Hibernate doesnot support oracle 11g as it does not have Oracle11g dialect.

I am trying to use hibernate as persistence provider underneath JPA.
Below is my persistence.xml under WEB-INF folder:
<?xml version="1.0"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/ ... ce_1_0.xsd"
version="1.0">
<persistence-unit name="actionBazaar" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<non-jta-data-source>testDS</non-jta-data-source>
<properties>
<property name="hibernate.archive.autodetection" value="class, hbm"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect"/>
<property name="hibernate.query.factory_class" value="org.hibernate.hql.classic.ClassicQueryTranslatorFactory" />
</properties>
</persistence-unit>
</persistence>
I am packing my application as an ear.
While running my application encountered following error:

Caused by: org.hibernate.HibernateException: Could not instantiate dialect class
at org.hibernate.dialect.DialectFactory.buildDialect(DialectFactory.java:107)
at org.hibernate.dialect.DialectFactory.buildDialect(DialectFactory.java:65)
at org.hibernate.cfg.SettingsFactory.determineDialect(SettingsFactory.java:460)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:155)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2101)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1325)
at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:867)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:669)
... 53 more
Caused by: java.lang.ClassCastException: org.hibernate.dialect.Oracle10gDialect cannot be cast to org.hibernate.dialect.Dialect
at org.hibernate.dialect.DialectFactory.buildDialect(DialectFactory.java:101)
... 60 more

Can some one help ?

That's not true
http://docs.jboss.org/hibernate/core/3. ... l-dialects


This likely means you are having duplicate classes on your classpath, making the JVM complain about an incompatible assignment. I'd suggest to check which jars are on the classpath, or run a tool to search for duplicates as Tattletale.