[ INFO] {02/02/06 10:11:48} (bbdd.HttpListener.sessionCreated()) - Nueva Sesión: 918791DA23E88870E976EE8FF133CADD IP: 127.0.0.1
[ INFO] {02/02/06 10:11:48} (bbdd.Hibernate.ExtendedThreadLocalSessionContext.buildOrObtainSession()) - Opening a new Session
[ INFO] {02/02/06 10:11:48} (bbdd.Hibernate.ExtendedThreadLocalSessionContext.buildOrObtainSession()) - Disabling automatic flushing of the Session
[ERROR] {02/02/06 10:11:53} (bbdd.Hibernate.HibernateThreadFilter.doFilter()) - Cleanup after exception!
[ERROR] {02/02/06 10:11:53} (catalina.core.StandardWrapperValve.invoke()) - Servlet.service() para servlet default lanzó excepción
java.lang.NullPointerException
        at bbdd.Hibernate.HibernateThreadFilter.doFilter(HibernateThreadFilter.java:137)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:362)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:825)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:738)
        at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:526)
        at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
        at java.lang.Thread.run(Thread.java:595)
[ INFO] {02/02/06 10:11:53} (bbdd.Hibernate.ExtendedThreadLocalSessionContext.buildOrObtainSession()) - Opening a new Session
[ INFO] {02/02/06 10:11:53} (bbdd.Hibernate.ExtendedThreadLocalSessionContext.buildOrObtainSession()) - Disabling automatic flushing of the Session

/*
* HibernateThreadFilter.java
*
* Created on 11 de enero de 2006, 10:47
*
* To change this template, choose Tools | Options and locate the template under
* the Source Creation and Management node. Right-click the template and choose
* Open. You can then make changes to the template in the Source Editor.
*/

package bbdd.Hibernate;

import org.apache.commons.logging.*;
import org.hibernate.*;

import javax.servlet.*;
import javax.servlet.Filter;
import javax.servlet.http.*;
import java.io.IOException;
import bbdd.Hibernate.ExtendedThreadLocalSessionContext;


/**
* A servlet filter that provides a thread-bound session-per-request.
* <p>
* This filter should be used if your <tt>hibernate.current_session_context_class</tt>
* configuration is set to <tt>thread</tt> and you are not using JTA/CMT. You can use
* this filter for a thread-bound <tt>Session</tt>, either with resource-local transactions
* (direct JDBC) or user-managed JTA transactions. Set your
* <tt>hibernate.transaction.factory_class</tt> accordingly.
* <p>
* An alternative, more flexible solution is <tt>TransactionInterceptor</tt>
* that can be applied to any pointcut with JBoss AOP.
* <p>
* Note that you should not use this interceptor out-of-the-box with enabled optimistic
* concurrency control. Apply your own compensation logic for failed conversations, this
* is totally dependent on your applications design.
*
* @see org.hibernate.ce.auction.persistence.TransactionInterceptor
*
* @author christian@hibernate.org
*/
public class HibernateThreadFilter implements Filter {

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

    private SessionFactory sf;
   
    public static final String HIBERNATE_SESSION_KEY    = "hibernate_session";
    public static final String END_OF_CONVERSATION_FLAG = "end_of_conversation";

    public void doFilter(ServletRequest request,
                         ServletResponse response,
                         FilterChain chain)
            throws IOException, ServletException {


        // Try to get a Hibernate Session from the HttpSession
        HttpSession httpSession = ((HttpServletRequest) request).getSession();
        Session hibernateSession = (Session) httpSession.getAttribute(HIBERNATE_SESSION_KEY);

        try {

            if (hibernateSession != null) {
                log.debug("< Continuing conversation");
                ExtendedThreadLocalSessionContext.bind(hibernateSession);
            } else {
                log.debug(">>> New conversation");
            }

            log.debug("Starting a database transaction");
           
            sf.getCurrentSession().beginTransaction();
                   

            // Do the work...
            chain.doFilter(request, response);

