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IT31101: INSTANCE TRAPPED DURING SNAPSHOT MONITORING IN FUNCTION SQLPGETDBMONLOG()

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APAR status

  • Closed as program error.

Error description

  • When taking database snapshot, there is a small timing condition
    that can cause the instance to trap.  A sample stack dump of the
    trap is shown below:
    
    sqlpGetDbMonLog(sqeLocalDatabase*, sql_static_data*,
    SQLP_DBMON_LOG_INFO*)
    sqlmindb(sqm_agent_entity*, sqeLocalDatabase*, char const*,
    unsigned int, sqlm_dbase*, sqm_snapshot_buffer*,
    sqlm_bp_int_info const&, unsigned long, unsigned long, unsigned
    long, sqlm_header_info*)
    sqm_snap_dbase(sqm_agent_entity*, sqlo_gmt const&,
    sqeLocalDatabase*, char const*, unsigned int,
    sqm_snapshot_buffer*, sqlm_dbase**, sqlm_header_info*)
    sqlmonssagnt(unsigned int, sqm_entity_id, sqlmai*, unsigned int,
    void*, sqlm_collected*, unsigned short, unsigned short, sqlca*)
    sqlmPdbRequestRouter(sqeAgent*)
    sqleSubRequestRouter(sqeAgent*, unsigned int*, unsigned long*)
    sqleProcessSubRequest(sqeAgent*)
    sqeAgent::RunEDU()
    sqzEDUObj::EDUDriver()
    sqlzRunEDU(char*, unsigned int)
    sqloEDUEntry
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * AIX/LINUX                                                    *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to DB2 v11.1.4.6                                     *
    ****************************************************************
    

Problem conclusion

  • We need to cache some variables here and use cached values
    throughout function to avoid anything changing underneath us.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT31101

  • 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

    2019-11-28

  • Closed date

    2021-03-18

  • Last modified date

    2021-03-18

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

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

    IT36285

Fix information

  • Fixed component name

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

  • RB10 PSY

       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