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IC86068: SYSTEM MODULE ROUTINE DBMS_ALERT.REGISTER MAY INCORRECTLY REMOVE ACTIVE ALERTS.

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • The system module DBMS_ALERT is used to send alerts between
    applications.
    
    Each alert must be registered with the DBMS_ALERT.REGISTER
    routine.
    If an application disconnects, then any alerts that were
    associated to that application are no longer active.
    
    During the register process, db2 will clean up any old alerts
    from previous applications that have since disconnected.
    However, if multiple alerts are registered from different
    applications concurrently with specific timing, then there is a
    logic problem that might (depending on specific timing) result
    in removing an active registered alert for an application that
    is currently connected.  This will result in the failure to
    signal or wait for the alert that was incorrectly removed.
    
    The problem is more likely to occur on (but not limited to), a
    DPF instance.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to v97 fixpack 7.                                    *
    ****************************************************************
    

Problem conclusion

  • Problem fixed in v97 fixpack 7.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC86068

  • 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

    2012-08-22

  • Closed date

    2012-10-20

  • Last modified date

    2012-10-20

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

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

    IC86092

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 #: IC86068

Modified date: 20 October 2012