Hi hongzhang, the instructions to reproduce the problem are as follows: 1) Download and install Glassfish v2 https://glassfish.dev.java.net/downloads/v2-b48.html. I am using the Windows version build 48. 2) Download and extract JBoss Seam 1.2.1 GA http://labs.jboss.com/jbossseam/download. On my computer Glassfish is in c:\glassfish and Seam is in c:\java\jboss-seam-1.2.1.GA. 3) Start glassfish and its JavaDB if not started. Using the command line this is: | c:\glassfish\bin\asadmin start-domain | c:\glassfish\bin\asadmin start-database | 4) Build the Glassfish example in seam using ant: | cd c:\java\jboss-seam-1.2.1.GA\examples\glassfish | c:\glassfish\bin\asant | 5) Deploy the ear file to Glassfish: | cd c:\java\jboss-seam-1.2.1.GA\examples\glassfish | c:\glassfish\bin\asadmin deploy build\jboss-seam-glassfish.ear | With this step, the application should work fine and you should be able to login via a web browser http://localhost:8080/jboss-seam-glassfish/. Username demo, password demo. Note that due to a bug in the example, it will not work successfully with Firefox. Now to reproduce the problems I am having: 1) You will need to add the following component config to your components.xml file located in c:\java\jboss-seam-1.2.1.GA\examples\glassfish\resources\WEB-INF: | <core:entity-manager-factory name="dbFactory" | persistence-unit-name="bookingDatabase"/> | <core:managed-persistence-context name="entityManager" | auto-create="true" entity-manager-factory="#{dbFactory}"/> | <core:entity-converter entity-manager="${entityManager}"/> | 2) Add a Hibernate JTA factory by replacing your persistence.xml file content located in c:\java\jboss-seam-1.2.1.GA\examples\glassfish\resources\META-INF with: | <?xml version="1.0" encoding="UTF-8"?> | <persistence xmlns="http://java.sun.com/xml/ns/persistence" | xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | xsi:schemaLocation="http://java.sun.com/xml/ns/persistence | http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" | version="1.0"> | <persistence-unit name="bookingDatabase" transaction-type="JTA"> | <provider>org.hibernate.ejb.HibernatePersistence</provider> | <jta-data-source>jdbc/__default</jta-data-source> | <properties> | <property name="hibernate.dialect" | value="org.hibernate.dialect.DerbyDialect"/> | <property name="hibernate.hbm2ddl.auto" value="create-drop"/> | <property name="hibernate.show_sql" value="true"/> | <property name="hibernate.transaction.flush_before_completion" value="true"/> | <property name="hibernate.transaction.manager_lookup_class" | value="org.hibernate.transaction.SunONETransactionManagerLookup"/> | <property name="hibernate.cache.provider_class" | value="org.hibernate.cache.HashtableCacheProvider"/> | </properties> | </persistence-unit> | </persistence> | 3) Clean, rebuild and redeploy the example: | cd c:\java\jboss-seam-1.2.1.GA\examples\glassfish | c:\glassfish\bin\asant clean | c:\glassfish\bin\asant | c:\glassfish\bin\asadmin deploy build\jboss-seam-glassfish.ear | This should also allow the app to work. 4) However, try and redeploy again without making any changes: | cd c:\java\jboss-seam-1.2.1.GA\examples\glassfish | c:\glassfish\bin\asadmin deploy build\jboss-seam-glassfish.ear | You will find that the application will not start complaining of the errors I indicated in my previous posts. The only way I have found to get the example working again is to undeploy, restart glassfish and then deploy: | cd c:\java\jboss-seam-1.2.1.GA\examples\glassfish | c:\glassfish\bin\asadmin undeploy jboss-seam-glassfish | c:\glassfish\bin\asadmin stop-domain | c:\glassfish\bin\asadmin start-domain | c:\glassfish\bin\asadmin deploy build\jboss-seam-glassfish.ear | At the request of epbernard I tried using the latest version of HEM with the example but that didn't seem to make much difference. I hope all these instructions make sense to you! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4055679#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...