Regarding stateless bean create() method problem

hi every body,
I am Learning EJB now for this i created one StatelessBean with a eho functionality with jsp. it is working good for the first time but when i am trying to run that jsp once again it shows the following error in server console
11:32:13,090 ERROR [LogInterceptor] EJBException in method: public abstract beans.StatelessRemote beans.StatelessHome.create() throws javax.ejb.CreateException,java.rmi.RemoteException:
javax.ejb.EJBException: Invalid invocation, check your deployment packaging, method=public abstract beans.StatelessRemote beans.StatelessHome.create() throws javax.ejb.CreateException,java.rmi.RemoteException
i am using Netbeans and J2EE 1.4 version and using Jboss 4.2.2.GA
please help me in this regard
yours,
-sat-

Bean :::::::::::::
package beans;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
public class StatelessBean implements SessionBean {
SessionContext context;
// The public business method. This must be coded in the
// remote interface also.
public String getEchoString(String clientString) {
return (clientString.toUpperCase() + " - from session bean");
// Standard ejb methods
public void ejbActivate() {
System.out.println("ejb activate called");}
public void ejbPassivate() {
System.out.println("ejb passivate called");}
public void ejbRemove() {
System.out.println("ejb remove called");}
public void ejbCreate() {
System.out.println("ejb create called");}
public void setSessionContext(SessionContext context) {
System.out.println("setSessionContext called");
this.context=context;
Home interface::::::::::::::::::::::::::
package beans;
import java.rmi.RemoteException;
import javax.ejb.EJBHome;
import javax.ejb.CreateException;
public interface StatelessHome extends EJBHome {
// The create() method for the SimpleSession bean
public StatelessRemote create()
throws CreateException, RemoteException;
Remote interface::::::::::::
package beans;
import java.rmi.RemoteException;
import javax.ejb.EJBObject;
public interface StatelessRemote extends EJBObject {
// The public business method on the SimpleSession bean
public String getEchoString(String clientString)
throws RemoteException;
client ie.. index.jsp
<%@ page import="java.util.*,java.io.*,java.lang.*" %>
<%@ page import="beans.*,javax.naming.InitialContext,javax.naming.Context,javax.rmi.PortableRemoteObject" %>
<%--
Document : index
Created on : Dec 2, 2008, 11:33:10 AM
Author : sathish.kumar
--%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<%
Properties pro=new Properties();
StatelessHome home;
StatelessRemote simpleSession;
String result=new String();
try {
// Get a naming context
pro.put(Context.INITIAL_CONTEXT_FACTORY,"org.jnp.interfaces.NamingContextFactory");
pro.put(Context.URL_PKG_PREFIXES,"org.jboss.naming:org.jnp.interfaces");
pro.put(Context.PROVIDER_URL,"localhost:1099");
InitialContext JContext = new InitialContext(pro);
System.out.println("context::::::::::::::>"+JContext);
// Get a reference to the SimpleSession JNDI entry
Object ref =JContext.lookup("StatelessBean");
// Get a reference from this to the Bean's Home interface
home = (StatelessHome)PortableRemoteObject.narrow(ref, StatelessHome.class);
// Create a SimpleSession object from the Home interface
simpleSession = home.create();
// Loop through the words
for (int i = 0; i < 10; i++) {
String returnedString = simpleSession.getEchoString("hello"+i+"::>>");
System.out.println("sent string: " +"hello"+i+"::>>" +
", received string: " + returnedString);
result+=returnedString;
} catch(Exception e) {
e.printStackTrace();
%><form name="my" method=post>
<h2>Hello World!<hr><br><%= result%><hr></h2></form>
</body>
</html>

