Asking the same problem the 3rd time

Question

our project is to use j2ee set up a simple portal for a poly. As the tutor required, there must be a entity bean and a session bean. however, I always got the same error message.
the error message from the running shell is like this:
D:\tools\news>runclient -client news.ear -name client -textauth
Initiating login ...
Enter Username:guest
Enter Password:guest123
Binding name:`java:comp/env/ejb/MyClient`
Error getting object: RemoteException occurred in server thread; nested exceptio
n is:
java.rmi.RemoteException: createNews: ejbCreate:xxxxxxx Connection refused to host: 172.16.1.35; nested exception is:
java.net.ConnectException: Connection refused: connect
D:\tools\news>
and the error from the j2ee log file is like this:
Warning: Application should provide username/password for resource reference jdbc/Cloudscape with application authorization
javax.ejb.EJBException: ejbCreate:xxxxxxx Connection refused to host: 172.16.1.34; nested exception is:
     java.net.ConnectException: Connection refused: connect
     at NewsBean.ejbCreate(NewsBean.java:43)
     at NewsBean_LocalHomeImpl.create(NewsBean_LocalHomeImpl.java:72)
     at NewsControllerBean.createNews(NewsControllerBean.java:39)
     at NewsControllerBean_EJBObjectImpl.createNews(NewsControllerBean_EJBObjectImpl.java:302)
     at NewsControllerBeanEJBObjectImpl_Tie._invoke(Unknown Source)
     at com.sun.corba.ee.internal.POA.GenericPOAServerSC.dispatchToServant(GenericPOAServerSC.java:520)
     at com.sun.corba.ee.internal.POA.GenericPOAServerSC.internalDispatch(GenericPOAServerSC.java:210)
     at com.sun.corba.ee.internal.POA.GenericPOAServerSC.dispatch(GenericPOAServerSC.java:112)
     at com.sun.corba.ee.internal.iiop.ORB.process(ORB.java:255)
     at com.sun.corba.ee.internal.iiop.RequestProcessor.process(RequestProcessor.java:84)
     at com.sun.corba.ee.internal.orbutil.ThreadPool$PooledThread.run(ThreadPool.java:99)
javax.ejb.EJBException: createNews: ejbCreate:xxxxxxx Connection refused to host: 172.16.1.34; nested exception is:
     java.net.ConnectException: Connection refused: connect
     at NewsControllerBean.createNews(NewsControllerBean.java:44)
     at NewsControllerBean_EJBObjectImpl.createNews(NewsControllerBean_EJBObjectImpl.java:302)
     at NewsControllerBeanEJBObjectImpl_Tie._invoke(Unknown Source)
     at com.sun.corba.ee.internal.POA.GenericPOAServerSC.dispatchToServant(GenericPOAServerSC.java:520)
     at com.sun.corba.ee.internal.POA.GenericPOAServerSC.internalDispatch(GenericPOAServerSC.java:210)
     at com.sun.corba.ee.internal.POA.GenericPOAServerSC.dispatch(GenericPOAServerSC.java:112)
     at com.sun.corba.ee.internal.iiop.ORB.process(ORB.java:255)
     at com.sun.corba.ee.internal.iiop.RequestProcessor.process(RequestProcessor.java:84)
     at com.sun.corba.ee.internal.orbutil.ThreadPool$PooledThread.run(ThreadPool.java:99)
java.rmi.RemoteException: createNews: ejbCreate:xxxxxxx Connection refused to host: 172.16.1.34; nested exception is:
     java.net.ConnectException: Connection refused: connect
     at com.sun.enterprise.iiop.POAProtocolMgr.mapException(POAProtocolMgr.java:389)
     at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:431)
     at NewsControllerBean_EJBObjectImpl.createNews(NewsControllerBean_EJBObjectImpl.java:306)
     at NewsControllerBeanEJBObjectImpl_Tie._invoke(Unknown Source)
     at com.sun.corba.ee.internal.POA.GenericPOAServerSC.dispatchToServant(GenericPOAServerSC.java:520)
     at com.sun.corba.ee.internal.POA.GenericPOAServerSC.internalDispatch(GenericPOAServerSC.java:210)
     at com.sun.corba.ee.internal.POA.GenericPOAServerSC.dispatch(GenericPOAServerSC.java:112)
     at com.sun.corba.ee.internal.iiop.ORB.process(ORB.java:255)
     at com.sun.corba.ee.internal.iiop.RequestProcessor.process(RequestProcessor.java:84)
     at com.sun.corba.ee.internal.orbutil.ThreadPool$PooledThread.run(ThreadPool.java:99)
I created an entity bean as following:
import java.sql.*;
import javax.sql.*;
import java.util.*;
import java.math.*;
import javax.ejb.*;
import javax.naming.*;
import java.util.*;
import java.util.Date;
//import news.Helper;
public class NewsBean implements EntityBean
     private String title;
     private String type;
     private String content;
     private Date date;
private String newsId;
private EntityContext context;
private Connection con;
//     private Helper helper;
//     private EntityContext context;
     private String dbName = "java:comp/env/jdbc/newsDB";
     public String ejbCreate(String title, String content, String type, Date date) throws CreateException
          if(content == null)
               throw new CreateException("content cannot be empty");
          this.title = title;
          this.content = content;
          this.type = type;
          this.date = date;
          this.newsId = Helper.getNewsId(date);
          System.out.println("ccccc" + newsId + "ddddddd");
          try
          System.out.println("jian ren xu jia");
               insertRow();
               System.out.println("wu xia xiao shuo");
          catch (Exception ex)
               throw new EJBException ("ejbCreate:xxxxxxx " + ex.getMessage());
          System.out.println("aiiiiiiiiiiiiiiiiiiiiiii!");
          return newsId;
     public String ejbCreate(String title, String content) throws CreateException
          if(content == null)
               throw new CreateException("content cannot be empty");
          try
               insertRow();
          catch (Exception ex)
               throw new EJBException ("ejbCreate: " + ex.getMessage());
          this.title = title;
          this.content = content;
          this.type = "default";
          this.date = new Date();
          this.newsId = Helper.getNewsId(date);
          return newsId;
     public void ejbRemove()
          try
               deleteRow(newsId);
          catch(Exception ex)
               throw new EJBException("ejbRemove: " + ex.getMessage());
     public void ejbLoad()
          try
               loadRow();
          catch(Exception ex)
               throw new EJBException("ejbLoad: "+ ex.getMessage());
     public void ejbStore()
          try
               storeRow();
          catch(Exception ex)
               throw new EJBException ("ejbStore: " + ex.getMessage());
public void ejbPassivate() {}
public void ejbPostCreate (String title, String content, String type, Date date) throws CreateException{}
public void ejbPostCreate(String title, String content) throws CreateException {}
public void ejbActivate() {}
public void unsetEntityContext() {context = null;}
public void setEntityContext(javax.ejb.EntityContext context)
     this.context = context;
     public Collection ejbFindInRage(String start, String end)
          Collection result;
          try
               result = selectInRange(start, end);
          catch(Exception ex)
               throw new EJBException ("ejbFindInRange: " + ex.getMessage());
          return result;
     public String ejbFindByPrimaryKey(String primary) throws ObjectNotFoundException, FinderException
          boolean result;
          try
               result = selectByPrimaryKey(primary);
          catch(Exception ex)
               throw new EJBException("ejbFindByPrimaryKey: " + ex.getMessage());
          if(result)
               return primary;
          else
               throw new FinderException("Row for id " + primary + " not found.");
     public String ejbFindByTitle(String tt) throws ObjectNotFoundException,FinderException
          boolean result;
          try
               result = selectByTitle(tt);
          catch(Exception ex)
               throw new EJBException ("ejbFindByTitle: " + ex.getMessage());
          if(result)
               return tt;
          else
               throw new FinderException("Row for title " + tt + " not found.");
     public void setContent (String content)
          this.content = content;
     public void setDate(Date date)
          this.date = date;
     public void setTitle (String t)
          this.title = t;
     public void setType(String t)
          this.type = t;
     public String getTitle()
          return title;
     public String getContent()
          return content;
     public String getType ()
          return type;
     public Date getDate()
          return date;
     public String getNewsId()
          return newsId;
/**************************************Database Routines***********************************/
     private void makeConnection()
          try
               InitialContext ic = new InitialContext();
               DataSource ds = (DataSource)ic.lookup(dbName);
               con = ds.getConnection();
          catch(Exception ex)
               throw new EJBException ("Unable to connect to database." + ex.getMessage());
     private void releaseConnection() throws SQLException
          try
          if(con != null)
               con.close();
          catch(SQLException ex)
          throw new RuntimeException ("cannot close DataBase connection:\n"
               + ex.getMessage());
          catch(Exception ex)
               throw new EJBException("releaseConnection." + ex.getMessage());
     private void closeStatement(PreparedStatement ps) throws RuntimeException
     try
          if(ps != null)
          ps.close();
     catch(SQLException ex)
          throw new RuntimeException("cannot close sql statement:\n" + ex.getMessage());
     private void closeResultSet(ResultSet rs) throws RuntimeException
     try
          if(rs != null)
          rs.close();
     catch(SQLException ex)
          throw new RuntimeException("cannot close sql ResultSet:\n" + ex.getMessage());
     private void insertRow() throws SQLException
     System.out.println("iiiiiisert");
          makeConnection();
          String insertStatement =
               "insert into news values (?,?,?,?,?)";
          PreparedStatement prep = con.prepareStatement(insertStatement);
          prep.setString(1,newsId);
          prep.setString(2,title);
          prep.setString(3,content);
          prep.setString(4,type);
          prep.setDate(5,new java.sql.Date(date.getTime()));
          prep.executeUpdate();
          closeStatement(prep);
          releaseConnection();
          System.out.println("insert ended!!!!!!!!");          
     private void deleteRow(String id) throws SQLException
          makeConnection();
          String delString = "delete from news where news_id = ?";
          PreparedStatement prep = con.prepareStatement(delString);
          prep.setString(1,id);
          prep.executeUpdate();
          prep.close();
          releaseConnection();
     private boolean selectByPrimaryKey(String pk) throws SQLException
          makeConnection();
          String selString = "select news_id from news where news_id = ?";
          PreparedStatement prep = con.prepareStatement(selString);
          prep.setString(1,pk);
          ResultSet rs = prep.executeQuery();
          boolean result = rs.next();
          prep.close();
          releaseConnection();
          return result;
     private boolean selectByTitle(String tt) throws SQLException
          makeConnection();
          String selString = "select news_id from news where news_id = ?";
          PreparedStatement prep = con.prepareStatement(selString);
          prep.setString(1,tt);
          ResultSet rs = prep.executeQuery();
          boolean result = rs.next();
          prep.close();
          releaseConnection();
          return result;
     private void loadRow() throws SQLException
          makeConnection();
          String selString = "select title, content, type,"
          + "date from news where news_id =?";
          PreparedStatement prep = con.prepareStatement(selString);
          prep.setString(1,newsId);
          ResultSet rs = prep.executeQuery();
          if(rs.next())
               title = rs.getString(2);
               content = rs.getString(3);
               type = rs.getString(4);
               date = rs.getDate(5);
               prep.close();
               releaseConnection();
          else
               prep.close();
               releaseConnection();
               throw new NoSuchEntityException("row for id " + newsId + " not found "
                         + " in the database.");
     private void storeRow () throws SQLException
          makeConnection();
          String upString = "update news set newsId = ?,title = ?, content = ?, type = ?, "
               + " date = ? where news_id = newsId";
          PreparedStatement prep = con.prepareStatement(upString);
          prep.setString(1,newsId);
          prep.setString(2,title);
          prep.setString(3,content);
          prep.setString(4,type);
          prep.setDate(5,new java.sql.Date(date.getTime()));
          int rowCount = prep.executeUpdate();
          prep.close();
          releaseConnection();
          if(rowCount == 0)
               throw new EJBException ("Storing row for newsId " + newsId + " failed.");
class Helper
     public static String getNewsId(Date date)
          GregorianCalendar calendar = new GregorianCalendar();
          calendar.setTime(date);
          String ss = "" + calendar.get(Calendar.YEAR) + calendar.get(Calendar.MONTH)
               + calendar.get(Calendar.DATE) + calendar.get(Calendar.HOUR) +
               calendar.get(Calendar.MINUTE) + calendar.get(Calendar.SECOND);
          System.out.println("this is: " + ss + "xxxxxx");
          return ss;
and a session bean like this:
import java.sql.*;
import javax.sql.*;
import java.util.*;
import java.math.*;
import javax.ejb.*;
import javax.naming.*;
import java.rmi.RemoteException;
import java.util.Date;
import javax.rmi.PortableRemoteObject;
public class NewsControllerBean implements SessionBean
private NewsLocalHome newsHome;
private NewsLocal news;
private Date date;
private String title;
private String newsId;
private String content;
public String createNews(String title, String content, String type,Date date) throws NewsNotFoundException, InvalidParameterException
     if(title == null)
          throw new InvalidParameterException("title null");
     else this.title = title;
     if(content == null)
          throw new InvalidParameterException("content null");
     if(type == null)
          type = "default";
     if(date == null)
          date = new Date();
     try
          System.out.println("ta ma de, NewsControllerBean");
          news = newsHome.create(title,content,type,date);
          System.out.println("ta nn de, NewsControllerBean");
     catch (Exception ex)
          throw new EJBException("createNews: " + ex.getMessage());
     try
               newsId = getNewsId();
     catch(Exception ex)
          throw new EJBException("gettingNewsId: " + ex.getMessage());
     // return, maybe not right.
