yunshi tan [https://community.jboss.org/people/yunshi] created the discussion "@PersistenceContext is null in jboss7" To view the discussion, visit: https://community.jboss.org/message/759623#759623 -------------------------------------------------------------- Hi all, I am migrating jboss4.2.3 -> jboss7 and I am totally blocked by the probleme that @PersistenceContext  always returns me NULL in the EJB jars. Here are the projects in my deployment : deployment -----------------------------   - hibernate-ejb-1.jar      | - src/main/java ... some entities and DAO     | - src/main/resources               | - META-INF                     | - hibernate.cfg.xml                     | - persistence.xml - seam2App.ear      | - module1.jar     | - module2.jar      | - war1.war      hibernate-ejb-1.jar offers some DAO functions for my seam2App.ear and other applications. *However, in hibernate-ejb-1.jar, all the @PersistenceContext  EntityManager returns NULL.* *Here is the persistence.xml* <persistence xmlns=" http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence"           xmlns:xsi=" http://www.w3.org/2001/XMLSchema-instance http://www.w3.org/2001/XMLSchema-instance"           xsi:schemaLocation=" http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"           version="1.0">                <persistence-unit name="xxx-unit" transaction-type="JTA">         <provider>org.hibernate.ejb.HibernatePersistence</provider>                          <jta-data-source>java:/xxxxxDS</jta-data-source>                          <properties>                      <property name="hibernate.ejb.cfgfile" value="/META-INF/hibernate.cfg.xml"/>                     <property name="jboss.entity.manager.factory.jndi.name" value="java:jboss/EntityManagerFactories/xxx"/>                     <property name="hibernate.session_factory_name" value="java:jboss/hibernate/SessionFactoryxxx"/>                     <property name="jboss.as.jpa.providerModule" value="org.hibernate:3" />          </properties>           </persistence-unit> </persistence> In the *cosole*, I have 12:15:49,752 INFO  [org.jboss.as.ejb3.deployment.processors.EjbJndiBindingsDeploymentUnitProcessor] (MSC service thread 1-2) JNDI bindings for session bean named xxxDAOImpl in deployment unit deployment "xxxxxxx-SNAPSHOT.jar" are as follows:         java:global/xxxxxx-SNAPSHOT/xxxxxxDAOImpl!com.xxxx.dao.common.remotexxxxxxDAORemote         java:app/xxxxxx-SNAPSHOT/xxxxxxDAOImpl!com.xxxxxx.dao.common.remote.xxxxxxDAORemote         java:module/xxxxxxDAOImpl!com.xxxxxx.dao.common.remote.xxxxxxDAORemote         java:jboss/exported/xxxxxx-SNAPSHOT/xxxxxxDAOImpl!com.xxxxxx.dao.common.remote.xxxxxxDAORemote         java:global/xxxxxx-SNAPSHOT/xxxxxxDAOImpl!com.xxxxxx.dao.common.local.xxxxxxDAOLocal         java:app/xxxxxx-SNAPSHOT/xxxxxxDAOImpl!com.xxxxxx.dao.common.local.xxxxxxDAOLocal         java:module/xxxxxxDAOImpl!com.xxxxxx.dao.common.local.xxxxxxDAOLocal In other applications who depend on hibernate-ejb-1.jar, I tried to get the Ejb like this:      context = new InitialContext();      DAO dao=  (DAO ) context. lookup("java:global/xxxxxx-SNAPSHOT/xxxxxxDAOImpl!com.xxxxxx.dao.common.local.xxxxxxDAOLocal"); *DAO.java looks like this* @Stateless public class DAOImpl implements DAOLocal, DAORemote{     @PersistenceContext     private EntityManager entityManager;           public List<Bean> findAll() {                     Query query = createNamedQuery(Bean.FIND_ALL);                     if(query!=null)                               return query.getResultList();                     return null;           } } However, I have the NPE because @PersistenceContext  EntityManager entityManager  is always null. The probleme is : -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/759623#759623] Start a new discussion in JBoss AS 7 Development at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]