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IT35517: DB2 MAY CRASH INTERMITTENTLY IN SQLRA_SQLW_MEM_FREESPACE

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Under rare conditions, a variation's sibling can be reused by
    another thread by mistake before it is set for READY_FOR_USE,
    the thread which reuses the unstable variation's sibling may run
    into a crash/trap, the trap stack is similar to below:
    
     sqlra_sqlW_mem_freespace__FP8sqlrr_cbUlPUli + 0x4E8
     sqlra_sqlW_check_for_cleanup__FP8sqlrr_cbUlP7OSSTick + 0x25C
    
    sqlra_sqlW_get_dynamic_section_new__FP8sqlrr_cbP16sqlra_cached_v
    ar + 0x16F8
    
    sqlra_load_var__FP8sqlrr_cbP16sqlra_cached_varP14SQLP_LOCK_INFOP
    b + 0xAC
     sqlra_get_var__FP8sqlrr_cbiT2bPbT5 + 0xBF8
     sqlrr_prepare__FP14db2UCinterfaceP16db2UCprepareInfo + 0x190
    
    sqljsParseRdbAccessed__FP13sqljsDrdaAsCbP13sqljDDMObjectP14db2UC
    interface + 0x84F4
     @72@sqljsSqlam__FP14db2UCinterfaceP8sqeAgentb + 0x1144
     @72@sqljsSqlam__FP14db2UCinterfaceP8sqeAgentb + 0x1144
     @72@sqljsSqlam__FP14db2UCinterfaceP8sqeAgentb + 0x161C
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All users.                                                   *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to Db2  v11.1.4.7 or later versions.                 *
    ****************************************************************
    

Problem conclusion

  • The problem is first fixed on Db2 v11.1.4.7.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT35517

  • 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

    2021-01-13

  • Closed date

    2022-04-17

  • Last modified date

    2022-04-17

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

    IT35485

  • 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 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