Deployed JavaEE 5.9.8 agent with JBoss Enterprise Application Platform (EAP) 6.4 bundling with JBoss AS 7.5.0.
When starting up as standalone instance, JBoss server.log reported "FATAL Failed to determine Application Server type" in server.log
[Excerpt from server.log]
INFO unknown Agent shutdown completed
[setting in standalone.sh]
Issue resolved after removing invalid -D parameter. Agent is able to connect to Nexus host:41705 port as seen in the server.log