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

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 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