[jboss-jira] [JBoss JIRA] (WFLY-946) Hibernate NullPointerException while having a MappedSuperclass with @version attribute

[Scott Marlow (JIRA)]

    [ https://issues.jboss.org/browse/WFLY-946?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12779245#comment-12779245 ] 

Scott Marlow commented on WFLY-946:
-----------------------------------

We upgraded to Hibernate 4.3.0.x recently.  Can you try to reproduce the NPE using the WildFly 8 nightly build?  The link is [https://community.jboss.org/thread/224262].

If you can reproduce, can you create a https://hibernate.onjira.com/browse/HHH jira for Hibernate.  We can then link WFLY-946 to the new HHH issue and close WFLY-946 as a duplicate.


                
> Hibernate NullPointerException while having a MappedSuperclass with @version attribute
> --------------------------------------------------------------------------------------
>
>                 Key: WFLY-946
>                 URL: https://issues.jboss.org/browse/WFLY-946
>             Project: WildFly
>          Issue Type: Bug
>          Components: JPA / Hibernate
>         Environment: Cent O.S. 6.2, JDK1.7.0_05
>            Reporter: Sai Krish
>            Assignee: Scott Marlow
>   Original Estimate: 1 hour
>  Remaining Estimate: 1 hour
>
> 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.

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