     return title;
public void removeNews(String newsId) throws NewsNotFoundException, InvalidParameterException
     if(newsId == null)
          throw new InvalidParameterException("null newsId" );
     if(newsExists(newsId) == false)
          throw new NewsNotFoundException(newsId);
     try
          news.remove();
     catch (Exception ex)
          throw new EJBException("removeNews: " + ex.getMessage());
public void ejbCreate() {
try {
     System.out.println("define by me: error in controller");
InitialContext initial = new InitialContext();
Object objref = initial.lookup("java:comp/env/ejb/NewsManager");
System.out.println("hannnnnnnnn");
newsHome = (NewsLocalHome)PortableRemoteObject.narrow(objref, NewsLocalHome.class);
     System.out.println("xu jia jian ren");
} catch (Exception ex) {
throw new EJBException("ejbCreate: " +
ex.getMessage());
} // ejbCreate
public NewsControllerBean() {}
public void ejbRemove() {}
public void ejbActivate() {}
public void ejbPassivate() {}
public void setSessionContext(SessionContext sc) {}
public String getTitle()
     String title;
try {
title= news.getTitle();
} catch (Exception ex) {
throw new EJBException("getTitle: "
+ ex.getMessage());
     return title;
public String getContent()
     String content;
try {
content = news.getContent();
} catch (Exception ex) {
throw new EJBException("getContent: "
+ ex.getMessage());
     return content;
public String getType()
     String type;
try {
type = news.getType();
} catch (Exception ex) {
throw new EJBException("getType: "
+ ex.getMessage());
     return type;
public Date getDate()
     Date date;
try {
date = news.getDate();
} catch (Exception ex) {
throw new EJBException("getDate: "
+ ex.getMessage());
     return date;
public String getNewsId()
     String id;
try {
id = news.getNewsId();
} catch (Exception ex) {
throw new EJBException("getNewsId: "
+ ex.getMessage());
     return id;
public void setTitle(String title) throws NewsNotFoundException, InvalidParameterException
     if(title == null)
          throw new InvalidParameterException("null title");
     if(newsExists(this.newsId) == false)
          throw new NewsNotFoundException(newsId);
     try
          news.setTitle(title);
     catch(Exception ex)
          throw new EJBException("setTitle: " + ex.getMessage());
public void setContent(String content) throws NewsNotFoundException, InvalidParameterException
     if(content == null)
          throw new InvalidParameterException("null content");
     if(newsExists(this.newsId) == false)
          throw new NewsNotFoundException(newsId);
     try
          news.setContent(content);
     catch(Exception ex)
          throw new EJBException("setContent: " + ex.getMessage());
public void setType(String type) throws NewsNotFoundException, InvalidParameterException
     if(type == null)
          throw new InvalidParameterException("null type");
     if(newsExists(this.newsId) == false)
          throw new NewsNotFoundException(newsId);
     try
          news.setType(type);
     catch(Exception ex)
          throw new EJBException("setType: " + ex.getMessage());
public void setDate(Date date) throws NewsNotFoundException, InvalidParameterException
     if(date == null)
          throw new InvalidParameterException("null date");
     if(newsExists(this.newsId) == false)
          throw new NewsNotFoundException(newsId);
     try
          news.setDate(date);
     catch(Exception ex)
          throw new EJBException("setDate: " + ex.getMessage());
private boolean newsExists(String newsId) {
// If a business method has been invoked with
// a different accountId, then find the new
// accountId and update the accountId and account
// variables. Return false if the account
// cannot be found.
try {
newsHome.findByPrimaryKey(newsId);
} catch (Exception ex) {
return false;
return true;
} // sreamExists
can someone give me some guide?

Answer 1

You must be using j2ee 1.3. Use Container authentication and set the username and password via deploytool for the JNDI entry for cloudscape.
If you must you User Auth, you should specify the user/password via getConnection.