Problem org.hibernate.PersistentObjectException: detached en

[gianfeng]

Hello, please see my persistent classes below:
1-User.java

package com.liefallow.member.entiy;

import java.io.Serializable;

import javax.persistence.*;

@Entity
@Table(name = "user")
public class User implements Serializable {

 private static final long serialVersionUID = -4063362489253613429L;

 private int userId;

 private String userName;

 //Other variables

 public User() {
 }

 @Id(generate = GeneratorType.AUTO)
 @Column(name = "userId")
 public int getUserId() {
 return userId;
 }

 /**
 * @param userId
 * The userId to set.
 */
 public void setUserId(int userId) {
 this.userId = userId;
 }


 /**
 * @return Returns the userName.
 */
 public String getUserName() {
 return userName;
 }

 /**
 * @param userName
 * The userName to set.
 */
 public void setUserName(String userName) {
 this.userName = userName;
 }

 //other getter and setter methods


}

2-RemoteOperate.java

import javax.ejb.Remote;

import com.liefallow.member.entiy.User;

@Remote
public interface RemoteOperate {

 public void addUser(User user);

}

3-OperateBean.java

@Stateless
@Local( { Operate.class })
@Remote( { RemoteOperate.class })
public class OperateBean implements Operate, RemoteOperate {

 @PersistenceContext(unitName = "opt")
 protected EntityManager em;

 public void addUser(User user) {
 em.persist(user);
 }

4-Test.java

public class Test {

 @SuppressWarnings("unchecked")
 public static void main(String[] args) {

 Hashtable env = new Hashtable();
 env.put("java.naming.factory.initial",
 "org.jnp.interfaces.NamingContextFactory");
 env.put("java.naming.factory.url.pkgs",
 "org.jboss.naming:org.jnp.interfaces");
 env.put("java.naming.provider.url", "jnp://localhost:1099");

 RemoteOperate opt = null;
 try {
 InitialContext ctx = new InitialContext(env);
 System.out.println(RemoteOperate.class.getName());
 opt = (RemoteOperate) ctx.lookup(RemoteOperate.class.getName());
 } catch (NamingException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }

 User user = new User();
 user.setUserId(1);
 user.setUserName("gianfeng");
 user.setPasswd("123456");
 user.setRegTime("2005-09-14");
 user.setEmail("[e-mail]");
 user.setRegIp("127.0.0.1");
 user.setSex("?");

 opt.addUser(user);

 System.out.println("ss");
 }

}

I get the exception :

2005-09-15 13:46:11,342 INFO [STDOUT] org.hibernate.PersistentObjectException: detached entity passed to persist: com.liefallow.member.entiy.User
 at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:79)
 at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:38)
 at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:531)
 at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:129)
 at org.jboss.ejb3.entity.InjectedEntityManager.persist(InjectedEntityManager.java:92)
 at com.liefallow.member.service.OperateBean.addUser(OperateBean.java:20)
 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:585)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:99)
 at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:33)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:88)
 at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:66)
 at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:134)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:88)
 at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:72)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:88)
 at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:39)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:88)
 at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:63)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:88)
 at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:93)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:88)
 at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:183)
 at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:107)
 at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:69)
 at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:325)
 at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:201)
 at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:259)
 at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:313)
 at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:147)

Can you suggect the way to solver this problem?thanks.

[epbernard]

passing or cascading detached entity to the persist operation is not allowed

[r_q_d]

You get the error of "detached entity passed to persist" because you define the Id to be generated by the system (i.e. @Id(generate = GeneratorType.AUTO)) , but when you create it, I passed a id to it (user.setUserId(1)).

either take the "generate = GeneratorType.AUTO" off or don't assign id when create a new entity.