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IT32897: POSSIBLE TRAP (SEGV) OR MEMORY ERROR IN SQLVFREELOBMEM() IF QUERYING A TABLE FUNCTION RETURNING A ROWTYPE WITH A CLOB IN IT

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • The condition is that the CLOB in the row returned by the
    pipelined table function contains alternatively
    NULL and non NULL CLOB data. This can lead to either a SEGV
    (Trap) or to some memory 'corrupted block header'
    failures.
    
    Typical top of the stack would be:
    
    0x090000000AE6C128 sqloCrashOnCriticalMemoryValidationFailure +
    0x48
    0x090000000AED7070
    diagnoseMemoryCorruptionAndCrash__13SQLO_MEM_POOLFUlCPCcCb +
    0x4F0
    0x090000000AE6DF58
    IPRA.$sqloDiagnoseFreeBlockFailure__FP8SMemFBlkCb + 0x758
    0x090000000AE6C69C sqlofmblkEx + 0x11C
    0x090000000D449B24 sqlvFreeLobMem__FP9sqllf_cso@AF14_5 + 0x24
    0x090000000D44A688
    sqlriRowDescCopy__FP8sqlrr_cbP18sqlriRowDescriptorT2 + 0x208
    0x090000000D447840 sqlvSqlPLCopyRow__FP8sqlrr_cbP10sqlz_valueT2
    + 0x40
    0x090000000F634E64 copyData__3PVMFP10sqlz_valueT1Ulb + 0x3E4
    0x090000000F62A39C copyVariable__3PVMFUiT1 + 0xDC
    0x090000000F627E48 run__3PVMFv + 0x1348
    0x090000000F61375C pvm_entry + 0x45C
    0x090000000AE32A8C sqloInvokeFnArgs + 0x5D6C
    0x090000000E7E0558
    IPRA.$sqlriInvokerTrusted__FP10sqlri_ufobP21sqlriRoutineErrorInt
    fb + 0x2AF8
    0x090000000E7D62A8 sqlriInvokeInvoker__FP10sqlri_ufobb + 0x2008
    0x0900000011E24E44 sqlri_tfftc__FP8sqlrr_cbP9sqlri_tao + 0x324
    0x090000000DAF42BC sqlriFetch__FP8sqlrr_cbP9sqlri_taol + 0x21C
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Rowstore                                                     *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to Db2 V11.1.4.6 or higher                           *
    ****************************************************************
    

Problem conclusion

  • Upgrade to Db2 V11.1.4.6 or higher
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT32897

  • 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

    2020-05-18

  • Closed date

    2021-03-26

  • Last modified date

    2021-03-26

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

  • 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