The three clusters are different logical groups.  The Tomcat cluster grouping 
is handling session replication.  The DefaultPartition cluster handles core 
clustering including HA-JNDI.  Any TreeCache related clusters are handling 
replicated TreeCache instances.

These clusters all use JGroups internally and they are differentiated by 
cluster name, multicast address and port.  Currently separate configurations 
are required for each cluster.  The forthcoming JGroups 2.3 release will allow 
multiplexing of cluster configurations in cases where cluster groups are able 
to share configurations (e.g., JGroups stacks).

If you are running multiple partitions in a cluster, you need to distinguish 
them via the name, address and port settings.  This is true for all of the 
clusters in your topology (e.g., Tomcat, TreeCache).



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