RMI Unmarshalling error

Please refer to
http://forum.java.sun.com/thread.jsp?forum=58&thread=510804&tstart=0&trange=100
Cheers ... Gregg.

Hi ,
Le' me give u some hints ................
@ Check the java.policy file for the permissions and make the changes.........where u need to add permissions....
permission java.net.SocketPermission "<hostname>:<portno>-", "listen, connect, accept, resolve";
and few more things.
@ An UnmarshalException can be thrown while unmarshalling the parameters or results of a remote method call if any of the following conditions occur: if an exception occurs while unmarshalling the call header if the protocol for the return value is invalid if a java.io.IOException occurs unmarshalling parameters (on the server side) or the return value (on the client side).
Did this solve ur problem.
Rave.

Similar Messages

New @ RMI need help with java.rmi.UnmarshalException: error unmarshalling

Hi @ all out there,
I'm new with Java RMI and have to write a EventSystem for an college project where clients can subscribe to a topic and get notified when someone publishes a message to the subscribed topic.
At server-side I have a class called EventSystem that provides methods for subscribing and unsubscribing from topics, and also for posting messages (for publishers).
To subscribe i thought that the client must specify the topic and also itself ( means that a client calls in this way: obj.subscribe("mytopic", this).
The EventSystem handles a list of all clients, and whenever a new message is posted it goes trough all clients and invokes the handleMessage(String msg) method that all Clients have to provide.
On my local machine without RMi this concept works just great.
I now tried to get it working using RMI , but I get the following Exception when starting the client (the server starts fine) :
Looking up for rmiregistry at 138.232.248.22:1099
Subscriber exception:
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
        java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
        java.io.InvalidClassException: SubscriberImpl; SubscriberImpl; class invalid for deserialization
        at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:336)
        at sun.rmi.transport.Transport$1.run(Transport.java:159)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
        at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)
        at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255)
        at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:233)
        at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:142)
        at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:178)
        at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:132)
        at $Proxy0.subscribe(Unknown Source)
        at SubscriberImpl.main(SubscriberImpl.java:48)
Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
        java.io.InvalidClassException: SubscriberImpl; SubscriberImpl; class invalid for deserialization
        at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:293)
        at sun.rmi.transport.Transport$1.run(Transport.java:159)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
        at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.InvalidClassException: SubscriberImpl; SubscriberImpl; class invalid for deserialization
        at java.io.ObjectStreamClass.checkDeserialize(ObjectStreamClass.java:713)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1733)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
        at sun.rmi.server.UnicastRef.unmarshalValue(UnicastRef.java:306)
        at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:290)
        ... 9 more
Caused by: java.io.InvalidClassException: SubscriberImpl; class invalid for deserialization
        at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:587)
        at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1583)
        at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732)
        ... 13 moreI googled now for 2 hours but can't resolve the problem alone. As far as I can understand I have to serialize Objects that I want to send to the server, right?
So how can i do this? I've never used serialization till now.
any ideas how to solve this problem?
greets from italy and sorry for my very weak english
bd_italy

A class has been modified after deployment. Stop the Registry, clean, recompile, and redeploy.

JSP client in RMI system - java.rmi.UnmarshalException: error unmarshalling

Hi,
Im developing a login part for a distributed airline reservation system using JSP as the client but while executing the jsp, the error that is being catched is :
java.rmi.UnmarshalException: error unmarshalling return; nested exception is: java.lang.ClassNotFoundException: AirlineImpl_Stub (no security manager: RMI class loader disabled)
Here are my codes:
//Interface - Airline.java
package Air;
import java.rmi.*;
public interface Airline extends Remote
     public int CheckUname(String username) throws RemoteException;
}//implementation - AirlineImpl.java
import java.net.*;
import java.io.*;
import java.sql.*;
import java.rmi.*;
import java.rmi.server.UnicastRemoteObject;
public class AirlineImpl extends UnicastRemoteObject implements Airline
     public AirlineImpl() throws RemoteException
          super();
     public int CheckUname(String username) throws RemoteException
          try
               int UnameCount = 0;
               String xxx = "eaglebeta";
               if(username.equals(xxx)
                    UnameCount++;
               return UnameCount;
          catch (Exception e3)
               System.out.println("Error: " + e3);
               return 0;
}//Server - AirlineServer.java
import java.rmi.*;
import java.rmi.server.UnicastRemoteObject;
public class AirlineServer
     public static void main(String arg[])
          try
               Airline myAirline = new AirlineImpl();
               Naming.rebind("Airline", myAirline);
               System.out.println();
               System.out.println("************************************");
               System.out.println(" >>> Airline Reservation System <<< ");
               System.out.println("    >>> Server is Listening! <<<    ");
               System.out.println("************************************");
               System.out.println();
          catch (RemoteException e)
               //System.out.println("Error: " + e);
               System.out.println("RMI Registry is not active!");
               System.out.println("Activate RMI Registry and retry!");
               System.out.println("Bye bye, exiting...");
          catch (java.net.MalformedURLException e)
               //System.out.println("URL Error: "+ e);
               System.out.println("URL Malformed!");
               System.out.println("Bye bye, exiting...");
}//JSP client - newuser.jsp
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>
<%@ page import="java.rmi.*, javax.servlet.*" %>
<%@ page import="java.util.*, java.lang.*, java.io.*, Air.Airline" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body bgcolor="#99CCFF">
<%
Object Airline = null;
try
Airline Air = (Airline)Naming.lookup("rmi://localhost/Airline");
String Name = "eaglebeta";
if(Air.CheckUname(Name)>0)
     %>
          Username already exists, choose another name
     <%
else
     %>
     <%=Name%>
     <%
catch (Exception e1)
%>
<%=e1%>
<%
%>
</body>
</html>The server, implementation, interface and stub are in a folder named "Airline Server" located on my desktop.
The interface and stub again are in another folder named "Air" located in the "classes\Air" directory which is located in the tomcat 5.5 installation directory!
The JSP client is located in the "Root" folder in the tomcat 5.5 installation derectory!
1. I start the registry in the "Airline Server" folder by typing rmiregistry
2. Load the Airline Server - java AirlineServer
3. Call the jsp - http://localhost/newuser.jsp
And i get the following error:
java.rmi.UnmarshalException: error unmarshalling return; nested exception is: java.lang.ClassNotFoundException: AirlineImpl_Stub (no security manager: RMI class loader disabled)
Please help me to solve this problem!

When I am including security manager in my JSP code, the browser just get blank without any display
if(System.getSecurityManager() == null)
     System.setProperty("java.security.policy", "java.policy");
    System.setSecurityManager(new RMISecurityManager());
}Please, someone solve my problem! Im realy stuck and I don't know how to proceed! Provide me with a solution or any tutorial that would help me...

"java.rmi.UnmarshalException: error unmarshalling" at Applet with RMI comm.

Hello,
I am trying to make an Applet work with an RMI server, but i keep getting the same exception again and again whatever i do.
More specifically, i get the following :
java.rmi.UnmarshalException: error unmarshalling return; nested exception is:
     java.net.MalformedURLException: unknown protocol: c
     at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
     at server.ClientDemo.initGUI(ClientDemo.java:100)
     at server.ClientDemo.<init>(ClientDemo.java:85)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
     at java.lang.reflect.Constructor.newInstance(Unknown Source)
     at java.lang.Class.newInstance0(Unknown Source)
     at java.lang.Class.newInstance(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Caused by: java.net.MalformedURLException: unknown protocol: c
     at java.net.URL.<init>(Unknown Source)
     at java.net.URL.<init>(Unknown Source)
     at java.net.URL.<init>(Unknown Source)
     at sun.rmi.server.LoaderHandler.pathToURLs(Unknown Source)
     at sun.rmi.server.LoaderHandler.loadProxyClass(Unknown Source)
     at java.rmi.server.RMIClassLoader$2.loadProxyClass(Unknown Source)
     at java.rmi.server.RMIClassLoader.loadProxyClass(Unknown Source)
     at sun.rmi.server.MarshalInputStream.resolveProxyClass(Unknown Source)
     at java.io.ObjectInputStream.readProxyDesc(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)
     ... 13 more
The exeption is thrown at the following line :
               remoteReference = (RMIServer) registry.lookup(RMIServer.REGISTRY_NAME);
This is the code of the server which seems to be running ok:
if(System.getSecurityManager()==null)
               System.setSecurityManager(new SecurityManager());
          registry = LocateRegistry.createRegistry(1099);
          RMIServer sr=(RMIServer) UnicastRemoteObject.exportObject(new ServerDemo(),1099);
          registry.rebind(RMIServer.REGISTRY_NAME, sr);
and the client:
registry = LocateRegistry.getRegistry("localhost");
remoteReference = (RMIServer) registry.lookup(RMIServer.REGISTRY_NAME);
Thank you in advance
Alex
Forgot to mention that i am setting the security policy and codebase programmatically:
System.setProperty("java.security.policy","C:\\Users\\Alex\\workspace\\Demo\\grantall.policy");
          System.setProperty("java.rmi.server.codebase","C:\\Users\\Alex\\workspace\\Demo\\bin");
Edited by: Alkon on May 15, 2008 4:31 PM

I edited the code that sets the security and i am now getting the following error, again at the lookup:
java.rmi.UnmarshalException: Error unmarshaling return header; nested exception is:
     java.io.EOFException
     at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
     at sun.rmi.server.UnicastRef.invoke(Unknown Source)
     at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
     at server.ClientDemo.initGUI(ClientDemo.java:101)
     at server.ClientDemo.<init>(ClientDemo.java:91)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
     at java.lang.reflect.Constructor.newInstance(Unknown Source)
     at java.lang.Class.newInstance0(Unknown Source)
     at java.lang.Class.newInstance(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Caused by: java.io.EOFException
     at java.io.DataInputStream.readByte(Unknown Source)
     ... 15 more

