create EntityManager error -------------------------- Key: JBAS-8036 URL: https://jira.jboss.org/browse/JBAS-8036 Project: JBoss Application Server Issue Type: Bug Security Level: Public (Everyone can see) Environment: JBoss 5.1.0 GA Reporter: Dave Chen create a new persistence unit programmatically and map it to a new datasource without redeploy or server restart. We tried the following in a stateless session bean: Map configOverrides = new HashMap(); EntityManagerFacotry emf = Persistence.createEntityManagerFactory("unit1", configOverrides); But got exception: javax.persistence.PersistenceException: [PersistenceUnit: unit1] Unable to build EntityManagerFactory <persistence-unit name="unit1"> <jta-data-source>java:/dataSource1</jta-data-source> <properties> <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/> <property name="hibernate.hbm2ddl.auto" value="update"/> <property name="hibernate.show_sql" value="false"/> </properties> </persistence-unit> 08:17:58,204 ERROR [STDERR] javax.persistence.PersistenceException: [PersistenceUnit: defaultDataSource] Unable to build EntityManagerFactory 08:17:58,205 ERROR [STDERR] at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:677) 08:17:58,205 ERROR [STDERR] at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:126) 08:17:58,205 ERROR [STDERR] at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:52) -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira