I just started to learn RMI and i am sure i do something wrong so got these exceptions. If anyone can help me i would be grateful. PS: I am using an RMI plug-in in Eclipse.
Here is my "Remote interface":
package org.kovachki.simplermi.common;
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface MyRemote extends Remote {
public String sayHello() throws RemoteException;
}
My Server:
package org.kovachki.simplermi.server;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.rmi.server.UnicastRemoteObject;
import org.kovachki.simplermi.common.MyRemote;
public class MyRemoteServerImpl extends UnicastRemoteObject implements MyRemote {
private static final long serialVersionUID = -1382837931101952593L;
protected MyRemoteServerImpl() throws RemoteException {
super();
// TODO Auto-generated constructor stub
}
@Override
public String sayHello() throws RemoteException{
return "Server says Hey!";
}
public static void main(String[] args) {
try
{
MyRemote service= new MyRemoteServerImpl();
Registry registry= LocateRegistry.getRegistry("localhost");
registry.bind("myserver", service);
System.out.println("The server is ready for greetings!");
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
And my client class:
package org.kovachki.simplermi.client;
import java.rmi.Naming;
import java.rmi.RMISecurityManager;
import org.kovachki.simplermi.common.MyRemote;
public class MyRemoteClient {
public static void main(String[] args) {
// TODO Auto-generated method stub
new MyRemoteClient().go();
}
@SuppressWarnings("deprecation")
public void go()
{
try
{
System.setSecurityManager(new RMISecurityManager());
MyRemote service= (MyRemote) Naming.lookup("rmi://localhost/myserver");
String s=service.sayHello();
System.out.println(s);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
Exception when i run the Server class:
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: org.kovachki.simplermi.server.MyRemoteServerImpl_Stub
at sun.rmi.server.UnicastServerRef.oldDispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$254(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler$$Lambda$1/1531681105.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknown Source)
at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
at sun.rmi.server.UnicastRef.invoke(Unknown Source)
at sun.rmi.registry.RegistryImpl_Stub.bind(Unknown Source)
at org.kovachki.simplermi.server.MyRemoteServerImpl.main(MyRemoteServerImpl.java:34)
Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: org.kovachki.simplermi.server.MyRemoteServerImpl_Stub
at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.oldDispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$254(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler$$Lambda$1/1531681105.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.kovachki.simplermi.server.MyRemoteServerImpl_Stub
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.rmi.server.LoaderHandler$Loader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at sun.rmi.server.LoaderHandler.loadClassForName(Unknown Source)
at sun.rmi.server.LoaderHandler.loadClass(Unknown Source)
at sun.rmi.server.LoaderHandler.loadClass(Unknown Source)
at java.rmi.server.RMIClassLoader$2.loadClass(Unknown Source)
at java.rmi.server.RMIClassLoader.loadClass(Unknown Source)
at sun.rmi.server.MarshalInputStream.resolveClass(Unknown Source)
at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
... 16 more