Java.rmi.UnmarshalException: error unmarshalling arguments;

Hi!
I'm a newbe with rmi, and I try to use a test program, from Thinking in Java:
ITiempoPerfecto.java
package c15.rmi;
import java.rmi.*;
interface ITiempoPerfecto extends Remote {
     long obtenerTiempoPerfecto() throws RemoteException;
TiempoPerfecto.java
package c15.rmi;
import java.rmi.*;
import java.rmi.server.*;
import java.rmi.registry.*;
import java.net.*;
public class TiempoPerfecto extends UnicastRemoteObject implements ITiempoPerfecto {
     public long obtenerTiempoPerfecto () throws RemoteException {
          return System.currentTimeMillis();
     public TiempoPerfecto() throws RemoteException {
           super();
     public static void main(String[] args) throws Exception {
          System.setSecurityManager(new RMISecurityManager());
          TiempoPerfecto tp=new TiempoPerfecto();
          Naming.bind("//localhost/TiempoPerfecto",tp);
          System.out.println("Preparado para dar la hora");
}and
MostrarTiempoPerfecto.java
package c15.rmi;
import java.rmi.*;
import java.rmi.registry.*;
public class MostrarTiempoPerfecto {
     public static void main(String[] args) throws Exception {
          System.setSecurityManager( new RMISecurityManager());
          ITiempoPerfecto t=(ITiempoPerfecto)Naming.lookup("//localhost/TiempoPerfecto");
          for (int i=0;i<10;i++)
               System.out.println("Tiempo perfecto: "+t.obtenerTiempoPerfecto());
}I compile all the files normally.
Later I do:
rmiregistry &
rmic c15.rmi.TiempoPerfecto(This only generate the file TiempoPerfecto_Stub.class, it's ok?)
Without warnings or errors. But when I try to create a server object
java c15/rmi/TiempoPerfectoI obtain this:
Exception in thread "main" java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
        java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
        java.lang.ClassNotFoundException: c15.rmi.TiempoPerfecto_Stub
        at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:385)
        at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:240)
        at sun.rmi.transport.Transport$1.run(Transport.java:153)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
        at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
        at java.lang.Thread.run(Thread.java:595)
.......What is the mistake? What may I do to run this programs?
Thank you!

You must change your current directory to your class path (EX: java c15/rmi/TiempoPerfecto) then execute command remiregistry.

Unmarshalling error when invoking a remote call in weblogic 9.1/jdk 1.5.

Hi,
We are trying to upgrade the weblogic from 7.1 to 9.1. I am getting the following error "java.lang.ClassNotFoundException: Failed to load class <b>void</b> ", when a remote method whose return type is void is invoked. Also I am using jdk 1.5.0_04. Any hints on what might be wrong here is appreciated. I have attached the stack trace below.
thanks
Sridhar Sidda
;;---------Stack Trace ----------------------------
Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: java.lang.ClassNotFoundException: Failed to load class void at weblogic.rjvm.ResponseImpl.unmarshalReturn(ResponseImpl.java:191) at weblogic.rmi.internal.BasicRemoteRef.invoke(BasicRemoteRef.java:176) at com.sabre.fltsked.util.security.ScheduleSecurityValidator3_910_WLStub.hasPermision(Unknown Source) at com.sabre.fltsked.util.security.FSSecurityInterceptor.invoke(FSSecurityInterceptor.java:48) ... 5 more Caused by: java.lang.ClassNotFoundException: Failed to load class void at weblogic.rmi.utils.WLRMIClassLoaderDelegate.loadClass(WLRMIClassLoaderDelegate.java:203) at weblogic.rmi.utils.WLRMIClassLoaderDelegate.loadClass(WLRMIClassLoaderDelegate.java:128) at weblogic.rmi.utils.Utilities.loadClass(Utilities.java:308) at weblogic.rmi.utils.Utilities.loadClass(Utilities.java:344) at weblogic.rjvm.MsgAbbrevInputStream.resolveClass(MsgAbbrevInputStream.java:395) at weblogic.utils.io.ChunkedObjectInputStream$NestedObjectInputStream.resolveClass(ChunkedObjectInputStream.java:255) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1538) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1460) at java.io.ObjectInputStream.readClass(ObjectInputStream.java:1427) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1282) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339) at weblogic.utils.io.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:195) at weblogic.rjvm.MsgAbbrevInputStream.readObject(MsgAbbrevInputStream.java:555) at weblogic.utils.io.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:191) at com.sabre.fltsked.util.security.ScheduleSecurityValidator3_WLSkel.invoke(Unknown Source) at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:517) at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:407) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:147) at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:403) at weblogic.rmi.internal.BasicServerRef.access$300(BasicServerRef.java:56) at weblogic.rmi.internal.BasicServerRef$BasicExecuteRequest.run(BasicServerRef.java:934) at weblogic.work.ExecuteThread.execute(ExecuteThread.java:207) at weblogic.work.ExecuteThread.run(ExecuteThread.java:179)<pre></pre>

hi,
I am also getting the same exception when making call to the server.
If u get the solution for this problem.can u please tell me why this is happening.
Thanks.