            // End or continue the long-running conversation?
            if (request.getAttribute(END_OF_CONVERSATION_FLAG) != null) {

                log.debug("Flushing Session");
                sf.getCurrentSession().flush();

                log.debug("Committing the database transaction");
                sf.getCurrentSession().getTransaction().commit();

                log.debug("Closing and unbinding Session from thread");
                sf.getCurrentSession().close(); // Unbind is automatic here

                log.debug("Removing Session from HttpSession");
                httpSession.setAttribute(HIBERNATE_SESSION_KEY, null);

                log.debug("<<< End of conversation");

            } else {

                log.debug("Committing database transaction");
                sf.getCurrentSession().getTransaction().commit();
                         
                log.debug("Unbinding Session from thread");
                hibernateSession = ExtendedThreadLocalSessionContext.unbind(sf);
               
                log.debug("Agregando sesion hibernate a la HttpSession");
                httpSession.setAttribute("hibernate_session", hibernateSession);
               
                log.debug("> Returning to user in conversation");
            }

        } catch (StaleObjectStateException staleEx) {
            log.error("This interceptor does not implement optimistic concurrency control!");
            log.error("Your application will not work until you add compensation actions!");
            // Rollback, close everything, possibly compensate for any permanent changes
            // during the conversation, and finally restart business conversation. Maybe
            // give the user of the application a chance to merge some of his work with
            // fresh data... what you do here depends on your applications design.
            throw staleEx;
        } catch (Throwable ex) {
            // Rollback only
            try {
                if (sf.getCurrentSession().getTransaction().isActive()) {
                    log.debug("Trying to rollback database transaction after exception");
                    sf.getCurrentSession().getTransaction().rollback();
                }
            } catch (Throwable rbEx) {
                log.error("Could not rollback transaction after exception!" + rbEx.getLocalizedMessage(), rbEx);
            } finally {
                log.error("Cleanup after exception!");

                // Cleanup
                log.debug("Closing and unbinding Session from thread");
                sf.getCurrentSession().close(); // Unbind is automatic here

                log.debug("Removing Session from HttpSession");
                httpSession.setAttribute(HIBERNATE_SESSION_KEY, null);
            }
            if (ex.getCause().getLocalizedMessage()!= null) {
                if (ex.getCause().getLocalizedMessage().indexOf("pool exhausted")!= -1) {
                    log.warn("El pool de conexiones de la aplicación está lleno.");
                }
            }
            // Let others handle it... maybe another interceptor for exceptions?
            throw new ServletException(ex);
        }

    }

    public void init(FilterConfig filterConfig) throws ServletException {
        log.info("Initializing filter, obtaining Hibernate SessionFactory from HibernateUtil");
        sf = oConexion.getSessionFactory();
    }

    public void destroy() {}


}

/*
* ExtendedThreadLocalSessionContext.java
*
* Created on 17 de enero de 2006, 10:40
*
* To change this template, choose Tools | Options and locate the template under
* the Source Creation and Management node. Right-click the template and choose
* Open. You can then make changes to the template in the Source Editor.
*/

package bbdd.Hibernate;

import org.hibernate.context.*;
import org.hibernate.engine.SessionFactoryImplementor;
import org.hibernate.classic.Session;
import org.hibernate.*;
import org.apache.commons.logging.*;

/**
*
* @author Administrador
*/
public class ExtendedThreadLocalSessionContext extends ThreadLocalSessionContext {

    private static final Log log = LogFactory.getLog( ExtendedThreadLocalSessionContext.class );

    public ExtendedThreadLocalSessionContext(SessionFactoryImplementor factory) {
        super(factory);
    }

    // Always set FlushMode.NEVER on any Session
    protected Session buildOrObtainSession() {
        log.info("Opening a new Session");
        Session s = super.buildOrObtainSession();

        log.info("Disabling automatic flushing of the Session");
        s.setFlushMode(FlushMode.NEVER);

        return s;
    }

    // No automatic flushing of the Session at transaction commit, client calls flush()
    protected boolean isAutoFlushEnabled() { return false; }

    // No automatic closing of the Session at transaction commit, client calls close()
    protected boolean isAutoCloseEnabled() { return false; }

