Javax.naming.NameNotFoundException: buslogic.HRAppFacade not found, help!!!

Question

I have followed the tutorial on http://www.oracle.com/technology/obe/obe1013jdev/10131/10131_ejb_30/ejb_30.htm to create my own EJB with Jdeveloper, but I got some errors. Please help.
When I run the client, it gave out the following errors:
javax.naming.NameNotFoundException: buslogic.HRAppFacade not found
     at com.evermind.server.rmi.RMIClientContext.lookup(RMIClientContext.java:52)
     at javax.naming.InitialContext.lookup(InitialContext.java:351)
     at client.HRAppFacadeClient.main(HRAppFacadeClient.java:15)
Process exited with exit code 0.
I have created the entity and facade (with interface), but the client couldn't lookup the facade, giving out the above error. How to solve the problm? Thanks.
The following is my source code:
Employees.java
package buslogic.persistence;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.NamedQuery;
import javax.persistence.Table;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
@Entity
@NamedQueries({
@NamedQuery(name = "Employees.findAll", query = "select o from Employees o"),
@NamedQuery(name = "Employees.findEmployeeById", query = "select o from Employees o where o.empid = :empid")
@Table(name = "\"employees\"")
public class Employees implements Serializable {
@Id
@Column(name="empid")
private int empid;
@Column(name="name")
private String name;
@Column(name="phone")
private int phone;
public Employees() {
public int getEmpid() {
return empid;
public void setEmpid(int empid) {
this.empid = empid;
public String getName() {
return name;
public void setName(String name) {
this.name = name;
public int getPhone() {
return phone;
public void setPhone(int phone) {
this.phone = phone;
(HRAppFacadeBean.java)
package buslogic;
import buslogic.persistence.Employees;
import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Stateless(name="HRAppFacade")
public class HRAppFacadeBean implements HRAppFacade, HRAppFacadeLocal {
@PersistenceContext(unitName="EJB_Project")
private EntityManager em;
public HRAppFacadeBean() {
public Object mergeEntity(Object entity) {
return em.merge(entity);
public Object persistEntity(Object entity) {
em.persist(entity);
return entity;
/** <code>select o from Employees o</code> */
public List<Employees> queryEmployeesFindAll() {
return em.createNamedQuery("Employees.findAll").getResultList();
/** <code>select o from Employees o where o.empid = :empid</code> */
public Employees queryEmployeesFindEmployeeById(int empid) {
return (Employees)em.createNamedQuery("Employees.findEmployeeById").setParameter("empid", empid).getSingleResult();
public void removeEmployees(Employees employees) {
employees = em.find(Employees.class, employees.getEmpid());
em.remove(employees);
(HRAppFacade.java)
package buslogic;
import buslogic.persistence.Employees;
import java.util.List;
import javax.ejb.Remote;
@Remote
public interface HRAppFacade {
Object mergeEntity(Object entity);
Object persistEntity(Object entity);
List<Employees> queryEmployeesFindAll();
Employees queryEmployeesFindEmployeeById(int empid);
void removeEmployees(Employees employees);
(HRAppFacadeLocal.java)
package buslogic;
import buslogic.persistence.Employees;
import java.util.List;
import javax.ejb.Local;
@Local
public interface HRAppFacadeLocal {
Object mergeEntity(Object entity);
Object persistEntity(Object entity);
List<Employees> queryEmployeesFindAll();
Employees queryEmployeesFindEmployeeById(int empid);
void removeEmployees(Employees employees);
}

Answer 1

I hit the exact same error. In my case it was due to missing "@Id" line in Departments.java. I must have accidently deleted it when pasting in some code.
(my clue was the errors I got when starting imbedded OC4J)
This section of Departments.java should read as follows:
public class Departments implements Serializable {
@Id
@GeneratedValue(strategy=SEQUENCE, generator="DEPARTMENTS_SEQ")
@Column(name="DEPARTMENT_ID", nullable = false)
After fixing this, I ran a "make" of "HRApp", restarted the embedded OC4J server (terminate it, then right click HRAppFacadeBean.java, and click Run).
Then ran the application...