Java.rmi.UnmarshalException:error

hi,
A rmi program does not work on my pc but it worked on others pc there are three programs ie RMIServer.java which is the server application ,RMIClient.java which is the client application and RMIInterface.java which has two methods which are remote all these programs gets compiled but while running it from the dos prompt it gives these errors:
RemoteException occured in serverthread;nested exception is:java.rmi.UnmarshalException:error unmarshalling arguments;nested exception is:java.lang.ClassNotFoundException:RMIServer_stub
what is the problem how does it work on others pc and not on mine how should i handle these exception what are the reasons for its occurrance please help

It might help to start the rmiregistry from the directory where your class files are stored.
In this case the rmiregistry adds its working directory to its codebase.
Just keep in mind that the rmiregistry works in a similar fashion to the javac compiler & needs to be able to find the _Stub & _Skel class files.

RMI Stub Error

solved it!
wheeewwww i dont know why but im sure i've used the option of forward slash before.
continuation of the problems below.....
hi!
i've been trying to debug this auto downloading of Stub or classes, but i cant see what's wrong with the code that it cant see the stub... here's the code
import java.rmi.Naming;
import java.rmi.RMISecurityManager;
import classServer.ClassFileServer;
import java.io.IOException;
public class ProcessServer{
       private static ClassFileServer cfs = null;
       public static void main(String[] args){
              setOptions();
              //startHTTP();
              if (System.getSecurityManager() == null) {
                  System.setSecurityManager(new RMISecurityManager());
              try{
                  System.out.println("Starting server...");
                  Process p = new ProcessImpl("tuaman");
                  //String host = "rmi://localhost/TProcess";
                  //Naming.rebind(host, p);
                  String url = "TProcess";
                  Naming.rebind(url, p);
                  System.out.println("RMI binded...");
              }catch(Exception e) {System.out.println("Error creating server..." + e);}
       private static void setOptions(){
               System.setProperty("java.rmi.server.codebase", "file:/C:\\Restua\\temp\\rmi\\/");
                 System.setProperty("java.security.policy", "java.policy");
       private static void startHTTP(){
               String loc = "C:\\Restua\\temp\\rmi";
                 try {
                    cfs = new ClassFileServer(2001, loc);
               }catch(IOException io){ System.out.println("err cfs : " + io);}
import java.rmi.Naming;
import java.rmi.RemoteException;
import java.net.MalformedURLException;
import java.rmi.NotBoundException;
import java.rmi.RMISecurityManager;
public class ProcessClient {
    public static void main(String[] args) {
        setOptions();
        if (System.getSecurityManager() == null) {
            System.setSecurityManager(new RMISecurityManager());
        try {
            //String url = "rmi://localhost/TProcess";
            String url = "TProcess";
            Process p = (Process)
                           Naming.lookup(url);
            System.out.println( p.getDescription() );
     catch(Exception e){
         System.out.println("Exception all.");
         public static void setOptions(){
          System.setProperty("java.rmi.server.codebase", "file:/C:\\Restua\\temp\\rmi\\/");
          System.setProperty("java.security.policy", "java.policy");
} thanks again =)
--my previous post.....
hi!
I'm tying to run an RMI, on the tutorial it says run the service, with the classpath, here's my setup
C:\Restua\temp\rmi>dir
Volume in drive C has no label.
Volume Serial Number is D805-23B8
Directory of C:\Restua\temp\rmi
07/31/2006 11:38 AM    <DIR>          .
07/31/2006 11:38 AM    <DIR>          ..
07/31/2006 11:07 AM               219 Process.class
07/31/2006 11:07 AM               162 Process.java
07/31/2006 11:22 AM             1,099 ProcessClient.class
07/31/2006 11:21 AM             1,344 ProcessClient.java
07/31/2006 11:13 AM               608 ProcessImpl.class
07/31/2006 11:12 AM               460 ProcessImpl.java
07/31/2006 11:27 AM             1,649 ProcessImpl_Stub.class
07/31/2006 11:37 AM               913 ProcessServer.class
07/31/2006 11:37 AM               415 ProcessServer.java
               9 File(s)          6,869 bytes
               2 Dir(s) 16,828,911,616 bytes free
C:\Restua\temp\rmi>here's the content of the class...
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface Process extends Remote{
       String getDescription() throws RemoteException;
import java.rmi.server.UnicastRemoteObject;
import java.rmi.RemoteException;
public class ProcessImpl extends UnicastRemoteObject
                         implements Process{
       private String desc;
       public ProcessImpl(String d) throws RemoteException{
              super();
              desc = d;
       public String getDescription() throws RemoteException{
              return "I am " + desc;
import java.rmi.Naming;
public class ProcessServer{
       public static void main(String[] args){
              try{
                  System.out.println("Starting server...");
                  Process p = new ProcessImpl("tuaman");
                  Naming.rebind("rmi://localhost/1099/TProcess", p);
              }catch(Exception e) {System.out.println("Error creating server..." + e);}
}i opened a command windom ran rmiregistry on it, then on the other shell i ran this...
C:\Restua\temp\rmi>java -classpath . ProcessServer
Starting server...
Error creating server...java.rmi.ServerException: RemoteException occurred in se
rver thread; nested exception is:
        java.rmi.UnmarshalException: error unmarshalling arguments; nested excep
tion is:
        java.lang.ClassNotFoundException: ProcessImpl_Stubeven with a java ProcessServer that error occurs, what could be wrong? Why cant it locate the Stub? Thank you so much again Sir/Mam =)
updates....
it works fine now =) made a security or policy file, then added a security manager =)
import java.rmi.Naming;
import java.rmi.RMISecurityManager;
public class ProcessServer{
       public static void main(String[] args){
              if (System.getSecurityManager() == null) {
                  System.setSecurityManager(new RMISecurityManager());
              try{
                  System.out.println("Starting server...");
                  Process p = new ProcessImpl("tuaman");
                  String host = "rmi://localhost/TProcess";
                  Naming.rebind(host, p);
                  System.out.println("RMI binded...");
              }catch(Exception e) {System.out.println("Error creating server..." + e);}
}Message was edited by:
tuaman
Message was edited by:
tuaman
Message was edited by:
tuaman
Message was edited by:
tuaman

