Cassandra に nodetool を実行すると Connection refused

薫 $ ./bin/nodetool --host u0.local ring
Error connection to remote JMX agent!
java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is:
	java.net.ConnectException: Connection refused
	at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
	at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
	at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202)
	at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:128)
	at javax.management.remote.rmi.RMIServerImpl_Stub.newClient(Unknown Source)
	at javax.management.remote.rmi.RMIConnector.getConnection(RMIConnector.java:2343)
	at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:296)
	at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:267)
	at org.apache.cassandra.tools.NodeProbe.connect(NodeProbe.java:142)
	at org.apache.cassandra.tools.NodeProbe.<init>(NodeProbe.java:112)
	at org.apache.cassandra.tools.NodeCmd.main(NodeCmd.java:655)
	Caused by: java.net.ConnectException: Connection refused
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:327)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:193)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:384)
	at java.net.Socket.connect(Socket.java:546)
	at java.net.Socket.connect(Socket.java:495)
	at java.net.Socket.<init>(Socket.java:392)
	at java.net.Socket.<init>(Socket.java:206)
	at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
	at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:146)
	at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
	... 10 more
[2]    32248 exit 3     ./bin/nodetool --host u0.local ring