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IT14899: SETTING THE FEDERATED SERVER OPTION DB2_REQUESTS_IO_BLOCK_BUF TOA HIGH VALUE CAN LEAD TO INCORRECT RESULTS BEING RETURNED

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Abstract line is too short, so the full abstract is:
    
    SETTING THE FEDERATED SERVER OPTION DB2_REQUESTS_IO_BLOCK_BUF TO
    A HIGH VALUE CAN LEAD TO INCORRECT RESULTS BEING RETURNED BY A
    SELECT WHICH RETURNS A LOT OF NARROW ROWS FROM A NICKNAME.
    
    Error description:
    
    This problem can happen because the DB2_REQUESTS_IO_BLOCK_BUF
    enlarges the buffer used to retrieve data from the remote data
    source, but if 1 buffer contains more than 32k rows, an overflow
    of a variable can lead to this problem.
    

Local fix

  • The workaround is to lower the DB2_REQUESTS_IO_BLOCK_BUF setting
    ( or leave as default ).
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * ALL                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to DB2 10.1 Fix Pack 6                               *
    ****************************************************************
    

Problem conclusion

  • First fixed in DB2 10.1 Fix Pack 6
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT14899

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    A10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-04-21

  • Closed date

    2017-03-02

  • Last modified date

    2017-03-02

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

    IT14685

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

Fix information

  • Fixed component name

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

  • RA10 PSN UP

       FIX

[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSEPGG","label":"Db2 for Linux, UNIX and Windows"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"10.1","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
02 March 2017