    // Don't unbind after transaction completion, we expect the client to do this
    // so it can flush() and close() if needed (or continue the conversation).
    protected CleanupSynch buildCleanupSynch() {
        return new NoCleanupSynch(factory);
    }
    private static class NoCleanupSynch extends ThreadLocalSessionContext.CleanupSynch {
        public NoCleanupSynch(SessionFactory factory) { super(factory); }
        public void beforeCompletion() {}
        public void afterCompletion(int i) {}
    }
}

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
    "-//Hibernate/Hibernate Configuration DTD//EN"
    "hibernate-configuration-3.0.dtd">

<hibernate-configuration>

    <session-factory>

        <property name="connection.datasource">java:comp/env/jdbc/intranet</property>
        <property name="dialect">org.hibernate.dialect.PostgreSQLDialect</property>
         <!-- Disable autocommit -->
        <property name="connection.pool_size">1</property>
        <property name="connection.autocommit">false</property>   
        <property name="transaction.auto_close_session">false</property>
        <property name="transaction.flush_before_completion">false</property>

   
        <!-- Disable second-level cache. -->
        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
        <property name="cache.use_query_cache">false</property>
        <property name="cache.use_minimal_puts">false</property>
        <property name="max_fetch_depth">3</property>
   
   
        <!-- Print SQL to stdout. -->
        <property name="show_sql">false</property>
        <property name="format_sql">false</property>
   
        <!-- Bind the getCurrentSession() method to the thread. -->
        <property name="current_session_context_class">bbdd.Hibernate.ExtendedThreadLocalSessionContext</property>
               

        <!-- Mapping files -->
        <mapping resource="bbdd/hibernateXML/tTomcat_Config.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tAdjuntos.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tUsuarios.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tDPersonales.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tTickets.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tCentros.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tServidores.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tAvisos.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tIncidencias.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tEncuestas.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tEnc_Resultados.hbm.xml"/>     
        <mapping resource="bbdd/hibernateXML/tLineas_Datos.hbm.xml"/>   
        <mapping resource="bbdd/hibernateXML/tPerfiles.hbm.xml"/>   
        <mapping resource="bbdd/hibernateXML/tPermisos_Menu.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tMenu.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tPermisos_Menu_Info.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tMenu_Info.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tTip_Pago.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tDepartamentos.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tSistemas.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tCod_Inci.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tInci_Estados.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tTipo_Inci.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tTipos_Lineas.hbm.xml"/>   
        <mapping resource="bbdd/hibernateXML/tDpto_Tops.hbm.xml"/>
        <mapping resource="bbdd/hibernateXML/tCorreos.hbm.xml"/>
    </session-factory>

</hibernate-configuration>

public class oConexion {

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

    private static final String INTERCEPTOR_CLASS = "hibernate.util.interceptor_class";

    private static Configuration configuration;
    private static SessionFactory sessionFactory;

    static {
        // Create the initial SessionFactory from the default configuration files
        try {

            // Replace with Configuration() if you don't use annotations or JDK 5.0
            configuration = new Configuration();

            // This custom entity resolver supports entity placeholders in XML mapping files
            // and tries to resolve them on the classpath as a resource
            configuration.setEntityResolver(new ImportFromClasspathEntityResolver());

            // Read not only hibernate.properties, but also hibernate.cfg.xml
            configuration.configure();

            // Set global interceptor from configuration
            setInterceptor(configuration, null);

            if (configuration.getProperty(Environment.SESSION_FACTORY_NAME) != null) {
                // Let Hibernate bind the factory to JNDI
                configuration.buildSessionFactory();
            } else {
                // or use static variable handling
                sessionFactory = configuration.buildSessionFactory();
            }

        } catch (Throwable ex) {
            // We have to catch Throwable, otherwise we will miss
            // NoClassDefFoundError and other subclasses of Error
            log.error("Building SessionFactory failed.", ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    /**
     * Returns the original Hibernate configuration.
     *
     * @return Configuration
     */
    public static Configuration getConfiguration() {
        return configuration;
    }

