JMXConnectorFactory.connect 的时候出现异常，在网上找了很久，完全没有任何思路。有谁知道怎么解决吗？或者提供一下思路，Thanks in advance.
java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.ServiceUnavailableException [Root exception is java.rmi.ConnectException: Connection refused to host: localhost; nested exception is: java.net.ConnectException: Connection refused (Connection refused)] at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:369) at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:270) at *** internal code *** at *** internal code *** Caused by: javax.naming.ServiceUnavailableException [Root exception is java.rmi.ConnectException: Connection refused to host: localhost; nested exception is: java.net.ConnectException: Connection refused (Connection refused)] at com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:136) at com.sun.jndi.toolkit.url.GenericURLContext.lookup(GenericURLContext.java:205) at javax.naming.InitialContext.lookup(InitialContext.java:417) at javax.management.remote.rmi.RMIConnector.findRMIServerJNDI(RMIConnector.java:1955) at javax.management.remote.rmi.RMIConnector.findRMIServer(RMIConnector.java:1922) at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:287) ... 3 more Caused by: java.rmi.ConnectException: Connection refused to host: localhost; nested exception is: java.net.ConnectException: Connection refused (Connection refused) at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:623) 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.newCall(UnicastRef.java:342) at sun.rmi.registry.RegistryImpl_Stub.lookup(RegistryImpl_Stub.java:116) at com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.jav:132) ... 8 more Caused by: java.net.ConnectException: Connection refused (Connection refused) at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:476) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:218) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:200) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:394) at java.net.Socket.connect(Socket.java:606) at java.net.Socket.connect(Socket.java:555) at java.net.Socket.<init>(Socket.java:451) at java.net.Socket.<init>(Socket.java:228) at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40) at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:148) at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:617) ... 13 more Create MBeanServerConnection error! 
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