I wonder if anyone has encountered the same problem described here? I am having the same problem. My EAR contains a module app.jar, which contains the persistence.xml file: | <persistence> | <persistence-unit name="myDB"> | <provider>org.hibernate.ejb.HibernatePersistence</provider> | <jta-data-source>java:appDS</jta-data-source> | </persistence-unit> | </persistence> | Where the appDS is deployed with a xxx-ds.xml file with no problem. However, I am getting the same NoInitialContextException. I tried to deploy the app.jar under module/java as well as module/ejb but same problem. I also tried to add: <properties> | <property name="java.naming.factory.initial" value="org.jnp.interfaces.NamingContextFactory" /> | <property name="java.naming.factory.url.pkgs" value="org.jboss.naming:org.jnp.interfaces" /> | </properties> | to the persistence.xml file and same error. I have no clue what is wrong. It's deployed to the server so no jndi.properties file should be needed. If so, why this error occurs? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4109449#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...