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IC71734: IN RARE TIMING SCENARIOS, CLI-LOAD IN DPF MAY CAUSE TRAP WITH INFINITE RECURSION SYMPTOM.

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APAR status

  • Closed as program error.

Error description

  • When a CLI-Load is invoked in a DPF environment, in rare timing
    scenarios a trap is possible.
    
    The symptom will show either a 'db2lpart' or 'db2lmr' EDU with
    infinite recursion in it's StackTrace with repeated entries from
    
    sqluCSerializableSocketTagged::iNext() and
    sqluCSerializableSocketTagged::iOpen(), like so:
    
    <StackTrace>
    -------Frame------ ------Function + Offset------
    0x090000000C790640 iOpen__29sqluCSerializableSocketTaggedFiUiT1
    + 0x44
    0x090000000C790498 iNext__29sqluCSerializableSocketTaggedFiT1 +
    0x544
    0x090000000C790A40 iOpen__29sqluCSerializableSocketTaggedFiUiT1
    + 0x444
    0x090000000C78DC64 iNext__23sqluCSerializableSocketFiT1 + 0x130
    0x090000000C790498 iNext__29sqluCSerializableSocketTaggedFiT1 +
    0x544
    ........... <thousands of entries like this> .............
    0x090000000C78DC64 iNext__23sqluCSerializableSocketFiT1 + 0x130
    0x090000000C790498 iNext__29sqluCSerializableSocketTaggedFiT1 +
    0x544
    0x090000000C790A40 iOpen__29sqluCSerializableSocketTaggedFiUiT1
    + 0x444
    0x090000000C78DC64 iNext__23sqluCSerializableSocketFiT1 + 0x130
    0x090000000C790498 iNext__29sqluCSerializableSocketTaggedFiT1 +
    0x544
    0x090000000C790798 iOpen__29sqluCSerializableSocketTaggedFiUiT1
    + 0x19C
    
    NOTE: The term "CLI-Load" refers to a CLI application that
    invokes INSERT with the SQL_ATTR_USE_LOAD_API functionality, not
    a CLI application that invokes the db2Load APIs to process a
    data file.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Users with CLI-Load in DPF (rare timing scenarios).          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * Without this APAR, customer is exposed to the issue as       *
    * described in the "ERROR DESCRIPTION" section.                *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to DB2 Version 9.7, Fixpack 4.                       *
    ****************************************************************
    

Problem conclusion

  • First fixed in DB2 Version 9.7, Fixpack 4.
    

Temporary fix

  • n/a
    

Comments

APAR Information

  • APAR number

    IC71734

  • 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

    2010-10-06

  • Closed date

    2011-05-05

  • Last modified date

    2011-05-05

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

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

    IC79748

Fix information

  • Fixed component name

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

  • R970 PSY

       UP



Document information

More support for: DB2 for Linux, UNIX and Windows

Software version: 9.7

Reference #: IC71734

Modified date: 05 May 2011