While there, I've also noticed that jboss head doesn't have
rmi-invoker
definitions in conf/standardjboss.xml, and
org.jboss.metadata.SessionMetadata / EntityMetaData for some reason
default to the rmi-invoker for clustered setups, so I suppose this has
been forgotten there?
Yes, this was an oversight on my part. I have update the clustered
proxy bindings in these files to reference the unified invokers (on HEAD
only as is already there for 4.2 branch).