Dear friends.
I've a problem with hibernate 2.I' m developing a Struts application who uses hibernate for persistence.The DB is Mysql 4 and Container is Tomcat 5.0.28.
I've created javabeans & DAOs with Hibernate Synchronizer plugin.

I've an action with this code

// load the configuration file
_BaseRootDAO.initialize();


RivistaDAO dao = new RivistaDAO();
List issues = dao.findAll();

and the relative Rivista.hbm is :

<hibernate-mapping package="net.rivista.hibernate">
<class name="Rivista" table="rivista">
<id
column="numero"
name="Numero"
type="integer"
>
<generator class="vm" />
</id>
<property
column="anno"
length="10"
name="Anno"
not-null="false"
type="integer"
/>
<set
inverse="true"
lazy="true"
name="ArticoliSet"
>
<key column="rivista_numero" />
<one-to-many class="Articoli" />
</set>
</class>
</hibernate-mapping>

THIS IS hibernate.cfg.xml

<hibernate-configuration>
<session-factory name="HsessionFactory">
<!-- local connection properties -->
<property name="connection.datasource">
java:comp/env/jdbc/rivista
</property>

<!-- property name="hibernate.connection.pool_size"></property -->
<!-- dialect for MySQL -->
<property name="dialect">
net.sf.hibernate.dialect.MySQLDialect
</property>
<property name="hibernate.show_sql">false</property>
<property name="hibernate.use_outer_join">true</property>

<mapping resource="Utenti.hbm" />
<mapping resource="Abbonamenti.hbm" />
<mapping resource="Articoli.hbm" />
<mapping resource="Rivista.hbm" />
<mapping resource="Redazione.hbm" />
<mapping resource="Country.hbm" />
</session-factory>
</hibernate-configuration>


When action executes retrives the following error:

java.lang.NoClassDefFoundError
net.sf.hibernate.impl.SessionFactoryImpl.<clinit>(SessionFactoryImpl.java:237)
net.sf.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:796)
net.rivista.hibernate.base._BaseRootDAO.initialize(_BaseRootDAO.java:54)
net.rivista.hibernate.base._BaseRootDAO.initialize(_BaseRootDAO.java:37)
net.rivista.azioni.AdminLoginAction.execute(AdminLoginAction.java:33)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:421)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:226)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:415)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

CAN YOU HELP ME?
THANKS

Hi,

did you copy the JDBC driver to the global classpath of Tomcat?
http://www.hibernate.org/hib_docs/reference/en/html_single/#quickstart

Can you catch the NoClassDefFoundError to get details about the missing class?