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IT06791: DB2LOGMGR MAY GET INTO A SELF DEADLATCH SITUATION CAUSING A HANG

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • DB2 is pruning backups and log files at the end of a backup and
    a simultaneous request to archive or retrieve a log file comes
    in.
    If for example something went wrong inside TSM and a signal
    gets raised, it causes DB2 to not free the sessionCount latch
    and hanging the instance.
    
    You will see the following for db2logmgr:
    
    <LatchInformation>
    Waiting on latch type: (SQLO_LT_sqluvend_C__sessionCountLatch) -
    Address: (000000001347B008), Line: 277, File: sqluvend.C
    
    Holding latch type: (SQLO_LT_sqluvend_C__sessionCountLatch) -
    Address: (000000001347B008), Line: 277, File: sqluvend.C
    HoldCount: 1
    </LatchInformation>
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * ALL                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to DB2 Version 9.7 and Fix Pack 11                   *
    ****************************************************************
    

Problem conclusion

  • Problem was first fixed in DB2 Version 9.7 and Fix Pack 11
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT06791

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    970

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-01-28

  • Closed date

    2015-10-09

  • Last modified date

    2015-10-09

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

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

    IT06792 IT06793 IT06924

Fix information

  • Fixed component name

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

  • R970 PSN

       UP



Document information

More support for: DB2 for Linux, UNIX and Windows

Software version: 9.7

Reference #: IT06791

Modified date: 09 October 2015