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PI44676: ROLLBACK OF AN INSERT INTO AN ACCELERATOR-ONLY TABLE (AOT) FAILS IN DDF WITH REASON CODE=74520442

A fix is available

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APAR status

  • Closed as program error.

Error description

  • DB2IDAA defect pi44676 dpi44676 178509 d178509
    Rollback of an insert into an accelerator-only table (AOT)
    fails in DDF with reason code=74520442.
    
    Abend 00D300FD DSNLXREL+0ACC may also be seen when using IDAA
    and abort processing for the thread is occuring and the
    connection is already gone
    
    
    
    **************************************************************
    Additional Symptoms and Keywords:
     IDAA IDAAV4R1/K
     IFCID0002 Q8STRBKC
     SQLCODE -30040 SQLCODE30040 SQL30040N
      REASON 00000301 RC00000301 00001409 PRODUCT ID AQTnnnnn
    00D300FD RC00D300FD DSNLXREL OFFSET0ACC
    

Local fix

  • n/a
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All DB2 users of the IBM Data Analytics      *
    *                 Accelerator (IDAA).                          *
    ****************************************************************
    * PROBLEM DESCRIPTION: Accounting trace field Q8STRBKC         *
    *                      (IFCID0002 accumulated number of        *
    *                      ROLLBACK statements sent to IDAA from   *
    *                      DB2) is not incremented after ROLLBACK  *
    *                      of DDL and DML operations on            *
    *                      accelerator-only tables.  Subsequent    *
    *                      offloaded statements receive SQLCODE    *
    *                      -30040 REASON 00000301 RESOURCE         *
    *                      00001409 PRODUCT ID AQTnnnnn.           *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    A remote application connects to a DB2 for z/OS server and
    issues DDL or DML statements for an accelerator-only table.  The
    DDL or DML statements are offloaded to IDAA.  After the
    statements completed, the application issued a ROLLBACK.  DB2
    accounting trace information (IFCID0002) showed the Q8STRBKC
    field (accumulated number of ROLLBACK statements sent to IDAA
    from DB2) was not incremented during ROLLBACK.  Furthermore,
    subsequent DML or DDL offloads receive SQLCODE -30040.
    During ROLLBACK processing, DB2 did not forward the ROLLBACK
    request to IDAA, resulting in an inaccurate Q8STRBKC field.
    Since IDAA did not receive the ROLLBACK request, IDAA did not
    complete clean up of its resources.  This resulted in SQLCODE
    -30040 during subequent offloads.
    

Problem conclusion

  • DB2 has been changed to forward ROLLBACK requests to IDAA
    when the ROLLBACK follows DDL and DML for accelerator-only
    tables.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI44676

  • Reported component name

    DB2 OS/390 & Z/

  • Reported component ID

    5740XYR00

  • Reported release

    A10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-07-09

  • Closed date

    2015-09-04

  • Last modified date

    2015-12-10

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

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

    UI30876 UI30877

Modules/Macros

  •    DSNLBABR DSNLXCM2 DSNLXREL
    

Fix information

  • Fixed component name

    DB2 OS/390 & Z/

  • Fixed component ID

    5740XYR00

Applicable component levels

  • RA10 PSY UI30876

       UP15/09/19 P F509

  • RB10 PSY UI30877

       UP15/09/19 P F509

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.



Document information

More support for: DB2 for z/OS

Software version: A10

Reference #: PI44676

Modified date: 10 December 2015


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