    /**
     * Returns the global SessionFactory.
     *
     * @return SessionFactory
     */
    public static SessionFactory getSessionFactory() {
        SessionFactory sf = null;
        String sfName = configuration.getProperty(Environment.SESSION_FACTORY_NAME);
        if ( sfName != null) {
            log.debug("Looking up SessionFactory in JNDI.");
            try {
                sf = (SessionFactory) new InitialContext().lookup(sfName);
            } catch (NamingException ex) {
                throw new RuntimeException(ex);
            }
        } else {
            sf = sessionFactory;
        }
        if (sf == null)
            throw new IllegalStateException("SessionFactory not available.");
        return sf;
    }

    /**
     * Closes the current SessionFactory and releases all resources.
     * <p>
     * The only other method that can be called on HibernateUtil
     * after this one is rebuildSessionFactory(Configuration).
     */
    public static void shutdown() {
        log.info("Shutting down Hibernate.");
        // Close caches and connection pools
        getSessionFactory().close();

        // Clear static variables
        configuration = null;
        sessionFactory = null;
    }


    /**
     * Rebuild the SessionFactory with the static Configuration.
     * <p>
     * This method also closes the old SessionFactory before, if still open.
     * Note that this method should only be used with static SessionFactory
     * management, not with JNDI or any other external registry.
     */
     public static void rebuildSessionFactory() {
        log.debug("Using current Configuration for rebuild.");
        rebuildSessionFactory(configuration);
     }

    /**
     * Rebuild the SessionFactory with the given Hibernate Configuration.
     * <p>
     * HibernateUtil does not configure() the given Configuration object,
     * it directly calls buildSessionFactory(). This method also closes
     * the old SessionFactory before, if still open.
     *
     * @param cfg
     */
     public static void rebuildSessionFactory(Configuration cfg) {
        log.debug("Rebuilding the SessionFactory from given Configuration.");
        synchronized(sessionFactory) {
            if (sessionFactory != null && !sessionFactory.isClosed())
                sessionFactory.close();
            if (cfg.getProperty(Environment.SESSION_FACTORY_NAME) != null)
                cfg.buildSessionFactory();
            else
                sessionFactory = cfg.buildSessionFactory();
            configuration = cfg;
        }
     }

    /**
     * Register a Hibernate interceptor with the current SessionFactory.
     * <p>
     * Every Session opened is opened with this interceptor after
     * registration. Has no effect if the current Session of the
     * thread is already open, effective on next close()/getCurrentSession().
     * <p>
     * Attention: This method effectively restarts Hibernate. If you
     * need an interceptor active on static startup of HibernateUtil, set
     * the <tt>hibernateutil.interceptor</tt> system property to its
     * fully qualified class name.
     */
    public static SessionFactory registerInterceptorAndRebuild(Interceptor interceptor) {
        log.debug("Setting new global Hibernate interceptor and restarting.");
        setInterceptor(configuration, interceptor);
        rebuildSessionFactory();
        return getSessionFactory();
    }

    public static Interceptor getInterceptor() {
        return configuration.getInterceptor();
    }

    /**
     * Resets global interceptor to default state.
     */
    public static void resetInterceptor() {
        log.debug("Resetting global interceptor to configuration setting");
        setInterceptor(configuration, null);
    }

    /**
     * Either sets the given interceptor on the configuration or looks
     * it up from configuration if null.
     */
    private static void setInterceptor(Configuration configuration, Interceptor interceptor) {
        String interceptorName = configuration.getProperty(INTERCEPTOR_CLASS);
        if (interceptor == null && interceptorName != null) {
            try {
                Class interceptorClass =
                        oConexion.class.getClassLoader().loadClass(interceptorName);
                interceptor = (Interceptor)interceptorClass.newInstance();
            } catch (Exception ex) {
                throw new RuntimeException("Could not configure interceptor: " + interceptorName, ex);
            }
        }
        if (interceptor != null) {
            configuration.setInterceptor(interceptor);
        } else {
            configuration.setInterceptor(EmptyInterceptor.INSTANCE);
        }
    }

}

org.hibernate.HibernateException: load is not valid without active transaction.