PM72660: DO NOT ACQUIRE TURBO DRAIN LOCK FOR NON-BLOCK PARTITION LEVEL DRAIN.

A fix is available

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Abend04E RC=00C90101 at DSNIOST2:50CB due to a turbo drain
    problem.
    
    Additional Symptoms RC00C900BA TYPE 2008
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: DB2 users using partitioned page sets        *
    ****************************************************************
    * PROBLEM DESCRIPTION: Corrupted data, resulting in any of     *
    *                      the following symptoms:                 *
    *                        - Incorrect output, INCORROUT.        *
    *                        - ABEND04E RC00C90101, RC00C90102,    *
    *                          RC00C90105, or RC00C902xx in        *
    *                          various CSECTs.                     *
    *                        - Data/index inconsistencies reported *
    *                          by the CHECK INDEX utility.         *
    *                        - Page regression reported by the     *
    *                          DSN1LOGP utility.                   *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Turbo drain logic acquires a write drain lock of part 0 in
    share mode for a partition level drain, either blocked
    or non-blocked. The drain lock is released during
    de-drain. Since non-block partition level drain does
    not acquire partition level drain locks and not set the
    drain-in-control bit, no de-drain is needed and
    the drain lock of part 0 is not released. The following
    write drain requests may not acquire the drain lock of
    part 0 in update mode since the drain lock has been held.
    As a result, other jobs can acquire write claims, make
    updates, and cause data corruption.
    

Problem conclusion

  • The turbo drain logic has been modified to not acquire drain
    locks for part 0 if this is a non-block drain request.
    

Temporary fix

  • *********
    * HIPER *
    *********
    

Comments

APAR Information

  • APAR number

    PM72660

  • Reported component name

    DB2 OS/390 & Z/

  • Reported component ID

    5740XYR00

  • Reported release

    A10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-09-11

  • Closed date

    2012-11-14

  • Last modified date

    2013-02-18

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

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

    UK83726

Modules/Macros

  •    DSNB1DRA
    

Fix information

  • Fixed component name

    DB2 OS/390 & Z/

  • Fixed component ID

    5740XYR00

Applicable component levels

  • RA10 PSY UK83726

       UP12/12/11 P F212

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.



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Document information


More support for:

DB2 for z/OS

Software version:

A10

Reference #:

PM72660

Modified date:

2013-02-18

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