PK52776: DATABASE CORRUPTION USING DRF 310 AFTER A PITR RECOVERY TERMINATING WITH A RC=0 ALSO LOOP

APAR status

• Closed as program error.

Error description

• Database corruption using DRF 310 after a PITR recovery
  terminating with a RC=0 is the reported symptom. During recreate
  using the same data other symptoms occured i.e. loop/hang
  conditions, storage fragmentation, and sychronization problems
  when processing large quantities of data.
  Forward fit of 210 APAR PK52222
  Additional keywords ABENDU0385  U0385 0000000A
  ABENDU385
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of DRF version 3 release one might *
  *                 be affected.                                 *
  ****************************************************************
  * PROBLEM DESCRIPTION: Undetected data corruption results      *
  *                      when an image copy with bad data is     *
  *                      used as input to recovery or log data   *
  *                      is either corrupted or overlayed        *
  *                      during DRF processing.                  *
  ****************************************************************
  * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
  ****************************************************************
  Undetected data corruption can result if the image copy RBA
  being processed is smaller than the prior image copy RBA values.
  This can happen if the image copy has been corrupted but is
  still used as input to recovery.  This can also happen if
  processing in DRF overlays the internal contents of log records
  or log data has been corrupted.'
  

Problem conclusion

• AIDS: RIDS/UTIL RIDS/DBS DBS/UTIL
    GEN:
  
  *** END IMS KEYWORDS ***
  FRXRBUF0 is modified to add the check to make sure that the log
  sequence number is in the correct range.
  FRXIVCN0 and FRXIOCN0 are modified to check the current RBA of
  Image Copy that is about to apply. If the current RBA is
  smaller than the prior image copy RBA values, abend with U385-A.
  

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:

  UK32534

Modules/Macros

• FRXIOCN0 FRXIVCN0 FRXRBUF0
  

Fix information

• Fixed component name

  IMS DB RECOVERY

• Fixed component ID

  5655I4400

Applicable component levels

• R310 PSY UK32534

     UP07/12/22 P F712