You have a mixture of GNU java and Sun Java installed. Get rid of the former.

RMI Unmarshaling Error

I got a problem with runing RMI application.Sometimes it works well, but when I made some changes to Impl class, it sometimes shows :
Exception in thread "main" java.rmi.ServerException: Server RemoteException; nes
ted exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested excep
tion is:
java.lang.ClassNotFoundException: com.qa.rmi.QAserverImpl_Stub
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Stream
RemoteCall.java:247)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:
223)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:350)
at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
at java.rmi.Naming.rebind(Naming.java:159)
at com.qa.rmi.QAserverImpl.main(QAserverImpl.java:29)
Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested ex
ception is:
java.lang.ClassNotFoundException: com.qa.rmi.QAserverImpl_Stub
Caused by: java.lang.ClassNotFoundException: com.qa.rmi.QAserverImpl_Stub
I will appreciate whoeven gives me some idea to solve this problem.
David

Most likely your java.server.rmi.codebase system property is not properly set (or if you are not trying do download the class files automatically, your classpath is not set properly).
It looks like the rmiregistry cannot find the class file for the com.qa.rmi.QAserverImpl rmi stub. Either you did not generate the stub file with rmic, or the codebase (or classpath) does not point to where it can be found.

Rmi marshalling error after servicegen

I am implementing a service using EJB (Sessions + CMP entities). Clients will access
this service via rmi/t3, CORBA/iiop or via SOAP.
I am generating the Webservices layer using the servicegen ant task.
However, when I try to access my deployed service using rmi/t3, I get the following
exception:
There was a RemoteException .java.rmi.UnmarshalException: error unmarshalling arguments;
nested exception is:
java.io.InvalidClassException: com.x.BondSearchFilterDTO; Local class not compatible:
stream classdesc serialVersionUID=-7233317835783801493 local class serialVersionUID=-5293624757153343350
I should be able to simultaneously access my EJB's via SOAP and rmi, no?
(see below for full stack trace + ant task)
-Nick
[fullStackTracePlusAntTask.zip]

Hmmm... seems like it was a transient thing. After an appserver restart and an "applications"
directory clean, the problem seems to have vanished.
Thanks for your help.
-Nick
"manoj cheenath" <[email protected]> wrote:
Sure, you should be able to access the service through RMI/t3 and soap
at the same time.
Is your webservice client package name same as your ejb's package name?
Try not to use the same package name. If this is not helping try not to
generate
client within servicegen. You can use clientgen by passing in the wsdl file.
I suspect your original class is overwritten while generating the web
service
client.
regards,
-manoj
"Nick Minutello" <[email protected]> wrote
in message news:3d03ff71$[email protected]..
I am implementing a service using EJB (Sessions + CMP entities). Clientswill access
this service via rmi/t3, CORBA/iiop or via SOAP.
I am generating the Webservices layer using the servicegen ant task.
However, when I try to access my deployed service using rmi/t3, I getthe
following
exception:
There was a RemoteException .java.rmi.UnmarshalException: errorunmarshalling arguments;
nested exception is:
java.io.InvalidClassException: com.x.BondSearchFilterDTO; Local classnot
compatible:
stream classdesc serialVersionUID=-7233317835783801493 local classserialVersionUID=-5293624757153343350
I should be able to simultaneously access my EJB's via SOAP and rmi, no?
(see below for full stack trace + ant task)
-Nick

