[jboss-user] [EJB/JBoss] - PersistentObjectException - Help me !!!

[Sukar1205]

I been trying to solve this problem for a couple of days now and no luck!
a little help would be appreciated. THanks
I am getting this Exception every time I run my client.

This is my main class

  | 
  |  public static void main(String[] args) {
  |         
  |         KBClient c = new KBClient();
  |         ClassificationRemote r = c.lookupNewClassificationBean();
  |         //Setting and Adding project
  |         KnowledgeBase first = new KnowledgeBase();
  |         Project p = new Project(8);
  |         p.setProjectName("Test Project");
  |         p.setDescription("testing");
  |         first.setKnowledgeID(200);
  |         first.setKnowledgeName("Demo");
  |         first.setKnowledgeCategory("Classification");
  |         first.setProjectID(p);
  |         r.addProject(p);
  |         r.addKnowledgeBase(first);
  |     }
  | 
  |     private ClassificationRemote lookupNewClassificationBean() {
  |         try {
  |             Hashtable props = new Hashtable();
  |             props.put("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
  |             props.put("java.naming.factory.url.pkgs", "org.jboss.naming:org.jnp.interfaces");
  |             props.put("java.naming.provider.url", "localhost");
  |             Context c = new InitialContext(props);
  |             return (ClassificationRemote) c.lookup("ClassificationBeanFinal/remote");
  |         }
  |         catch(NamingException ne) {
  |             System.out.println("here!");
  |             Logger.getLogger(getClass().getName()).log(Level.SEVERE,"exception caught" ,ne);
  |             throw new RuntimeException(ne);
  |         }
  |     }
  | 

This is the function in my session bean class

  | public void addKnowledgeBase(KnowledgeBase kb){
  |         KnowledgeBase temp = em.find(KnowledgeBase.class, kb.getKnowledgeID());
  |         if(temp == null){
  |             em.persist(kb);
  |             em.flush();
  |         }
  |     }
  | 

This is the Exception

  | Exception in thread "main" javax.ejb.EJBException: javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: detached entity passed to persist: EntityBean.Project
  |         at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:63)
  |         at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
  |         at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)
  |         at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |         at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
  |         at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |         at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
  |         at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |         at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
  |         at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:106)
  |         at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |         at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
  |         at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |         at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
  |         at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |         at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:278)
  |         at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
  |         at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
  |         at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:734)
  |         at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:560)
  |         at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:369)
  |         at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:165)
  | Caused by: javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: detached entity passed to persist: EntityBean.Project
  |         at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:629)
  |         at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:218)
  |         at org.jboss.ejb3.entity.TransactionScopedEntityManager.persist(TransactionScopedEntityManager.java:182)
  | 
  | 
Thanks for the HELP

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