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IT39051: HANG WAITING FOR SQLO_LT_SQLI_IDXCB__IDXTREELATCH WITH NO HOLDERS after failed REORG INDEX(ES) .. RECLAIM EXTENTS

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APAR status

  • Closed as program error.

Error description

  • If REORG INDEX(ES)  .. RECLAIM EXTENTS encounters an error in a
    certain timing window, it may fail without releasing the
    SQLO_LT_SQLI_IDXCB__IDXTREELATCH
    Any subsequent access to the corresponding index that needs to
    get this latch, will hang.
    
    db2stop may get error SQL6037N START or STOP DATABASE MANAGER
    timeout value was reached.
    
    The following is an example of output from db2pd-latches showing
    a number of applications waiting on
    SQLO_LT_SQLI_IDXCB__idxTreeLatch without any holders:
    Address                      Holder   Waiter       ..
    LatchType
    0x0A0002082A8E3FA0 0          156006     ..
    SQLO_LT_SQLI_IDXCB__idxTreeLatch
    0x0A0002082A8E3FA0 0          168829     ...
    SQLO_LT_SQLI_IDXCB__idxTreeLatch
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * all                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to 11.1.4.7                                          *
    ****************************************************************
    

Problem conclusion

  • Upgrade to 11.1.4.7
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT39051

  • 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

    2021-11-11

  • Closed date

    2022-04-17

  • Last modified date

    2022-04-17

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

    IT39048

  • 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

  • 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