Hi there I created a very simple JPA Entity Project (BiddingTest) involving one bid entity (Bidder.java) and one bid client (BidClient.java) from the JPA Project Wizard in Eclipse Ganymede and JBoss 4.2.2.GA. I use Hibernate 3.3.1, Hibernate Annotations 3.4 and Hibernate Entity Manager 3.4. My BiddingTestEAR was built and deployed succesfully by the JBoss Server and I checked in my OracleXE db and found out that it had successfully managed to create the BIDDER table. However my problem occurs when I try to populate this BIDDER table from a JPA Test Client. The JPA Test Client keeps giving me the exception : javax.persistence.PersistenceException: [PersistenceUnit: BiddingTest] Unable to build EntityManagerFactory and Caused by: org.hibernate.HibernateException: Could not find datasource and Caused by: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial. Here is my console output: | [BidClient] : creating EntityManagerFactory... | log4j:WARN No appenders could be found for logger (org.hibernate.cfg.annotations.Version). | log4j:WARN Please initialize the log4j system properly. | javax.persistence.PersistenceException: [PersistenceUnit: BiddingTest] Unable to build EntityManagerFactory | 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.java:79) | at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:137) | at org.hibernate.ejb.InjectionSettingsFactory.createConnectionProvider(InjectionSettingsFactory.java: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 system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial | 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.java:75) | ... 11 more | [BidClient] : closing entity manager and factory... | Exception in thread "main" java.lang.NullPointerException | at Main.main(Main.java:88) | This is my persistence.xml file : | <?xml version="1.0" encoding="UTF-8"?> | <persistence> | <persistence-unit name="BiddingTest"> | <jta-data-source>java:/OracleXE1_DS</jta-data-source> | <properties> | <property name="hibernate.hbm2ddl.auto" value="create-drop"/> | <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect"/> | </properties> | </persistence-unit> | </persistence> | This is my oracle-ds.xml file : | <?xml version="1.0" encoding="UTF-8"?> | <datasources> | <local-tx-datasource> | <jndi-name>OracleXE1_DS</jndi-name> | <connection-url>jdbc:oracle:thin:system/system@localhost:1521:XE</connection-url> | <driver-class>oracle.jdbc.driver.OracleDriver</driver-class> | <user-name>system</user-name> | <password>system</password> | <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.OracleExceptionSorter</exception-sorter-class-name> | <metadata> | <type-mapping>Oracle10g</type-mapping> | </metadata> | </local-tx-datasource> | </datasources> | This is my BidClient.java file: | | package my.com.eperolehan.client; | | | import javax.persistence.EntityManager; | //import javax.persistence.EntityTransaction; | import javax.persistence.EntityManagerFactory; | import javax.persistence.Persistence; | //import javax.persistence.PersistenceContext; | | import my.com.eperolehan.entities.Bidder; | | import org.apache.log4j.Level; | import org.apache.log4j.Logger; | import org.apache.log4j.ConsoleAppender; | import org.apache.log4j.SimpleLayout; | | | public class BidClient { | | | private static EntityManagerFactory f; | | //@PersistenceContext(unitName="BiddingTest") | private static EntityManager em; | | | public static void main(String[] args) { | | | Logger log = Logger.getLogger(BidClient.class); | log.setLevel(Level.WARN); | | SimpleLayout layout = new SimpleLayout(); | ConsoleAppender appender = new ConsoleAppender(layout); | | | log.addAppender(appender); | | | try { | | | System.out.println("[BidClient] : creating EntityManagerFactory..."); | log.debug("[BidClient] : creating EntityManagerFactory..."); | f = Persistence.createEntityManagerFactory("BiddingTest"); | System.out.println("[BidClient] : Created."); | log.debug("[BidClient] : Created."); | System.out.println("[BidClient] : creating EntityManager..."); | em = f.createEntityManager(); | System.out.println("[BidClient] : Created."); | log.debug("[BidClient] : Created."); | | | em.getTransaction().begin(); | | | try { | System.out.println("[BidClient] : creating a Bidder..."); | Bidder bidder = new Bidder(); | | bidder.setBidderName("Bidder No 1"); | bidder.setBidSessionId(1); | | | em.persist(bidder); | em.getTransaction().commit(); | System.out.println("[BidClient] : Bidder created and commited."); | log.debug("[BidClient] : Bidder created and commited."); | | } catch (Exception ex) { | em.getTransaction().rollback(); | } | | System.out.println("[BidClient] : Bidder person created and persisted successfully."); | log.debug("[BidClient] : Bidder person created and persisted successfully."); | | } catch (RuntimeException e) { | | e.printStackTrace(); | | } finally { | | | | } | | | System.out.println("[BidClient] : closing entity manager and factory..."); | log.debug("[BidClient] : closing entity manager and factory..."); | em.close(); | //f.close(); | System.out.println("[BidClient] : Closed."); | log.debug("[BidClient] : Closed."); | | } | | | } | Please can help me. Thank you very much in advance! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4198398#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...