Hi,
I have configured a JTA datasource in my persistence.xml

 <persistence-unit name="h-source">
 <jta-data-source>java:DefaultDS</jta-data-source>
 <properties>
 <property name="hibernate.connection.driver_class" value="org.hsqldb.jdbcDriver"/>
 <property name="hibernate.connection.username" value="sa"/>
 <property name="hibernate.connection.password" value=""/>
 <property name="hibernate.connection.url" value="jdbc:hsqldb:."/>
 <property name="hibernate.hbm2ddl.auto" value="create-drop"/>
 <property name="hibernate.cache.provider_class" value="org.hibernate.cache.HashtableCacheProvider"/>
 </properties>
 </persistence-unit>

A simple JSP tries to look it up

EntityManagerFactory emf =
 Persistence.createEntityManagerFactory("h-source");

I get the following:

org.hibernate.HibernateException: The chosen transaction strategy requires access to the JTA TransactionManager
 org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:329)
 org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1294)
 org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:713)
 org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:121)
 javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:51)
 javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:33)
 org.apache.jsp.TestJTAWithJPA_jsp._jspService(TestJTAWithJPA_jsp.java:75)

Can I only use the EntityManagerFactory with JTA if I am inside a Session Bean?

Note the following link says so:
http://www.abcseo.com/tech/java/jboss-ebj-troubleshooting

anyone any ideas?