RMI Registry connecting to wrong address

I am trying to run a simple rmi application. However I've run into unexplainable (to me) error.

I have my object CheckerImplementation that implements remote interface Checker. I am trying to set it up with this code [Instance() returns an object of CheckerImplementation type]:

            try 
            {
                Checker stub = (Checker) UnicastRemoteObject.exportObject(Instance(), 0);

                // Bind the remote object's stub in the registry
                Registry registry = LocateRegistry.getRegistry();
                registry.bind("Checker", stub);

                System.err.println("Server ready");
            } 
            catch (Exception e) 
            {
                System.err.println("Server exception: " + e.toString());
                e.printStackTrace();
            }

When run, i get the following exception:

java.rmi.ConnectException: Connection refused to host: 10.105.124.34; nested exception is: 
java.net.ConnectException: Connection refused: connect
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:601)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:198)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:184)
at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:322)
at sun.rmi.registry.RegistryImpl_Stub.bind(Unknown Source)
at Checker.CheckerImplementation.main(CheckerImplementa开发者_如何学Pythontion.java:172)
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:529)
at java.net.Socket.connect(Socket.java:478)
at java.net.Socket.<init>(Socket.java:375)
at java.net.Socket.<init>(Socket.java:189)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:22)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:128)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:595)
... 5 more

Why is Java trying to connect to 10.105.124.34 anyway? That is not localhost. What could be the raeason and how can this be fixed?

After doing some experimentation i figured out that 10.105.124.34 is indeed my IP adress. But the question remains: why not 127.0.0.1?

Are you sure 10.105.124.34 isn't your local IP? Run ifconfig/ipconfig. This is the code responsible for choosing this address (java.rmi.registry.LocateRegistry#getRegistry):

if (port <= 0)
    port = Registry.REGISTRY_PORT;

if (host == null || host.length() == 0) {
    // If host is blank (as returned by "file:" URL in 1.0.2 used in
    // java.rmi.Naming), try to convert to real local host name so
    // that the RegistryImpl's checkAccess will not fail.
    try {
       host = java.net.InetAddress.getLocalHost().getHostAddress();
    } catch (Exception e) {
       // If that failed, at least try "" (localhost) anyway...
       host = "";
    }

To wrap it up: you need RMI registry (server) running locally on your computer. Apparently you are trying to connect to it (port 1099) but none is running.

Well, you can be pretty certain that it's throwing that exception because it's trying to connect to 10.105.124.34 for some reason, and it's not working.

Here's a suggestion: what's the IP address on the machine on which you're running this? 10.105.124.34 is in the old BBN class A network that everyone uses as an anonymous inside-the-NAT network nowadays, so I'm betting that's what your router is assigning your machine via DHCP. (Hint: ifconfig on UNIX, ipconfig on Windows.)

If so, are you actually running the RMI service? What would be answering the call when you bind?

Start -> cmd -> rmiregistry , close 2 cmd windows. Run your server code again.