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JR50582: RE-INTEGRATION OF OLD PRIMARY AS STANDBY HANGS AFTER FORCE TAKEOVER

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APAR status

  • Closed as program error.

Error description

  • When we have hundreds of  connections attempting to
    connect to the Primary database, the very first one will
    bring the database up and attempt to start the database
    as primary;  this very first connection will pay the cost
    (up to hadr_timeout) trying to find the standby on the
    other side.   If it is not able to find the standby, the first
    connection will fail with -1768 and bring down the database.
    The problem here is that the very next connection attempt
    will execute the FirstConnect code path again, suffer this
    hadr_timeout before getting the same -1768 eventually.
    Moreover, even if the customer realizes that the primary is
    really an old P and try to issue a start hadr as standby,
    this start as standby connection will have to compete with
    the other connect attempts to the database; meaning it
    could be hours before the command is executed or
    it might never get a chance to come in.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Anyone using HADR                                            *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to the latest fix pack.                              *
    ****************************************************************
    

Problem conclusion

  • Problem was first fixed in DB2 UDB Version 10.1 fix pack 5
    

Temporary fix

Comments

APAR Information

  • APAR number

    JR50582

  • Reported component name

    WS FS DOCUMENTA

  • Reported component ID

    5724N9718

  • Reported release

    A10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2014-06-20

  • Closed date

    2015-07-16

  • Last modified date

    2015-07-16

  • 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

    WS FS DOCUMENTA

  • Fixed component ID

    5724N9718

Applicable component levels

  • RA10 PSN

       UP

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSCAVPX","label":"Federated Server"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"A10","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
16 July 2015