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JR32750: DB2 INSTANCE MIGHT CRASH WHEN EXECUTING A CERTAIN SQL QUERY IN AN SMP ENVIRONMENT

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • DB2 instance might crash with SEGV when executing a certain SQL
    query. The crash only occurs in an SMP enabled environment and
    the stack traces should be similar to the following:
    
    sqldAdjustSeqDetPFAmount
    sqlriNljnAdjustPfAmount
    sqlriNljnNonPiped
    sqlriSectInvoke
    ....
    

Local fix

  • Turn off SMP by setting DBM configuration parameter
    INTRA_PARALLEL to OFF
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * The crash only occurs in an SMP enabled environment and the  *
    * stack traces of the trapped process should be similar to the *
    * following:                                                   *
    * sqldAdjustSeqDetPFAmount                                     *
    * sqlriNljnAdjustPfAmount                                      *
    * sqlriNljnNonPiped                                            *
    * sqlriSectInvoke                                              *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * DB2 instance might crash with signal SEGV when executing a   *
    * certain SQL query in a SMP enabled environment. The crash    *
    * only occurs in an SMP enabled environment and the stack      *
    * traces of the trapped process should be similar to the       *
    * following:                                                   *
    * sqldAdjustSeqDetPFAmount                                     *
    * sqlriNljnAdjustPfAmount                                      *
    * sqlriNljnNonPiped                                            *
    * sqlriSectInvoke                                              *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * The workaround is to turn off SMP by setting DBM             *
    * configuration parameter INTRA_PARALLEL to OFF                *
    ****************************************************************
    

Problem conclusion

  • Problem was first fixed in Version V9.1 Fix Pack 8
    

Temporary fix

  • turn off SMP by setting DBM configuration parameter
    INTRA_PARALLEL to OFF
    

Comments

APAR Information

  • APAR number

    JR32750

  • Reported component name

    DB2 UDB ESE WIN

  • Reported component ID

    5765F4101

  • Reported release

    910

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2009-04-20

  • Closed date

    2009-10-12

  • Last modified date

    2009-10-12

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

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

    JR33261 JR33262 JR33263 JR33264 IC63659 IC63660 IC63661 IC63662
    IC63670 IC63674

Fix information

  • Fixed component name

    DB2 UDB ESE WIN

  • Fixed component ID

    5765F4101

Applicable component levels

  • R910 PSN

       UP

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Document Information

Modified date:
12 October 2009