JBoss Remoting service sometimes fails to boot when multiple remote connections are defined in EAP 6

Issue

When multiple remote connections are defined like the following:

• In <subsystem xmlns="urn:jboss:domain:remoting:1.1">:

  <outbound-connections>
    <remote-outbound-connection name="remote-ejb-connection1" outbound-socket-binding-ref="remote-ejb">
    </remote-outbound-connection>
    <remote-outbound-connection name="remote-ejb-connection2" outbound-socket-binding-ref="remote-ejb">
    </remote-outbound-connection>
  </outbound-connections>
  

• In <socket-binding-group name="standard-sockets" default-interface="public" port-offset="${jboss.socket.binding.port-offset:0}">:

  <outbound-socket-binding name="remote-ejb">
    <remote-destination host="localhost" port="4447"/>
  </outbound-socket-binding>
  

Then JBoss Remoting service sometimes fails to boot:

ERROR [org.jboss.msc.service.fail] (MSC service thread 1-5) MSC00001: Failed to start service jboss.remoting.endpoint.subsystem.outbound-connection.dummy-6: org.jboss.msc.service.StartException in service jboss.remoting.endpoint.subsystem.outbound-connection.dummy-6: Failed to start service
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1767) [jboss-msc-1.0.2.GA-redhat-1.jar:1.0.2.GA-redhat-1]
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [rt.jar:1.6.0_29]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [rt.jar:1.6.0_29]
    at java.lang.Thread.run(Thread.java:662) [rt.jar:1.6.0_29]
Caused by: org.jboss.remoting3.DuplicateRegistrationException: URI scheme 'remote://' is already registered to a provider
    at org.jboss.remoting3.EndpointImpl.addConnectionProvider(EndpointImpl.java:421)
    at org.jboss.as.remoting.RemoteOutboundConnectionService.start(RemoteOutboundConnectionService.java:89)
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.2.GA-redhat-1.jar:1.0.2.GA-redhat-1]
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.2.GA-redhat-1.jar:1.0.2.GA-redhat-1]

• EJB client hanging in Domain mode, could be related to: https://issues.jboss.org/browse/AS7-4834