PM87437: Placement can leave duplicate shards for the same partition.

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APAR status

  • Closed as program error.

Error description

  • The xscmd commands show duplicate primaries, unexpected
    replicas, or both. The showMapSizes and revisions commands
    display this condition.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  WebSphere eXtreme Scale users running with  *
    *                  synchronous or asynchronous replica shards  *
    *                  and multimaster replication (MMR).          *
    ****************************************************************
    * PROBLEM DESCRIPTION: Extra replica shards are running. An    *
    *                      extra SynchronousReplica or             *
    *                      AsynchronousReplica is in the output    *
    *                      of xscmd commands.                      *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    During placement (events such as stopping and starting servers
    or MMR linking) replicas can be moved to new locations.
    Sometimes when a replica moves to and starts on a new container
    server, the old replica does not stop. The old replica
    continues to replicate and is displayed as an extra replica in
    xscmd output of commands such as showMapSizes or routetable.
    

Problem conclusion

  • To resolve the extra replicas, you can run the xscmd command,
    triggerPlacement. The extra replica shards will stop after the
    placement is refreshed. Apply the latest fix pack to apply
    this change. For information about downloading fix packs, see
    the following web page:
    http://www-01.ibm.com/support/docview.wss?uid=swg27018991
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM87437

  • Reported component name

    WS EXTREME SCAL

  • Reported component ID

    5724X6702

  • Reported release

    860

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-04-19

  • Closed date

    2013-06-18

  • Last modified date

    2013-06-18

  • 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 EXTREME SCAL

  • Fixed component ID

    5724X6702

Applicable component levels

  • R860 PSY

       UP



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Document information


More support for:

WebSphere eXtreme Scale

Software version:

860

Reference #:

PM87437

Modified date:

2013-06-18

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