PLEASE HELP! Tomcat and Hibernate ServletException, net/sf/cglib/core/KeyFactory problem

From: Tung Chau (tungchau81_at_yahoo.com)
Date: 08/20/04 

Date: 19 Aug 2004 21:19:39 -0700

Hi,
I am newbie to Hibernate. I followed the instructions on the following
page to configure Tomcat to work with Hibernate.
http://www.hibernate.org/hib_docs/reference/en/html/quickstart.html
I tested hibernate with a simple Employee table and Employee.hbm.xml
===================================================================
My /src directory has
hibernate.cfg.xml at the root.
HibernateUtil.java inside package proj.db.
Employee.java inside package proj.mapping.
Employee.hbm.xml inside package proj.mapping.
==================================================================
The following code is put in test.jsp to test hibernate
"try{
Session s = HibernateUtil.currentSession();

Transaction tx= s.beginTransaction();

Employee E = new Employee();
E.setFirstName("blue");
E.setLastName("blue");
E.setEmail("blue@gmail.com");

s.save(E);
tx.commit();

HibernateUtil.closeSession();
}catch (Exception e) {
  out.println(e.getMessage());
}"
================================================
package proj.db;

import net.sf.hibernate.*;
import net.sf.hibernate.cfg.*;

public class HibernateUtil {

    //private static Log log = LogFactory.getLog(HibernateUtil.class);

    private static final SessionFactory sessionFactory;

    static {
        try {
            // Create the SessionFactory
            Configuration conf= new Configuration()
            .addClass(elearning.mapping.Employee.class);
            //sessionFactory = new
Configuration().configure().buildSessionFactory();
            sessionFactory = conf.buildSessionFactory();
        } catch (Throwable ex) {
                System.out.println("HUHUHU");
                        System.out.println("******" + ex.getMessage());
            //log.error("Initial SessionFactory creation failed.",
ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    public static final ThreadLocal session = new ThreadLocal();

    public static Session currentSession() throws HibernateException {
        Session s = (Session) session.get();
        // Open a new Session, if this Thread has none yet
        if (s == null) {
            s = sessionFactory.openSession();
            session.set(s);
        }
        return s;
    }

    public static void closeSession() throws HibernateException {
        Session s = (Session) session.get();
        session.set(null);
        if (s != null)
            s.close();
    }
}
================================================================
========================================================
I got the following Servlet Exception
type Exception report

message

description The server encountered an internal error () that prevented
it from fulfilling this request.

exception

org.apache.jasper.JasperException
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:254)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

............
root cause

javax.servlet.ServletException
        at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:536)
        at org.apache.jsp.test_jsp._jspService(test_jsp.java:106)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:210)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)

=======================================================
Here is part of the output in catalina.out:
"Aug 19, 2004 8:43:16 PM
net.sf.hibernate.transaction.TransactionManagerLookupFactory
getTransactionManagerLookup
INFO: No TransactionManagerLookup configured (in JTA environment, use
of process level read-write cache is not recommended)
Aug 19, 2004 8:43:16 PM net.sf.hibernate.cfg.SettingsFactory
buildSettings
INFO: Use scrollable result sets: true
Aug 19, 2004 8:43:16 PM net.sf.hibernate.cfg.SettingsFactory
buildSettings
INFO: Use JDBC3 getGeneratedKeys(): false
Aug 19, 2004 8:43:16 PM net.sf.hibernate.cfg.SettingsFactory
buildSettings
INFO: Optimize cache for minimal puts: false
Aug 19, 2004 8:43:16 PM net.sf.hibernate.cfg.SettingsFactory
buildSettings
INFO: Query language substitutions: {}
Aug 19, 2004 8:43:16 PM net.sf.hibernate.cfg.SettingsFactory
buildSettings
INFO: cache provider: net.sf.hibernate.cache.EhCacheProvider
Aug 19, 2004 8:43:16 PM net.sf.hibernate.cfg.Configuration
configureCaches
INFO: instantiating and configuring caches
HUHUHU
******net/sf/cglib/core/KeyFactory
                                                                      
                                                                      
            Stopping service Tomcat-Standalone
Aug 19, 2004 8:43:03 PM org.apache.coyote.http11.Http11Protocol
destroy
INFO: Stoping http11 protocol on 8080
Catalina:type=ThreadPool,name=http8080"
==============================================================
I don't know what was going on.
What does the "net/sf/cglib/core/KeyFactory" message printed out above
mean?
Is there anything wrong with my configuration?
Thanks. I would appreciate any help.
Tung Chau

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