RemoteException: 111 java.rmi.ServerError: Error occurred in server thread

Hi,
I'm just new to the RMI field of JAVA. I'm trying to write a program that import the math.jar file in the server side. And the client end can invoke the methods of math.jar and get the value.
I got the error messages as below:
RemoteException: 111 java.rmi.ServerError: Error occurred in server thread; nested exception is:
java.lang.NoClassDefFoundError: org/mathwhizz/Heron
It can work well if I use source classes(*.class) directly instead of importing math.jar. The failure only happened when I try to make use of jar file. Thus I guess my setup and configuration should be ok. Is there anything I should be very careful if I try to run RMI and import a jar file in the program of server side ?
Do I need to use JNLP and web start application in this issue?
I'm appreciated for your responses...thanks...
Sincerely,
Brandon

I've got a problem with rmi, when I launch my server, I have this error:
Erreur du remote: java.rmi.ServerError: Error occurred in server thread; nested exception is:
java.lang.NoClassDefFoundError: com/borland/dx/dataset/DataSetData
Help me please
Thank you

Java.rmi.MarshalException: error marshalling arguments

I've two class Client and Main. Eventnotify is implemented in class Client using RMI techniques. Here is sample
public interface EventNotify extends Remote {
void SendNotification (String str) throws RemoteException;
public class Client implements EventNotify {
     //implementation of EventNotify
     public void SendNotification(String str) {
     System.out.println("from srver: ..." +str);
class Main {
public static void main(String[] args) {
Client clnt = new Client();
int val = stub.register_client(host, clnt); //THE ERROR IS HERE
The idea is to pass remote objects from client to a server. I've a server program running continously, but the problem is on passing objects of type Client. I'm facing marshaling problem.
AND THE ERROR IS
Client exception: java.rmi.MarshalException: error marshalling arguments; nested exception is:
     java.io.NotSerializableException: Client
java.rmi.MarshalException: error marshalling arguments; nested exception is:
     java.io.NotSerializableException: Client
     at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:156)
     at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:195)
     at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:149)
     at $Proxy0.register_client(Unknown Source)
     at Main.main(Client.java:74)
Thanks for helping.
Caused by: java.io.NotSerializableException: Client
     at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1173)
     at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:343)
     at sun.rmi.server.UnicastRef.marshalValue(UnicastRef.java:292)
     at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:151)

Probably I have a similar problem while calling remote object's method with parameter looks like that :
public class ParamClass extends AbstractParamClass implements Runnable,
        java.io.Serializable {
    private NodeList field1; // part of crimson's tree
    private NamedNodeMap field2 = null;// part of crimson's tree
public class RmiRemote extends AbstractRemote { // Remote Object Class
@Override
public Object remoteMethod1() throws RemoteException{
ParamClass param = new ParamClass("build with crimson");
CustomInterface stub = (CustomInterface) registry.lookup(name);
stub.callRemoteMethod(param); // exception here
java.rmi.MarshalException: error marshalling arguments; nested exception is:
        java.io.NotSerializableException: org.apache.crimson.tree.AttributeSet
        at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:138)
        at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:178)when I build param object with xerces - no exception occurs . Other methods of remote object doing well. Remote object extends AbstractRemote superclass derived from UnicastRemoteObject. How can I avoid this problem and call method with crimson's tree fields parameter?
Thank you.

Java.rmi.UnmarshalException: Error unmarshaling return header

Hi,
We are running an RMI server instance to serve data ( from memory) to clients. It works fine if fewer number of inquiries goes in. But when the number of inquiries are larger, I am getting some exceptions at the client side. The server crashes without throwing any exceptions. Following are the exceptions received at client side:
java.rmi.UnmarshalException: Error unmarshaling return header; nested exception is:
     java.net.SocketException: Connection reset
     at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:203)
     at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:133)
     at com.emf1.dataserver.KeyFrequencyKeeper_Stub.getDUNSCounts(Unknown Source)
     at com..match.KeyFrequencyKeeperProxy.getKeyKQSs(KeyFrequencyKeeperProxy.java:307)
     at com.emf1.match.KeyGenerator.generateKeys(KeyGenerator.java:453)
     at com.emf1.match.InquiryProcessor.run(InquiryProcessor.java:870)
     at java.lang.Thread.run(Thread.java:534)
Caused by: java.net.SocketException: Connection reset
     at java.net.SocketInputStream.read(SocketInputStream.java:168)
     at java.io.BufferedInputStream.fill(BufferedInputStream.java:183)
     at java.io.BufferedInputStream.read(BufferedInputStream.java:201)
     at java.io.DataInputStream.readByte(DataInputStream.java:331)
     at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:189)
     ... 6 more
The period of time, the server keeps on running (before it crashes) is also not the same. Sometimes it works fine without any problem. But most of the time the server crashes after processing some records.
I don't know why this is happening.
Please help...
Thanks in advance..

