anonymous wrote : javax.persistence.PersistenceException: [PersistenceUnit: BiddingTest] Unable to build EntityManager | Factory | at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:677) | at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:126) | | at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:52) | at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:34) | at Main.main(Main.java:43) | Caused by: org.hibernate.HibernateException: Could not find datasource | at org.hibernate.connection.DatasourceConnectionProvider.configure(DatasourceConnectionProvider.jav | a:79) | at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFacto | ry.java:137) | at org.hibernate.ejb.InjectionSettingsFactory.createConnectionProvider(InjectionSettingsFactory.jav | a:29) | at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:89) | 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) | ... 4 more | Caused by: javax.naming.NoInitialContextException: Need to specify class name in environment or syst | em property, or as an applet parameter, or in an application resource file: java.naming.factory.ini | tial | at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:645) | at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:247) | at javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:284) | at javax.naming.InitialContext.lookup(InitialContext.java:351) | at org.hibernate.connection.DatasourceConnectionProvider.configure(DatasourceConnectionProvider.jav | a:75) | You need to place a jndi.properties in the client's classpath. See this for more details http://www.jboss.org/community/docs/DOC-9816 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4198407#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...