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PORMI lookup works but method invocation not
 

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  1. PORMI lookup works but method invocation not
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    <h2>UPDATE:</h2> <p>The problem is, that i'm using a kind of 2-way connection.</p> <p>On client side, this works:</p> <pre><code>String a = this.lobby.getMsg(); </code></pre> <p>and this not:</p> <pre><code>this.lobby.login((Player)UnicastRemoteObject.exportObject(player, 0)); </code></pre> <p>and ideas?</p> <hr> <hr> <p>I'm working on a java application which uses RMI for network communication.</p> <p>On one computer everythings works good, but if i try to run it via the internet i ran into problems.</p> <p>It seems, that the client is able to retreive the registry from the server and to lookup the lobby-object. But if the client tries to call the login method of the lobby object via rmi, it takes very long time and i receive the following exception: </p> <p>Strange thing is, that there is the wrong ip(the client ip) mentioned in this exception. And if I run a client on the same machine as the server, it works perfectly.</p> <pre><code>java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: java.rmi.ConnectException: Connection refused to host: &lt;client ip(should be server ip?)&gt;; nested exception is: java.net.ConnectException: Die Wartezeit für die Verbindung ist abgelaufen (=time out) at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:353) at sun.rmi.transport.Transport$1.run(Transport.java:177) at sun.rmi.transport.Transport$1.run(Transport.java:174) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:173) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:553) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:808) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:667) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:722) at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:273) at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:251) at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:160) at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:194) at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:148) at $Proxy0.einloggen(Unknown Source) at Client.login(Client.java:64) </code></pre> <hr> <p><strong>Here is the relevant code:</strong></p> <p>My server class:</p> <pre><code> public static final int RMI_PORT = 55555; public static final String SERVER_IP = "xyz.com"; /** * Startet Spielserver * * @param args */ public static void main(String[] args) { System.out.println("Server starten.."); System.setProperty("java.rmi.server.hostname", SERVER_IP); try { if (System.getSecurityManager() == null) { System.setSecurityManager(new RMISecurityManager()); } Registry registry = LocateRegistry.getRegistry(SERVER_IP, RMI_PORT); Lobby lobby = new LobbyImpl(); UnicastRemoteObject.exportObject(lobby, 0); registry.bind("Lobby", lobby); } catch (RemoteException e) { e.printStackTrace(); } catch (AlreadyBoundException e) { e.printStackTrace(); } } </code></pre> <p>Client class:</p> <pre><code>public Client() { try { Registry registry = LocateRegistry.getRegistry("xyz.com", Server.RMI_PORT); lobby = (Lobby) registry.lookup("Lobby"); } catch (RemoteException e) { e.printStackTrace(); } catch (NotBoundException e) { e.printStackTrace(); } this.gui = new GUI(this); } public void login(String name) throws RemoteException { Player player = new Player(name); this.lobby.login((Player)UnicastRemoteObject.exportObject(player, 0)); } </code></pre> <p>Client startscript:</p> <pre><code>#!/bin/bash SCRIPTDIR=$(dirname $0) java -classpath $SCRIPTDIR/bin Client </code></pre> <p>Server startscript:</p> <pre><code>#!/bin/bash SCRIPTDIR=$(dirname $0) cd ${SCRIPTDIR}/bin rmiregistry 55555 &amp; cd - java -classpath $SCRIPTDIR/bin -Djava.security.policy=$SCRIPTDIR/src/server.policy -Djava.rmi.server.codebase=file:$SCRIPTDIR/bin/ Server killall rmiregistry </code></pre> <p>and last but not least my first (test) policy file:</p> <pre><code>grant { permission java.security.AllPermission; }; </code></pre> <p>what could be the problem?</p> <p>regards</p>
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    1. USGraslandpinguin
    1. USGraslandpinguin
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      1. VTUpMod
    1. COThanks for the suggestion. So i have not to catch the second exception. But concerning my problem it doesn't change something
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      1. USGraslandpinguin
    2. COAs his lookup worked, obviously the bind worked as well. Not an answer.
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      1. USuser207421
 

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