Sai Krish created AS7-5885: ------------------------------ Summary: Hibernate NullPointerException while having a MappedSuperclass with @version attribute Key: AS7-5885 URL: https://issues.jboss.org/browse/AS7-5885 Project: Application Server 7 Issue Type: Bug Components: JPA / Hibernate Affects Versions: 7.1.1.Final Environment: Cent O.S. 6.2, JDK1.7.0_05 Reporter: Sai Krish Assignee: Scott Marlow I am planning to have all the Entities in my project extend the common attribute from a BaseEntity. Currently I have only one field named Version in the base entity. I have marked the BaseEntity with the annotation of @MappedSuperclass as per the JPA standard. Everything works fine when I have only one Extended class (say Customer). But when I included an additional extended class, the EJB application's deployment failed with a NullPointerException. Stack trace for the same is given below org.jboss.msc.service.StartException in service jboss.persistenceunit."Test.jar#primary": Failed to start service at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1767) [jboss-msc-1.0.2.GA.jar:1.0.2.GA] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [rt.jar:1.7.0_05] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.7.0_05] at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_05] Caused by: java.lang.NullPointerException at org.hibernate.ejb.metamodel.AttributeFactory$6.resolveMember(AttributeFactory.java:947) at org.hibernate.ejb.metamodel.AttributeFactory.determineAttributeMetadata(AttributeFactory.java:423) at org.hibernate.ejb.metamodel.AttributeFactory.buildVersionAttribute(AttributeFactory.java:153) at org.hibernate.ejb.metamodel.MetadataContext.applyVersionAttribute(MetadataContext.java:301) at org.hibernate.ejb.metamodel.MetadataContext.wrapUp(MetadataContext.java:206) at org.hibernate.ejb.metamodel.MetamodelImpl.buildMetamodel(MetamodelImpl.java:64) at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:91) at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:904) at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:889) at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:73) at org.jboss.as.jpa.service.PersistenceUnitServiceImpl.createContainerEntityManagerFactory(PersistenceUnitServiceImpl.java:162) at org.jboss.as.jpa.service.PersistenceUnitServiceImpl.start(PersistenceUnitServiceImpl.java:85) at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.2.GA.jar:1.0.2.GA] at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.2.GA.jar:1.0.2.GA] ... 3 more I could not find any workarounds for it. I have attached the sample code that can be used to reproduce the issue. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira