVERED HALDB PARTITION, POINTER CHECKER ABENDED S0C7 ON SAME PARTITION

APAR status

• Closed as program error.

Error description

• DFSPREC0 abends U0853 on recovered HALDB partition, Pointer
  Checker abended S0C7 on same partition. It appears that in a few
  cases a Change Accum record may contain more than one "change
  element" areas.  The second "change element" gets dropped in
  cases where there are no Image Copy records for the same RBA.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users with IMS Database Recovery         *
  *                 Facility Version 3 Release 1 installed.      *
  ****************************************************************
  * PROBLEM DESCRIPTION: After a database recovery performed by  *
  *                      IMS Database Recovery Facility, users   *
  *                      may receive an ABENDS0C7 from High      *
  *                      Performance Pointer Checker or an       *
  *                      ABENDU0853 from DFSPREC0.               *
  ****************************************************************
  * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
  ****************************************************************
  When change accumulation is used as input to DRF, there is a
  situation where some CA records are not applied correctly.
  This situation occurs when an image copy is completely
  restored, however the CA contains update records that will be
  used to extend the database beyond what was restored from the
  image copy.  These CA update records also contain more than one
  change elements.
  

Problem conclusion

• FRXIICA is fixed to correct a logic error which attempts to
  copy a CA update record into a database block after the IC is
  completely restored.  This error failed to determine if there
  are multiple change elements recorded with the CA record and
  failed to expand the record if it is compressed.  This fix
  addresses these issues.
  
  FRXIOCN0 is changed to initialize a new database block with
  zeros.
  
  FRXIOSM0, FRXIVCN0, and FRXIVSM0 are recompiled to pick up
  changes from FRXIICA.
  
  FRXPDSS0 is changed to correct a error in the log record count
  for reporting.
  

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:

  UK21294

Modules/Macros

•    FRXIICA  FRXIOCN0 FRXIOSM0 FRXIVCN0 FRXIVSM0
  FRXPDSS0
  

Fix information

• Fixed component name

  IMS DB RECOVERY

• Fixed component ID

  5655I4400

Applicable component levels

• R310 PSY UK21294

     UP07/01/18 P F701