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     pstmgetProgramaPP = null;
     pstmgetProgramaParo = null;
     pstmgetPrograma = null;
public void GenerarSimulacion(int pidSimulacion, String pfini, String pffin, int cveEntidad, int cveUsuario) throws Exception{
System.out.println("GenerarSimulacion()");
System.out.println("***Simulacion " + pidSimulacion + " en proceso...***");
Calendar inicioProceso = Calendar.getInstance();//Tiempo en que empezo el Proceso
Calendar finProceso = null;//Tiempo en que termino el Proceso
     Connection cnn = null;
//boolean autoCommit = false;
     try{
     cnn = ds.getConnection();
autoCommit = cnn.getAutoCommit();
cnn.setAutoCommit(false);
     cnn.setTransactionIsolation(Connection.TRANSACTION_READ_UNCOMMITTED);
pstmSelectSerial = cnn.prepareStatement("select iValor from CatConsecutivo where vcConsecutivo=?");
pstmUpdateSerial = cnn.prepareStatement("update CatConsecutivo set iValor = iValor+1 where vcConsecutivo=?");
pstmgetPPEquipos = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.getPPEquipos"));
pstmgetTransfers = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.getTransfers"));
pstmaddRProduccion = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.addRProduccion"));
pstmupdInventario = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.updInventario"));
pstmgetServicios = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.getServicios"));
pstmaddConsumo = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.addRConsumo"));
pstmgetAreaEquipos = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.getAreaEquipos"));
pstmfindCE = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.findCE"));
pstmcontEventoLogEq = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.contEventoLogEq"));
pstmaddLog = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.addLog"));
pstmfindCaract = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.findCaract"));
pstmfindComposicion = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.findComposicion"));
pstmfindCombAlt = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.findCombAlt"));
pstmaddInventarioH = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.addInventarioH"));
pstmgetAlmMatREM = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.getAlmMatREM"));
pstmfindAlmacen = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.findAlmacen"));
pstmcontEventoLogAlm = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.contEventoLogAlm"));
pstmgetAlmacenes = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.getAlmacenes"));
pstmfindInvHora = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.findInvHora"));
pstmgetPeriodoHorario = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.getPeriodoHorario"));
pstmgetProgramaCE = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.getProgramaCE"));
pstmgetProgramaPP = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.getProgramaPP"));
pstmgetProgramaParo = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.getProgramaParo"));
pstmgetPrograma = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.getPrograma"));
pstmgetAreaEquipos = cnn.prepareStatement(Manager.getParameter("cmx.admin.inicioSesion.getAreaEquipos"));
Map hmEqMat = null;
Iterator itEqMat = null;
Map.Entry meEqMat = null;
Map hmInvAlm = null;
Iterator itInvAlm = null;
Map.Entry meInvAlm = null;
Map hmPunta = null;
Iterator itPunta = null;
Map.Entry mePunta = null;
Iterator itPuntaEq = null;
HashMap hmPuntaEq = null;
Vector vecPuntaEq = null;
Iterator itPPEq = null;
HashMap hmPPEq = null;
Vector vecPPEq = null;
Iterator itCar = null;
HashMap hmCar = null;
Vector vecCar = null;
Iterator itLog = null;
HashMap hmLog = null;
Vector vecLog = null;
Iterator itCA = null;
HashMap hmCA = null;
Vector vecCA = null;
Iterator itCom = null;
HashMap hmCom = null;
Vector vecCom = null;
Iterator it = null;
HashMap hm = null;
Vector vecEv = null;
Iterator itEq = null;
HashMap hmEq = null;
Vector vecEq = null;
Vector vecSim = null;
Date d;
String sDSim = "";
Date dDiaPrevio;
String sDiaPrevio = "";
String consulta;
int vContador= 0;
int hr=0;
long vDiaPrevio = 0;
Integer idInvH;
Integer idProd;
Integer idCons;
Integer idLog;
int vCont = 0;
int vCiclo = 0;
int vArea = 0;
int vAreaAct = 0;
int vPuntaEquipo = 0;
// Periodo de Simulacion
long fini = getCurrDate(pfini);
long ffin = getCurrDate(pffin);
// Variables Generales
int vSecuencial = 0;
int vEvento = 0;
float vCostoE = 0;
int vAlmacenREM = 0;
// Variables de Transferencia
float vCantidad = 0;
int vTipoMov = 0;
int vUMedida = 0;
int vAlmacenTr = 0;
float vNIni = 0;
float vNMin = 0;
float vNMax = 0;
float vNAct = 0;
// Variables de Equipos
int vPPMaterial = 0;
int vPPEquipo = 0;
int vPPArea = 0;
int vMaterial = 0;
int vCaractEq = 0;
int vParo = 0;
int vEstatusParo = 0;
int vEstatus = 0;
float vMinPunta = 0;
float vPorcPunta = 0;
float vProporcion = 0;
float vTPH = 0;
float vGasto = 0;
float vKwNoProd = 0;
float vKwProd = 0;
int vAlmacen = 0;
// Variables de Composicion de Materiales
int vMaterialCom = 0;
float vPorcCom = 0;
float vFactorCC = 0;
int vTipoMovCom = 0;
int vUMedidaCom = 0;
int vAlmacenCom = 0;
float vNIniCom = 0;
float vNMinCom = 0;
float vNMaxCom = 0;
float vNActCom = 0;
int vMaterialCA = 0;
int vUMedidaCA = 0;
int vAlmacenCA = 0;
float vNIniCA = 0;
float vNMinCA = 0;
float vNMaxCA = 0;
float vNActCA = 0;
int vOk=0;
int h=0;
boolean vbOk=false;
boolean swArea=true;
Calendar dtH1;
vecSim = new Vector();
vecSim.add(new Integer(pidSimulacion));
for (long ld=fini; ld<=ffin; ld=getNextDate(new Date(ld), 1))
{   d = new Date(ld);
//The process which calls find(), upd(), AplicaEvento() and GetCostoEnergia() methods several times.
//The methods find() and upd() uses a util class (DataDB) which basically assigns the params to the PreparedStatement and executes it, returning the results in a Vector.
} // for ld : Dia de Simulacion
//Cerrar la transaccion
}catch (Exception e){
          System.out.println("rollback...");
               mySessionCtx.setRollbackOnly();
     System.out.println("rollback ok!");
System.out.println(e.toString());
               throw e;
}finally{
finProceso = Calendar.getInstance();
finProceso.setTime(new java.util.Date(finProceso.getTime().getTime() - inicioProceso.getTime().getTime()));
System.out.println("***Simulacion " + pidSimulacion + " procesada en: " + finProceso.get(Calendar.MINUTE) + ":" + finProceso.get(Calendar.SECOND) + "." + finProceso.get(Calendar.MILLISECOND) + ".***");
try {
if (cnn!=null && !cnn.isClosed()) {
          System.out.println("close ok?");
cnn.close();
               System.out.println("close ok!");
}catch (SQLException sqle){
sqle.printStackTrace();
System.out.println("commit ok?");
cnn.commit();
System.out.println("commit ok!");
}catch (Exception e){
e.printStackTrace();
System.out.println(e.toString());
try {
if (cnn!=null && !cnn.isClosed()) {
               System.out.println("rollback ok?");
                         cnn.rollback();
          System.out.println("rollback ok!");
}catch (SQLException sqle){
sqle.printStackTrace();
}finally{
finProceso = Calendar.getInstance();
finProceso.setTime(new java.util.Date(finProceso.getTime().getTime() - inicioProceso.getTime().getTime()));
System.out.println("Simulacion procesada en: " + finProceso.get(Calendar.MINUTE) + ":" + finProceso.get(Calendar.SECOND) + "." + finProceso.get(Calendar.MILLISECOND) + ".***");
try {
if (cnn!=null && !cnn.isClosed()) {
               System.out.println("autocommit ok?");
               cnn.setAutoCommit(autoCommit);
          System.out.println("autocommit ok!");
          System.out.println("close ok?");
cnn.close();
               System.out.println("close ok!");
}catch (SQLException sqle){
sqle.printStackTrace();
private float GetCostoEnergia(float pfKw, long plFecha, int piHora,int cveEntidad) throws Exception {
float exito = -1;
//calculations and has access to DB throught method find()
return exito;
private int AplicaEvento(int pidMaterial, int pidEvento, int pidSecuencial, int pidSimulacion, long plFecha, int piHora) throws Exception {
int exito = -1;
//calculations and has access to DB throught method find()
return exito;
private Iterator find(PreparedStatement pstm, Vector values) throws Exception {
params = (values!=null)? values.toArray() : null;
Vector data = DataDB.executeQuery(pstm, params); //This util class is in a external jar file, such util basically assigns the params to the PreparedStatement and executes it, returning the results in a Vector.
return data.iterator();
private int upd(PreparedStatement pstm, Vector values) throws Exception {
params = values.toArray();
return DataDB.executeUpdate(pstm, params); //This util class is in a external jar file, such util basically assigns the params to the PreparedStatement and executes it.
Help will be REALLY appreciated!
Thanks in advance.

