RMI/Unmarshaling exception

Question

Hi,
I tried to run numerous RMI examples off the web, but i still get the same exceptions thrown each time.
I tried running it on WinXP and a 98 m/c but of no avail.
Any help would be appreciated.
Thanks.
For testing purposes I kept all the .java files and java.policy files in the same directory.
After compiling all the .java files [included at the end of this post], i ran
rmic myRMIImpl
rmiregistryand then i tried to run the server but then i get the exception shown below
=========================================
C:\rmi3>java -Djava.rmi.server.codebase=c:\rmi3\ -Djava.rmi.server.hostname=127.
0.0.1 -Djava.security.policy=c:\rmi2\java.policy myRMIServer
Exception occurred: java.rmi.ServerException: RemoteException occurred in server
thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested excep
tion is:
java.net.MalformedURLException: unknown protocol: c
java.rmi.ServerException: RemoteException occurred in server thread; nested exce
ption is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested excep
tion is:
java.net.MalformedURLException: unknown protocol: c
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.net.MalformedURLException: unknown protocol: c
java.net.MalformedURLException: unknown protocol: c
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknow
n 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 java.rmi.Naming.bind(Unknown Source)
at myRMIImpl.<init>(myRMIImpl.java:11)
at myRMIServer.main(myRMIServer.java:11)
=========================================
rmic myRMIImpl
rmiregistry
=========================================
public interface myRMIInterface extends java.rmi.Remote
public java.util.Date getDate() throws java.rmi.RemoteException;
=========================================
import java.rmi.*;
import java.rmi.server.UnicastRemoteObject;
public class myRMIImpl extends UnicastRemoteObject implements myRMIInterface
public myRMIImpl(String name) throws RemoteException
super();
try
Naming.bind(name, this);
catch(Exception e)
System.out.println("Exception occurred: " + e);
public java.util.Date getDate()
return new java.util.Date();
=======================================
import java.rmi.*;
import java.rmi.server.UnicastRemoteObject;
public class myRMIServer
public static void main(String[] argv)
System.setSecurityManager(new RMISecurityManager());
try
myRMIImpl implementation = new myRMIImpl("myRMIImpl instance");
catch (Exception e)
System.out.println("Exception occurred: " + e);
=======================================
import java.rmi.*;
import java.rmi.registry.*;
import java.rmi.server.*;
import java.util.Date;
public class myRMIClient
public static void main(String[] argv)
System.setSecurityManager(new RMISecurityManager());
if (argv.length != 1)
System.out.println("usage: java myRMIClient <IP address of host running RMI server>");
System.exit(0);
String serverName = argv[0];
try
//bind server object to object in client
myRMIInterface myServerObject = (myRMIInterface) Naming.lookup("rmi://"+serverName+"/myRMIImpl instance");
//invoke method on server object
Date d = myServerObject.getDate();
System.out.println("Date on server is " + d);
catch(Exception e)
System.out.println("Exception occured: " + e);
System.exit(0);
System.out.println("RMI connection successful");

Answer 1

Looks like if is trying to understand you URL given as the codebase and failing to do so. You specify the protocol to be used to retrieve the URL in the beginning of the URL string. For a http protocol is is http://URL, for rmi it is rmi://URL and in this case im not sure how a file URL should be written but it should be something like file://URL. Check this site for correct syntax or somewhere on the net. Anyway after you get if right, you should try it with something like
"-Djava.rmi.server.codebase=file://c:\rmi3\"
or something in those lines. That is what the exception is about anyways.
-teka