PM78558: DSNJ098E ERROR OCCURS WHEN CONDITIONAL RESTART FROM THE LRSN GENERATED BY BACKUP SYSTEM DSNU1614I

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Customer has a DB2 datashring group. After backup full system,
    they tried to recover to a given point in time. But DSNJ098E
    error occurs at one member when conditionally restart using the
    complete LRSN issued by BACKUP SYSTEM DSNU1614I.
    .
    DB2 WV0A member of the group abends on startup with
    DSNJ098E  -WV0A DSNJW306 CRCR ENDLRSN OF C819689C8A3B IS HIGHER
    THAN ANY KNOWN LRSN, NO TRUNCATION WILL OCCUR
    DSNV086E -WV0A DB2 ABNORMAL TERMINATION REASON=00E80084
    .
    

Local fix

  • N.A.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All DB2 9 for z/OS and DB2 10 for z/OS       *
    *                 users who perform conditional restarts       *
    *                 with a SYSPITR value as part of a            *
    *                 procedure to restore their systems to        *
    *                 prior point in time.                         *
    ****************************************************************
    * PROBLEM DESCRIPTION: MSGDSNJ098E, MSGDSNV086E, RC00E80084    *
    *                      DB2 restart failure in data sharing     *
    *                      on a conditional restart using a        *
    *                      SYSPITR value obtained from             *
    *                      MSGDSNU1614I, issued during BACKUP      *
    *                      SYSTEM utility.                         *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
      User followed the recommendations from the DB2 Administration
    Guide under the section, "Recovering a DB2 system to a given
    point in time by using the RESTORE SYSTEM utility."
      In a data sharing system, the user ran BACKUP SYSTEM
    utility to back up both the data and log copy pools (i.e.,
    DATA ONLY was NOT specified and/or FULL was specified or
    defaulted).  MSGDSNU1614I was issued to externalize the
    "DATA COMPLETE LRSN".
      After manually restoring their log copy pools according
    to the documented recommendations, they performed a
    conditional restart specifying a SYSPITR value they
    obtained from the DATA COMPLETE LRSN reported by the BACKUP
    SYSTEM.
      When they tried to restart DB2 on all members one of
    the members failed to start and MSGDSNJ098E was issued:
    
    DSNJ098E - CRCR ENDLRSN OF xxxxxxxxxxxx IS HIGHER THAN
    ANY KNOWN LRSN, NO TRUNCATION WILL OCCUR
    DSNV086E - DB2 ABNORMAL TERMINATION REASON = 00E80084
    
      DB2 had been mistakenly externalizing a "data complete lrsn"
    value that was valid only for the member that BACKUP SYSTEM
    ran on, but not for other members in the data sharing group.
    For a member with little or no update activity, it could
    fail in this way when the procedure is followed.
    

Problem conclusion

  •   Code in BACKUP SYSTEM utility has been changed to cause a
    delay of approximately eight seconds to occur after the
    backup of the data is complete and prior to the start of
    the backup of the log copy pool.  By doing this, it reduces
    the chances that any members will not have log records which
    are greater than the value that is seen in message DSNU1614I.
      This delay is added only when BACKUP SYSTEM utility is
    run without specifying DATA ONLY, and only in a data sharing
    environment.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM78558

  • Reported component name

    DB2 OS/390 & Z/

  • Reported component ID

    5740XYR00

  • Reported release

    910

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-12-05

  • Closed date

    2013-02-19

  • Last modified date

    2013-04-02

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

    UK91810 UK91811

Modules/Macros

  •    DSNUVABK DSNUVBBD
    

Fix information

  • Fixed component name

    DB2 OS/390 & Z/

  • Fixed component ID

    5740XYR00

Applicable component levels

  • RA10 PSY UK91810

       UP13/03/06 P F303

  • R910 PSY UK91811

       UP13/03/06 P F303

Fix is available

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Document information


More support for:

DB2 for z/OS

Software version:

910

Reference #:

PM78558

Modified date:

2013-04-02

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