Issue when a standalone client invoke a method on an EJB

Question

I do a simple ejb (like SayHello sample) and i create a standalone client that call one method of this EJB.
When i run the client i have the following error from the eclipse IDE (Error is thrown at lookup):
Exception in thread "main" java.lang.AssertionError: java.lang.ClassNotFoundException: test.IHelloWorld
     at weblogic.ejb.container.internal.RemoteBusinessIntfGenerator.generateRemoteInterface(RemoteBusinessIntfGenerator.java:57)
     at weblogic.ejb.container.internal.RemoteBusinessIntfProxy.readObject(RemoteBusinessIntfProxy.java:205)
     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:597)
     at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
     at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849)
     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
     at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947)
     at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871)
     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
     at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
     at weblogic.utils.io.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:197)
     at weblogic.rjvm.MsgAbbrevInputStream.readObject(MsgAbbrevInputStream.java:564)
     at weblogic.utils.io.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:193)
     at weblogic.rmi.internal.ObjectIO.readObject(ObjectIO.java:62)
     at weblogic.rjvm.ResponseImpl.unmarshalReturn(ResponseImpl.java:240)
     at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:348)
     at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:259)
     at weblogic.jndi.internal.ServerNamingNode_1030_WLStub.lookup(Unknown Source)
     at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:392)
     at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:380)
     at javax.naming.InitialContext.lookup(InitialContext.java:392)
     at client.MainHello.main(MainHello.java:21)
Caused by: java.lang.ClassNotFoundException: test.IHelloWorld
     at weblogic.ejb.container.deployer.RemoteBizIntfClassLoader.getClassBytes(RemoteBizIntfClassLoader.java:151)
     at weblogic.ejb.container.deployer.RemoteBizIntfClassLoader.loadClass(RemoteBizIntfClassLoader.java:96)
     at weblogic.ejb.container.internal.RemoteBusinessIntfGenerator.generateRemoteInterface(RemoteBusinessIntfGenerator.java:54)
     ... 26 more
The eclipse IDE is runwith the option -vm D:\bea\jdk160_05\bin\java
In eclipse, i configure to use the same jdk.
When i execute the client outside eclipse, all is ok....
Do you have an idée ?
This is the ejb code :
package test;
public interface IHelloWorld {
public static final String JNDI_NAME = "HelloWorld";
public String sayHello( String name);
package test;
import javax.ejb.Remote;
import javax.ejb.Stateless;
import javax.ejb.TransactionAttribute;
import javax.ejb.TransactionAttributeType;
import javax.ejb.TransactionManagement;
import javax.ejb.TransactionManagementType;
@TransactionManagement(TransactionManagementType.CONTAINER)
@TransactionAttribute(TransactionAttributeType.REQUIRED)
@Stateless( name="HelloWorld", mappedName= IHelloWorld.JNDI_NAME)
@Remote( IHelloWorld.class)
public class HelloWorld implements IHelloWorld
public String sayHello (String name) {
final String msg = "Hello " + name + ". The world is wonderfull...";
System.out.println ( msg);
return msg;
This is the client code :
package client;
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.InitialContext;
import test.IHelloWorld;
public class MainHello {
public static void main (String[] args) throws Exception
Hashtable<String, String> properties = new Hashtable<String, String> ();
properties.put (Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
properties.put (Context.PROVIDER_URL, "t3://localhost:7001");
InitialContext ctx = new InitialContext( properties);
IHelloWorld hello = (IHelloWorld)ctx.lookup ( "HelloWorld#test.IHelloWorld");
String result = hello.sayHello ( "franck");
System.out.println ( result);
ctx.close ();
As you can see it is very simple but doesn't work inside eclipse IDE...
Edited by: user11281761 on 30 juin 2009 07:13

Answer 1

Oracle software purchases come with a CSI number that allows customers to have people contact support for products they own. If you or the organization you are working with has not purchased the product or have other support arrangements with Oracle (some partners have this), then you probably will not be able to obtain the patch from Oracle.
You might be able to try a newer release of the product with an OTN evaluation license, WebLogic Server is currently on version 10.3.3, so you are at least 3 releases behind at this point if you are using 10.3.0.