Java.lang.InstantiationException: Error communicating with server:

Question

Hello everybody, I am an easy Helloworld application, the deploy is fine, but when I execute the client it appears the next error:
java.lang.InstantiationException: Error communicating with server: Lookup error:
java.net.ConnectException: Connection refused: connect; nested exception is:
java.net.ConnectException: Connection refused: connect; nested exception
is:
javax.naming.NamingException: Lookup error: java.net.ConnectException: C
onnection refused: connect; nested exception is:
java.net.ConnectException: Connection refused: connect
at com.evermind.server.ApplicationClientContext.createContext(Applicatio
nClientContext.java:300)
at com.evermind.server.ApplicationClientInitialContextFactory.getInitial
Context(ApplicationClientInitialContextFactory.java:190)
at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.init(Unknown Source)
at javax.naming.InitialContext.<init>(Unknown Source)
at hello.HelloClient.main(HelloClient.java:33)
NamingException: Error reading application-client descriptor: Error communicatin
g with server: Lookup error: java.net.ConnectException: Connection refused: conn
ect; nested exception is:
java.net.ConnectException: Connection refused: connect; nested exception
is:
javax.naming.NamingException: Lookup error: java.net.ConnectException: C
onnection refused: connect; nested exception is:
java.net.ConnectException: Connection refused: connect
This is my application client:
// HelloClient.java
package hello;
import javax.ejb.*;
import javax.naming.*;
import javax.rmi.PortableRemoteObject;
import java.io.*;
import java.util.*;
import java.rmi.RemoteException;
* A simple client for accessing an EJB.
public class HelloClient
public static void main(String[] args)
System.out.println("client started...");
try {
// Initial context properties are set in the jndi.properties file
     Hashtable env = new Hashtable();
     env.put(Context.INITIAL_CONTEXT_FACTORY,"com.evermind.server.ApplicationClientInitialContextFactory");
     env.put(Context.PROVIDER_URL, "ormi://ecd11107.eadscasa.casa.corp:23791/helloworld");
     env.put(Context.SECURITY_PRINCIPAL, "admin");
     env.put(Context.SECURITY_CREDENTIALS, "123");
     Context context = new InitialContext(env);
// This for use with com.evermind.server.rmi.RMIInitialContextFactory
//Object homeObject = context.lookup("HelloBean");
// This is for use with com.evermind.server.ApplicationClientInitialContextFactory
Object homeObject = context.lookup("java:comp/env/Helloworld");
// Narrow the reference to HelloHome.
HelloHome home =
     (HelloHome) PortableRemoteObject.narrow(homeObject, HelloHome.class);
     System.out.println("hello home");
// Create remote object and narrow the reference to Hello.
Hello remote =
     (Hello) PortableRemoteObject.narrow(home.create(), Hello.class);
System.out.println(remote.sayHello("James Earl"));
} catch(NamingException e) {
System.err.println("NamingException: " + e.getMessage());
} catch(RemoteException e) {
System.err.println("RemoteException: " + e.getMessage());
} catch(CreateException e) {
System.err.println("FinderException: " + e.getMessage());
Can somebody helps me ???

Answer 1

Thank you, but don�t work well yet. I checked the files orion-application.xml & principals.xml in the directory C:\servOracle\oracle\j2ee\home\application-deployments\helloworld but the result is the same, when I run the client the next error appears:
NamingException: Lookup error: javax.naming.NoPermissionException: Not allowed to look up HelloBean, check the namespace-access tag setting in orion-application.xml for details; nested exception is:
javax.naming.NoPermissionException: Not allowed to look up HelloBean, check the namespace-access tag setting in orion-application.xml for details
This is my orion-application.xml
<?xml version="1.0"?>
<!DOCTYPE orion-application PUBLIC "-//ORACLE//DTD OC4J Application runtime 9.04//EN" "http://xmlns.oracle.com/ias/dtds/orion-application-9_04.dtd">
<orion-application deployment-version="9.0.4.0.0" default-data-source="jdbc/OracleDS" treat-zero-as-null="true">
     <ejb-module remote="false" path="helloworld-ejb.jar" />
     <web-module id="helloworld-web" path="helloworld-web.war" />
     <client-module path="helloworld-client" deployment-time="fce4439997" auto-start="false" />
     <persistence path="persistence" />
     <principals path="principals.xml" />
     <jazn provider="XML" location="jazn-data.xml" />
     <log>
          <file path="application.log" />
     </log>
     <namespace-access>
          <read-access>
               <namespace-resource root="">
                    <security-role-mapping name="<jndi-user-role>">
                         <group name="users" />
                    </security-role-mapping>
               </namespace-resource>
          </read-access>
          <write-access>
               <namespace-resource root="">
                    <security-role-mapping name="<jndi-user-role>">
                         <group name="users" />
                    </security-role-mapping>
               </namespace-resource>
          </write-access>
     </namespace-access>
</orion-application>
And this is my principals.xml
<?xml version="1.0"?>
<!DOCTYPE principals PUBLIC "//ORACLE//DTD OC4J Principals 9.04//EN" "http://xmlns.oracle.com/ias/dtds/principals-9_04.dtd">
<principals>
     <groups>
          <group name="users">
               <description>users</description>
               <permission name="rmi:login" />
          </group>
          <group name="guests">
               <description>guests</description>
          </group>
          <group name="administrators">
               <description>administrators</description>
               <permission name="administration" />
          </group>
     </groups>
     <user username="admin" password="ADMIN">
          <description>The default administrator</description>
          <group-membership group="administrators" />
          <group-membership group="guests" />
          <group-membership group="users" />
     </user>
     <user username="SCOTT" password="TIGER">
          <description>no description</description>
          <group-membership group="users" />
          <group-membership group="administrators" />
     </user>
</principals>
Thanks in advance, please help me....