I am getting this error in my HibernateUtil.java :

java.lang.ClassCastException: java.util.HashSet
at org.hibernate.util.PropertiesHelper.resolvePlaceHolders(PropertiesHel
per.java:88)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.jav
a:1173)
at com.rhg.infrastructure.dao.util.HibernateUtil.<clinit>(HibernateUtil.
java:14)
at com.rhg.infrastructure.dao.impl.MessagesDAOImpl.saveMessage(MessagesD

and my HibernateUtil.java code :

public class HibernateUtil {

private static final SessionFactory sessionFactory;

static {
try {
// Create the SessionFactory from hibernate.cfg.xml
System.out.println("@@@@@@@@@@@ in hibernateUtil setting session factory");
sessionFactory = new Configuration().configure().buildSessionFactory();
} catch (Throwable ex) {
// Make sure you log the exception, as it might be swallowed
ex.printStackTrace();
throw new ExceptionInInitializerError(ex);
}
}

public static SessionFactory getSessionFactory() {
return sessionFactory;
}
}


And my hibernate.cfg.xml code :

<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
<session-factory>

<!-- MySQL Database -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost/revolution</property>
<property name="connection.username">root</property>
<property name="connection.password">admin</property>
<property name="connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>

<!-- Use the C3P0 connection pool. -->
<property name="c3p0.min_size">3</property>
<property name="c3p0.max_size">5</property>
<property name="c3p0.timeout">1800</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">true</property>
<property name="format_sql">true</property>


<!-- Bind the getCurrentSession() method to the thread. -->
<property name="current_session_context_class">thread</property>

<!-- Hibernate XML mapping files -->
<mapping resource="mapping/Message.hbm.xml"/>


</session-factory>

</hibernate-configuration>

Any idea ?

Looks like it might be this bug that's already been fixed:- http://opensource.atlassian.com/project ... e/HHH-1762