Comment from Scott Stark (http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3926369#3926369)

HA proxy invokers like JRMPInvokerProxyHA should not exist. The only difference between an ha proxy and regular proxy would be an interceptor that selected from the available targets and set the invocation proxy such that the common Invoker proxy was told the transport proxy to use. Even an unclustered proxy could have a recover/ha sematic like blocking until the server is availble with this configuration. HA is an aspect that should not be embedded in the transport specific proxy.