I have this error too when I running my rmi server site program.
I am running it in Linux Environment.
Anyone got any idea about this?

RemoteException: java.rmi.ConnectIOException: error during JRMP connection

We have a Java application implementing a RMI server.
The server uses with the jacob api in order to generate Word files in a windows system.
My clients work in linux.
The RMI method is synchronized in order not to have problems executing Word from multiple threads.
The application and the RMI server work all right for some time, but after some hours (sometimes days) the client throws the following error:
RemoteException: java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is:
java.net.SocketException: Connection reset

Hi Varun,
This is definitely required even if you are on WAS6.40.
After copying this , you have to also follow the register dll using this command
rgsvr32 "c:\Winnt\system32\librfc32.dll"
check the OS your using wether it is windowsXP/2003 or 2000.
there are seperate commands for them to register the dll.
This is available in the installation guide.
we also had the same problem and then we did this and it worked for us.
f you have done this, then there are other possibilities also
1. Install SOAP toolkit on the CRM server as this is required to establish the connectivity
2. See whether the MAPBOX services are deployed on the SAP J2EE engine
3. Create RFC through SM59 only for mapbox and register them.
4. See if there are any old versions of Java on your machine then uninstall them and install the required java components.
Let us know if it resolved the problem
Thanks
Yash
reward points if it helps.

RMI server error under Linux

Hi all,
I'm not excatly sure, whether this is the right forum. Anyway, my problem is this:
I've written a JApplet that calls several methods over RMI. The RMI server is up and running properly. Most of the functions work well. One that initializes a JTree, however, causes problems. I get the following error message and I am stumped:
java.rmi.ServerError: Error occurred in server thread; nested exception is:
     java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.
     at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:289)
     at sun.rmi.transport.Transport$1.run(Transport.java:148)
     at java.security.AccessController.doPrivileged(Native Method)
     at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
     at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
     at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
     at java.lang.Thread.run(Thread.java:536)
     at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:247)
     at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:223)
     at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:133)
     at de.uni_mannheim.wifo2.mlearning.portal.ServerFunctions_Stub.buildStructure(Unknown Source)
     at de.uni_mannheim.wifo2.mlearning.portal.CourseHandlerC.initialize(CourseHandlerC.java:68)
     at de.uni_mannheim.wifo2.mlearning.portal.MobilUM.actionPerformed(MobilUM.java:641)
     at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1764)
     at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1817)
     at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:419)
     at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:257)
     at javax.swing.AbstractButton.doClick(AbstractButton.java:289)
     at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1109)
     at javax.swing.plaf.basic.BasicMenuItemUI$MouseInputHandler.mouseReleased(BasicMenuItemUI.java:943)
     at java.awt.Component.processMouseEvent(Component.java:5093)
     at java.awt.Component.processEvent(Component.java:4890)
     at java.awt.Container.processEvent(Container.java:1566)
     at java.awt.Component.dispatchEventImpl(Component.java:3598)
     at java.awt.Container.dispatchEventImpl(Container.java:1623)
     at java.awt.Component.dispatchEvent(Component.java:3439)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3450)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3165)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3095)
     at java.awt.Container.dispatchEventImpl(Container.java:1609)
     at java.awt.Component.dispatchEvent(Component.java:3439)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:450)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
Caused by: java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.
     at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
     at sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:125)
     at java.lang.Class.forName0(Native Method)
     at java.lang.Class.forName(Class.java:140)
     at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:62)
     at java.awt.Font.initializeFont(Font.java:309)
     at java.awt.Font.<init>(Font.java:345)
     at javax.swing.plaf.metal.DefaultMetalTheme$FontDelegate.getFont(DefaultMetalTheme.java:195)
     at javax.swing.plaf.metal.DefaultMetalTheme.getFont(DefaultMetalTheme.java:153)
     at javax.swing.plaf.metal.DefaultMetalTheme.getUserTextFont(DefaultMetalTheme.java:137)
     at javax.swing.plaf.metal.MetalLookAndFeel$FontActiveValue.createValue(MetalLookAndFeel.java:1405)
     at javax.swing.UIDefaults.getFromHashtable(UIDefaults.java:196)
     at javax.swing.UIDefaults.get(UIDefaults.java:126)
     at javax.swing.MultiUIDefaults.get(MultiUIDefaults.java:44)
     at javax.swing.UIDefaults.getFont(UIDefaults.java:346)
     at javax.swing.UIManager.getFont(UIManager.java:491)
     at javax.swing.plaf.basic.BasicTreeUI.installDefaults(BasicTreeUI.java:596)
     at javax.swing.plaf.basic.BasicTreeUI.installUI(BasicTreeUI.java:530)
     at javax.swing.plaf.metal.MetalTreeUI.installUI(MetalTreeUI.java:86)
     at javax.swing.JComponent.setUI(JComponent.java:449)
     at javax.swing.JTree.setUI(JTree.java:551)
     at javax.swing.JTree.updateUI(JTree.java:567)
     at javax.swing.JTree.<init>(JTree.java:522)
     at javax.swing.JTree.<init>(JTree.java:498)
     at javax.swing.JTree.<init>(JTree.java:481)
     at de.uni_mannheim.wifo2.mlearning.portal.ServerFunctions.buildStructure(ServerFunctions.java:237)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
     at sun.rmi.transport.Transport$1.run(Transport.java:148)
     at java.security.AccessController.doPrivileged(Native Method)
     at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
     at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
     at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
     at java.lang.Thread.run(Thread.java:536)
The entire system had been tested under a Windows XP environment and works without a glitch. Now I've installed the exact same system under unix and this happens!
If anyone has an idea I would be very grateful!
Kind regards,
Falk

