Standalone EJB client fails to connect javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection? in JBoss EAP 6

Issue

• Our standalone EJB client is failing to invoke an ejb with the following exception:

23:00:32,886 ERROR [org.jboss.remoting.remote.connection] JBREM000200: Remote connection failed: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
23:00:32,899 WARN  [org.jboss.ejb.client.remoting.ConfigBasedEJBClientContextSelector] Could not register a EJB receiver for connection to localhost:4447: java.lang.RuntimeException: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
    at org.jboss.ejb.client.remoting.IoFutureHelper.get(IoFutureHelper.java:91) [jboss-ejb-client-1.0.23.Final-redhat-1.jar:1.0.23.Final-redhat-1]
    at org.jboss.ejb.client.remoting.ConnectionPool.getConnection(ConnectionPool.java:77) [jboss-ejb-client-1.0.23.Final-redhat-1.jar:1.0.23.Final-redhat-1]
        ...
Caused by: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
        ...