I was using Hibernate 2.0.3 and all was OK.
Now i use hibernate 2.1rc1. So i replace hibernate.jar (2.0.3) by hibernate.jar(2.1rc1) and when i execute the application to access BD, i have the following error message :

INFO: cache provider: net.sf.ehcache.hibernate.Provider
net.sf.hibernate.HibernateException: could not instantiate CacheProvider: net.sf.ehcache.hibernate.Provider at net.sf.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:115)
at net.sf.hibernate.cfg.Configuration.buildSettings(Configuration.java:1072)
at net.sf.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:718

What does it means? Are there others files specially needed for 2.1rc excepting hibernate.jar

THANKS

You need to include ehcache.jar in your classpath.

mota

OK. But now, in TOMCAT, i have the message :

java.lang.NoClassDefFoundError: net/sf/cglib/core/KeyFactory

Read the TXT file in the lib/ subdirectory of the distribution. Copy all "required" files to your WEB-INF/lib.

I copy all required files but it still doesn't work.

java.lang.IllegalAccessError
net.sf.cglib.core.ClassEmitter.setTarget(ClassEmitter.java:87)
net.sf.cglib.core.ClassEmitter.(ClassEmitter.java:79)
net.sf.cglib.core.KeyFactory$Generator.generateClass(KeyFactory.java:197)
net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:186)
net.sf.cglib.core.KeyFactory$Generator.create(KeyFactory.java:177)
net.sf.cglib.core.KeyFactory.create(KeyFactory.java:149)
net.sf.cglib.core.KeyFactory.create(KeyFactory.java:142)
net.sf.hibernate.impl.SessionFactoryImpl.(SessionFactoryImpl.java:229)
net.sf.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:720)
com.cfort.dao.HibernateSession.currentSession(HibernateSession.java:33)
com.cfort.dao.HibernateDAOFactory.creerConnection(HibernateDAOFactory.java:30)
com.cfort.dao.HibernateUtilisateurDAO.existe(HibernateUtilisateurDAO.java:77)
com.cfort.service.UtilisateurService.existeUtilisateur(UtilisateurService.java:71)
com.cfort.struts.action.InscrireAction.execute(InscrireAction.java:83)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)

I don't understand this message. Here is my hibernate.cfg.xml file

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 2.0//EN"

"http://hibernate.sourceforge.net/hibernate-configuration-2.0.dtd">

<hibernate-configuration>
<session-factory>
<property name="connection.datasource">java:comp/env/jdbc/portail</property>
<property name="dialect">net.sf.hibernate.dialect.MySQLDialect</property>
<property name="show_sql">true</property>

<mapping resource="utilisateur.hbm.xml"/>
</session-factory>
</hibernate-configuration>

THANKS

Make sure you remove all old libraries before. This is a FAQ:

http://www.hibernate.org/?cmd=srchdoc&q=java.lang.IllegalAccessError

If i don't want to use any cache, how can i omit the ehcache.jar?

Can't

so the ehcache is merely instantiated without being used, if i don't configure it?

I don't know why i am forced to include a not used jar in 2.1.

Shouldn't you be able to drop ehcache.jar if you set hibernate.cache.provider_class = net.sf.hibernate.cache.HashtableCacheProvider ?

Yes.

So if I set the cache provider to be HastableCacheProvider and none of my class mappings include the "cache" element, then I've effectivle switched the 2nd-level cache off?

I ask because the HashTableCacheProvider is marked "not for production use".

Exactly - If you have no cache elements configured, no caching will be done

I've set my cache provider as shown above and none of my mapping files contain "cache" elements but I still need to include ehcache.jar to get things running.

Any ideas?

-marc

I take that back... Everything's working as expected