Hi again,
alternately I get another error doing the excat same thing:
java.rmi.ServerError: Error occurred in server thread; nested exception is:
     java.lang.NoClassDefFoundError
     at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:289)
     at sun.rmi.transport.Transport$1.run(Transport.java:148)
     at java.security.AccessController.doPrivileged(Native Method)
     at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
     at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
     at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
     at java.lang.Thread.run(Thread.java:536)
     at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:247)
     at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:223)
     at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:133)
     at de.uni_mannheim.wifo2.mlearning.portal.ServerFunctions_Stub.buildStructure(Unknown Source)
     at de.uni_mannheim.wifo2.mlearning.portal.CourseHandlerC.initialize(CourseHandlerC.java:68)
     at de.uni_mannheim.wifo2.mlearning.portal.MobilUM.actionPerformed(MobilUM.java:641)
     at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1764)
     at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1817)
     at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:419)
     at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:257)
     at javax.swing.AbstractButton.doClick(AbstractButton.java:289)
     at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1109)
     at javax.swing.plaf.basic.BasicMenuItemUI$MouseInputHandler.mouseReleased(BasicMenuItemUI.java:943)
     at java.awt.Component.processMouseEvent(Component.java:5093)
     at java.awt.Component.processEvent(Component.java:4890)
     at java.awt.Container.processEvent(Container.java:1566)
     at java.awt.Component.dispatchEventImpl(Component.java:3598)
     at java.awt.Container.dispatchEventImpl(Container.java:1623)
     at java.awt.Component.dispatchEvent(Component.java:3439)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3450)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3165)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3095)
     at java.awt.Container.dispatchEventImpl(Container.java:1609)
     at java.awt.Component.dispatchEvent(Component.java:3439)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:450)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
Caused by: java.lang.NoClassDefFoundError
     at java.lang.Class.forName0(Native Method)
     at java.lang.Class.forName(Class.java:140)
     at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:62)
     at java.awt.Font.initializeFont(Font.java:309)
     at java.awt.Font.<init>(Font.java:345)
     at javax.swing.plaf.metal.DefaultMetalTheme$FontDelegate.getFont(DefaultMetalTheme.java:195)
     at javax.swing.plaf.metal.DefaultMetalTheme.getFont(DefaultMetalTheme.java:153)
     at javax.swing.plaf.metal.DefaultMetalTheme.getUserTextFont(DefaultMetalTheme.java:137)
     at javax.swing.plaf.metal.MetalLookAndFeel$FontActiveValue.createValue(MetalLookAndFeel.java:1405)
     at javax.swing.UIDefaults.getFromHashtable(UIDefaults.java:196)
     at javax.swing.UIDefaults.get(UIDefaults.java:126)
     at javax.swing.MultiUIDefaults.get(MultiUIDefaults.java:44)
     at javax.swing.UIDefaults.getFont(UIDefaults.java:346)
     at javax.swing.UIManager.getFont(UIManager.java:491)
     at javax.swing.plaf.basic.BasicTreeUI.installDefaults(BasicTreeUI.java:596)
at javax.swing.plaf.basic.BasicTreeUI.installUI(BasicTreeUI.java:530)
     at javax.swing.plaf.metal.MetalTreeUI.installUI(MetalTreeUI.java:86)
     at javax.swing.JComponent.setUI(JComponent.java:449)
     at javax.swing.JTree.setUI(JTree.java:551)
     at javax.swing.JTree.updateUI(JTree.java:567)
     at javax.swing.JTree.<init>(JTree.java:522)
     at javax.swing.JTree.<init>(JTree.java:498)
     at javax.swing.JTree.<init>(JTree.java:481)
     at de.uni_mannheim.wifo2.mlearning.portal.ServerFunctions.buildStructure(ServerFunctions.java:237)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
     at sun.rmi.transport.Transport$1.run(Transport.java:148)
     at java.security.AccessController.doPrivileged(Native Method)
     at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
     at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
     at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
     at java.lang.Thread.run(Thread.java:536)
Thanks again!

RMI Unmarshalling error

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