routees or looking up routees
on nodes in the cluster.
When a node becomes unreachable or leaves the cluster the routees of that node are
automatically unregistered from the router. When new nodes join the cluster additional
routees are added to the router, according to the configuration. Routees are also added 
when a node becomes reachable again, after having been unreachable.
</p>

<p>
You can read more about cluster aware routers in the 
<a href="http://doc.akka.io/docs/akka/2.4-SNAPSHOT/java/cluster-us