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IC78171: DB2WDOG CAN ABORT (SEGV/CRASH) WHEN CLEANING UP A DB2FMP ENTRY

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • The db2wdog process can abnormally terminate with a signal #11
    (segmentation violation) and cause the DB2 instance to
    crash when cleaning up non-SQL stored procedures.  The
    probability of this crash occurring is low.
    
    One possible side effect of this APAR is that the DB2
    instance is NOT brought down after db2wdog dies leaving the DB2
    instance in an unusable state.
    
    The trap file will contain the
    following stack:
    
    SQLO_MEM_POOL::MemTreePut.fdpr.clone.128.chunk.4() at
    0x900000008603b60
    sqlofmblkEx() at 0x900000008603890
    sqlexAuditData.@136@sqlerRemoveFmpFromTable() at
    0x900000004fba560
    .sqlerRemoveFmpFromTable() at 0x900000004fba210
    sqlerRemoveFmpFromTable() at 0x900000004fbb37c
    sqlerReturnFmpToPool.fdpr.chunk.5() at 0x900000003d7f1a4
    sqleChildCrashHandler() at 0x100009640
    sqleWatchDog() at 0x100003910
    DB2main() at 0x1000015b0
    sqloEDUMainEntry() at 0x900000008680ac8
    sqloEDUEntry.fdpr.chunk.6() at 0x900000008680a4c
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * ALL                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See ERROR DESCRIPTION.                                       *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to v9.7 Fixpack 6.                                   *
    ****************************************************************
    

Problem conclusion

  • First fixed in v9.7 Fixpack 6. At minimum this fix should be
    applied to the server side.
    

Temporary fix

  • See LOCAL FIX.
    

Comments

APAR Information

  • APAR number

    IC78171

  • 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

    2011-08-17

  • Closed date

    2012-06-11

  • Last modified date

    2012-06-11

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

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

    IC84148

Fix information

  • Fixed component name

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

  • R950 PSY

       UP

  • R970 PSY

       UP

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSEPGG","label":"DB2 for Linux, UNIX and Windows"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.7","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
11 June 2012