IBM Support

IT33865: HIGH CPU USAGE WHEN DB2_ALTERNATE_GROUP_LOOKUP REGISTRY VARIABLEAND OS GROUP NAMES DOES NOT MATCH DB2 NAMING RULES

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Group lookup may encounter an infinite loop when
    DB2_ALTERNATE_GROUP_LOOKUP registry variable is set to
    GETUSERATTR and the OS returns group names that do not match Db2
    naming rules.
    
    May result in authentication or statements appearing to hang
    with high CPU usage.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * ALL                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to Db2 11.1 Mod 4 Fix Pack 6                         *
    ****************************************************************
    

Problem conclusion

  • First fixed on Db2 11.1 Mod 4 Fix Pack 6
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT33865

  • 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

    2020-08-11

  • Closed date

    2021-03-26

  • Last modified date

    2021-03-26

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

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

    IT34107

Fix information

  • Fixed component name

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

  • RB10 PSN

       UP

  • RB50 PSN

       UP

[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSEPGG","label":"DB2 for Linux- UNIX and Windows"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.1","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
04 May 2022