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1. there is no default persistence unit in this deployment    stackoverflow.com

i recieve the error below after creating a new EJB bean: 

> java.lang.RuntimeException: Illegal
> @PersistenceUnit on private
> javax.persistence.EntityManager
> com.mgt.ejb.session.dao.directdebit.PWDDIDetailsDAOBean.mEntityManager
> :There is no default persistence unit
> in this deployment.   at
> org.jboss.injection.PersistenceContextHandler.handleFieldAnnotations(PersistenceContextHandler.java:182)
> ...

2. Can't persist data into Oracle 10g by the default persistence layer of EJB 3.0 (Hibernate)    coderanch.com

3. Hibernate in EJB3 Mode does not recognice default-lazy=false    forum.hibernate.org