Thanks Paul for your comments.
In fact, I call my EJB in the servlet just once. Im sure calling the same EJB. My project requieres it to be stateless.
This is my last log
1/2/03 13:15:00:481 CST] 17fac55b SystemOut U -ejbCreate()-
[1/2/03 13:15:00:591 CST] 17fac55b SystemOut U jdbc/xa/oye
[1/2/03 13:15:00:651 CST] 17fac55b SystemOut U -GenerarSimulacion()-
[1/2/03 13:15:00:741 CST] 17fac55b SystemOut U ***Simulacion 32 en proceso...??***
[1/2/03 13:15:01:012 CST] 17fac55b SystemOut U JSQLConnect(2.2721) Trial license - expires on:Tue Jan 07 13:01:32 CST 2003, unlimited connections
[1/2/03 13:15:01:092 CST] 17fac55b SystemOut U Connection OK!
[1/2/03 13:15:01:392 CST] 17fac55b SystemOut U PreparedStatements OK!
[1/2/03 13:15:01:402 CST] 17fac55b SystemOut U Comenzando Sim...
I forgot to mention that I create a connection (autocommit false) at the begining of my servlet, which I use throught all the servlet, then I call the EJB, and after the EJB succeds I also close the transaction in the Servlet (to commit what is on the servlet, not the EJB). Thats why I set the transaction in the EJB to requiresNew, so after the EJB ends it commits its own transaction, Am I right?.
The Exception I get I think its because the connection used in the servlet timed out while waiting for the EJB to finish.
This issue has become urgent, so please if you know why I have this problem reply ASAP.
Thanks!

Regarding stateless bean create() method problem

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