IBM Support

IT24205: DB2 SERVER COULD CRASH IN RARE SCENARIOS WHEN PLAN HAS STACKED UNIONS

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • In Plans where Stacked UNIONS are present and there are other
    lolepops, like NLJN, separating them in rare circumstance
    db2 instance  could crash.
    
    Possible stack:
    
    <sqldFastFormatFixedVar>
    <sqlsorti>
    <sqlsinsr>
    <sqlrsinsr>
    <sqlrisrt>
    <sqlriunn>
    <sqlriset>
    <sqlriSectInvoke>
    <sqlrr_process_fetch_request>
    <sqlrr_open>
    <sqljs_ddm_opnqry>
    <sqljsParseRdbAccessed>
    <sqljsParse>
    <sqljsSqlam>
    <sqljsDrdaAsInnerDriver>
    <sqljsDrdaAsDriver>
    <sqeAgent::RunEDU>
    <sqlzRunEDU>
    <sqloEDUEntry>
    

Local fix

  • db2set DB2_TCG_DEFAULT_OPTIONS="set multi_stream_pushdown off"
    <instance restart>
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * ALL                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to Db2 11.1 m4fp4 or later                           *
    ****************************************************************
    

Problem conclusion

  • Upgrade to Db2 11.1 m4fp4 or later
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT24205

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    B10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-02-26

  • Closed date

    2018-11-27

  • Last modified date

    2018-11-27

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

  • 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

  • RB10 PSN

       UP

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSEPGG","label":"DB2 for Linux, UNIX and Windows"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.1","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
27 November 2018