PI16079: PROCESSING OF X'47' LOG RECORD CAUSES VARIOUS ISSUES

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Items addressed via this APAR:
  1. In the case of the following conditions, DFR displayed
     "NOT FOUND" on a "UOR TIME(OFFSET)" field of a "BACKOUT
     REQUIRED PSB LIST" even if a LCHKPT=N parameter was
     specified.
     Moreover, DFR was not able to create complete UORTIME
     parameters of DBRC commands, so they appeared as X...X+XX:XX.
  
     Conditions:
     The recovery start checkpoint used by DFR was taken after a
     BMP region started and before it updated DL/I DBs.
  
  2. In the case of the following conditions, DFR displayed
     a PSB name which has not updated DL/I DBs on a "PSBNAME"
     field of the "BACKOUT REQUIRED PSB LIST" even if the
     LCHKPT=N parameter was specified.
  
     Conditions:
     The recovery start checkpoint used by DFR was taken after
     a BMP region started and after it issued a CHKP call.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All IMS DEDB FAST RECOVERY Version 2         *
  *                 Release 2 (FMID=H1J2220) users who specify   *
  *                 a LCHKPT=N parameter in a JCL under IMS V11, *
  *                 V12 or V13.                                  *
  ****************************************************************
  * PROBLEM DESCRIPTION: Various problems for the processing of  *
  *                      X'47' log record of DFR detected as the *
  *                      results of an additional code review    *
  *                      and tests.                              *
  *                      Although a LCHKPT=N parameter is        *
  *                      specified, DFR outputs the incomplete   *
  *                      backout information to the following    *
  *                      lists:                                  *
  *                      - Backout Required PSB list             *
  *                      - The DBRC commands written to          *
  *                        DBRCOUTL/DBRCOUTV/DBRCOUTN DD         *
  ****************************************************************
  * RECOMMENDATION: Apply the maintenance for this APAR.         *
  ****************************************************************
  The following problems are fixed by this APAR:
  *
  1. In the case of the following conditions, DFR displayed
     "NOT FOUND" on a "UOR TIME(OFFSET)" field of a "BACKOUT
     REQUIRED PSB LIST" even if a LCHKPT=N parameter was
     specified.
     Moreover, DFR was not able to create complete UORTIME
     parameters of DBRC commands, so they appeared as X...X+XX:XX.
  .
      Conditions:
       The recovery start checkpoint used by DFR was taken after
       a BMP region started and before it updated DL/I DBs.
  .
  2. In the case of the following conditions, DFR displayed
     a PSB name which has not updated DL/I DBs on a "PSBNAME"
     field of the "BACKOUT REQUIRED PSB LIST" even if the
     LCHKPT=N parameter was specified.
  .
      Conditions:
       The recovery start checkpoint used by DFR was taken after
       a BMP region started and after it issued a CHKP call.
  

Problem conclusion

• If a system checkpoint was taken by IMS after a BMP region
  started and before it updated DL/I DBs, a X'47' log record has
  zero CAPDBLBK.
  Even if the BMP region never issues a Full Function DL/I call,
  the X'47' log record may have non-zero CAPDBLBK that is pointed
  to a X'41' log record.
  However, DFR judges that a backout is required if only the X'47'
  log record has non-zero CAPDBLBK for a PSB, and saves a UORTIME.
  *
  The following modules have been modified.
  (x = B, C and D)
  *
  DFRLUORx - When saving a PSB name in the X'47' log record, this
             module was changed so that the UORTIME may also be
             saved.
           - This module was changed so that it might be checked
             to judge that the backout is required by the X'47'
             log record that a value of a LCHKPT parameter is
             "Y."
  *
  

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:

  UI17144

Modules/Macros

• DFRLUORB DFRLUORC DFRLUORD
  

Fix information

• Fixed component name

  DEDB FAST RECOV

• Fixed component ID

  5655E3200

Applicable component levels

• R220 PSY UI17144

     UP14/04/22 P F404

Fix is available

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