i have deployed one hibernate project in Jboss as and .har file

in the deploy folder i have two archive
deploy
|-Track.har
| |
| |-META-INF
| | |-jboss-service.xml
| | |-jboss-app.xml
| |
| |-Source
| |-*.hbm.xml and corresponding .class file(Track.hbm.xml,Track.class)
|-Track.war
| |-WEB-INF
| | |-web.xml,jboss-web.xml
| | |-classes
| | |-java files (*.class)that access sessionFactory
|-JSP
|-all jsp files


i have deployed my project as a war and har files
i have written certain utility classes that lookup for the sessionFactory and create session
and in that session execute the HQL.
public static SessionFactory getHibernateSessionFactory(String JNDI_sessionFactory) throws NamingException
{
Context context=new InitialContext();
SessionFactory sessionFactory=(SessionFactory)context.lookup(JNDI_sessionFactory);
return sessionFactory;

}
public static Session getSessionFromSessionFactory(String JNDI_sessionFactory) throws HibernateException, NamingException
{

Session session=(Session)ServiceLocator.getHibernateSessionFactory(JNDI_sessionFactory).openSession();
return session;

}
public List getTracks()
{
List trackList=null;
try {
Session session=ServiceLocator.getSessionFromSessionFactory("java:/hibernate/TrackSessionFactory");
Query query=session.createQuery("from source.Track");
trackList=query.list();
/* if (ServiceLocator.getSessionFromSessionFactory("java:/hibernate/TrackSessionFactory").createCriteria(source.Track.class) instanceof org.hibernate.impl.CriteriaImpl) {
trackList=(org.hibernate.impl.CriteriaImpl)ServiceLocator.getSessionFromSessionFactory("java:/hibernate/TrackSessionFactory").createCriteria(source.Track.class);
}
*/

}
catch (HibernateException e)
{
e.printStackTrace();
}
catch (NamingException e)
{
e.printStackTrace();
}

return trackList;

}

and these utility classes are in my Track.war folder
i am using Eclipse as an IDE
now when i debug above method getTracks() by inserting break points i get proper data in trackList that i am returning at the end.

i have called the above getTracks() method from a JSP
but while casting the object to Track i get a classCast exception

EditTracks tracks=new EditTracks();
List listTracks=tracks.getTracks();

for(Iterator itr=listTracks.iterator();itr.hasNext();)
{
Track aTrack=new Track();
aTrack=(Track)itr.next();//Error over here
System.out.println(aTrack.getTitle());

}
now while accessing above code in a JSP file
i get classCast exception.
but when i restart the server things work fine as expected.(no exception)
so i have 2 main questions over here
(1)the way i have orgainsed my war and Har files, is it the best way to do it , or there are other ways to do it-actually i just read over net how to deploy hibernate in jboss and things worked for me so i did not think much about where to keep all hibernate *.hbm.xml file and there POJO's where to keep files for my web archive like JSP,css,HTML and java
(2)Why do i get these class cast exception, and y it vanishes when i restart the server.


Thnaks in advanced.