CommunicationException in EJB project while running the client class : Could not obtain connection to any of these urls: localhost:1099

1
votes

I have created a helloworld app in EJB 3.0 with Jboss 5. When i try to run my client class EjbClientApplication, it throws an exception.

Frequently I am getting below exception. I have done a lot of rnd about it but I couldn't found it as I am new to EJB please help.

Exception:

javax.naming.CommunicationException: Could not obtain connection to any of these urls: localhost:1099 and discovery failed with error: javax.naming.CommunicationException: Receive timed out [Root exception is java.net.SocketTimeoutException: Receive timed out] [Root exception is javax.naming.CommunicationException: Failed to connect to server localhost/127.0.0.1:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server localhost/127.0.0.1:1099 [Root exception is java.net.ConnectException: Connection refused: connect]]] at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1763) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:693) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:686) at javax.naming.InitialContext.lookup(InitialContext.java:392) at com.hex.client.EjbClientApplication.main(EjbClientApplication.java:28) Caused by: javax.naming.CommunicationException: Failed to connect to server localhost/127.0.0.1:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server localhost/127.0.0.1:1099 [Root exception is java.net.ConnectException: Connection refused: connect]] at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:335) at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1734) ... 4 more Caused by: javax.naming.ServiceUnavailableException: Failed to connect to server localhost/127.0.0.1:1099 [Root exception is java.net.ConnectException: Connection refused: connect] at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:305) ... 5 more Caused by: java.net.ConnectException: Connection refused: connect at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) at java.net.Socket.connect(Socket.java:529) at org.jnp.interfaces.TimedSocketFactory.createSocket (TimedSocketFactory.java:97) at org.jnp.interfaces.TimedSocketFactory.createSocket (TimedSocketFactory.java:82) at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:301) ... 5 more

Jboss server is up with port 127.0.0.1:10001 but I trying to hit this url 127.0.0.1:1099 is this ryt?

Server Properties:

  • Address:127.0.0.1
  • port:8080
  • JNDI port:1099

MyCode: These code comprises in a single EJB project

RemoteInterfaceClass:

package com.hex.statelessbean;

import javax.ejb.Remote;

@Remote

public interface StatelessSessionBeanRemote {

    public String displayMessage();
 }

StatelessBean: 

/**
 * Session Bean implementation class StatelessSessionBean
 */

 package com.hex.statelessbean;

 import javax.ejb.Stateless;

@Stateless

public class StatelessSessionBean implements StatelessSessionBeanRemote {

/**
 * Default constructor. 
 */
public StatelessSessionBean() {
    // TODO Auto-generated constructor stub
}

@Override
public String displayMessage() {
    // TODO Auto-generated method stub
    return "Hello world";
}

}

Client:

package com.hex.client;

import java.util.Properties;

import javax.naming.InitialContext;
import javax.naming.NamingException;

import com.hex.statelessbean.StatelessSessionBeanRemote;

public class EjbClientApplication {

public static void main(String[] args) {
    try {
    Properties props = new Properties();
    props.setProperty("java.naming.factory.initial",
    "org.jnp.interfaces.NamingContextFactory");
    props.setProperty("java.naming.factory.url.pkgs",
    "org.jboss.naming");
    props.setProperty("java.naming.provider.url", "localhost:1099");

    InitialContext ctx = new InitialContext(props);
    StatelessSessionBeanRemote bean = (StatelessSessionBeanRemote) ctx
    .lookup("StatelessSessionBean/remote");
    System.out.println("Message from Bean :" + bean.displayMessage());
    } catch (NamingException e) {
    e.printStackTrace();
    }

    }
}
2
javajakarta-eejboss

2 Answers

0
votes

Change localhost:1099 to jnp://localhost:1099 and org.jboss.naming to org.jboss.naming:org.jnp.interfaces and check the name of the ejb. With the annotation @RemoteBinding can you give a name for the ejb. Do you have a port offset?

0
votes
    Corrected Code:

    **Interface class:**


    package com.hex.statelessbean;

    import javax.ejb.Remote;

    @Remote
    public interface StatelessSessionBeanRemote {

        public String displayMessage();
    }


    **Stateless Bean class:**

    package com.hex.statelessbean;

    import javax.ejb.Stateless;

    /**
     * Session Bean implementation class StatelessSessionBean
     */
    @Stateless
    public class StatelessSessionBean implements StatelessSessionBeanRemote {

        /**
         * Default constructor. 
         */
        public StatelessSessionBean() {
            // TODO Auto-generated constructor stub
            System.out.println("************* Calling from Default constructor ******************");
        }

        @Override
        public String displayMessage() {
            // TODO Auto-generated method stub
            System.out.println("************* Calling from displayMessage() ******************");
            return "Hello world";
        }

    }


**Client class:**


package com.hex.client;

import java.util.Properties;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;

import com.hex.statelessbean.StatelessSessionBeanRemote;

public class EjbClientApplication {

    /**
     * @param args
     * @throws NamingException
     */

    public static void main(String[] args) {
        try {
            Properties properties = new Properties();
            properties.setProperty("java.naming.factory.initial",
                    "org.jnp.interfaces.NamingContextFactory");
            properties.setProperty("java.naming.factory.url.pkgs",
                    "org.jboss.naming:org.jnp.interfaces");
            properties.setProperty("java.naming.provider.url",
                    "jnp://localhost:1099");
        InitialContext ctx = new InitialContext(properties);
        StatelessSessionBeanRemote bean = (StatelessSessionBeanRemote) ctx
        .lookup("StatelessSessionBean/remote");
        System.out.println("Message from Bean :" + bean.displayMessage());
        } catch (NamingException e) {
        e.printStackTrace();
        }
        }
}


**LookUp:**

Message from Bean :Hello world