As mentioned by others in the thread, there exists no out-of-the-box mechanism to make an RA instance in a cluster as the active one. This could be achieved either using Shoal or the RA could use custom group management frameworks [like JGroups/JXTA] to co-ordinate the active and failover candidate RA instances in a cluster.
Thanks
--Siva.
http://blogs.sun.com/sivakumart
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