I am new to Hibernate and trying to get simple load application to work.
I am using version 2.1.8 with Oracle9ias and when I start my application I get

net.sf.hibernate.HibernateException: could not instantiate CacheProvider: net.sf.hibernate.cache.EhCacheProvider

Any help is appretiated.

stack trace is below:

net.sf.hibernate.HibernateException: could not instantiate CacheProvider: net.sf.hibernate.cache.EhCacheProvider
at net.sf.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:145)
at net.sf.hibernate.cfg.Configuration.buildSettings(Configuration.java:1172)
at net.sf.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:803)
at com.epredix.hibernate.HibernateUtil.<clinit>(HibernateUtil.java:19)
at com.epredix.hibernate.UserDAO.getUserById(UserDAO.java:15)
at com.epredix.asteroid.manager.hibernate.HibernateManager.loadUser(HibernateManager.java:13)
at com.epredix.asteroid.action.hibernate.UserAction.perform(UserAction.java:56)
at com.epredix.commons.framework.web.SimpleActionManager.dispatch(Simple
ActionManager.java:134)
at com.epredix.commons.framework.web.CommandServlet.doGetOrPost(CommandS
ervlet.java:174)
at com.epredix.commons.framework.web.CommandServlet.doPost(CommandServle
t.java:153)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletReque
stDispatcher.java:765)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(Ser
vletRequestDispatcher.java:317)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpReques
tHandler.java:790)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.ja
va:270)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.ja
va:112)
at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(Relea
sableResourcePooledExecutor.java:186)
at java.lang.Thread.run(Thread.java:534)
Caused by: java.lang.ClassCastException
at net.sf.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.ja
va:142)

you must ensure yourself that ehcache.jar is in your classpath

Thanks you for the reply.

By unzipping the jar files I se that net.sf.hibernate.cache.EhCacheProvider is in the hibernate2.jar file and yes both ehcache-0.9.jar and hibernate2.jar files are in my class path.

here is some more info:

I created a simple HibernateUtil class to get session. The error happens in the buildSessionFactory method



/*
* Simple helper clas to obtain a new hibernate session
*/
public class HibernateUtil {

private static final SessionFactory sessionFactory;

static {
try {
Configuration configuration = new Configuration();
sessionFactory = configuration.configure().buildSessionFactory();
} catch (Throwable e) {
e.printStackTrace(System.out);
throw new ExceptionInInitializerError(e);
}
}

/*
* accessor method that returns a nes session
*/
public static Session getSession() throws HibernateException {
return sessionFactory.openSession();
}
}