[hibernate-issues] [Hibernate-JIRA] Resolved: (HHH-3923) Enver throws Nullpointer exception with a self reference entities

[Adam Warski (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-3923?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Adam Warski resolved HHH-3923.
------------------------------

         Assignee: Adam Warski
       Resolution: Cannot Reproduce
    Fix Version/s: 3.5

I tried the mapping using Envers trunk and there are no exceptions, auditing works as expected.

> Enver throws Nullpointer exception with a self reference entities
> -----------------------------------------------------------------
>
>                 Key: HHH-3923
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3923
>             Project: Hibernate Core
>          Issue Type: Bug
>          Components: envers
>    Affects Versions: 3.3.1
>         Environment: Hibernate Version: 3.3.1.GA
> Database: Mysql 5.0
>            Reporter: Tahseen Ur Rehman
>            Assignee: Adam Warski
>            Priority: Blocker
>             Fix For: 3.5
>
>
> @Entity(name = "category")
> @Audited
> public class Category {
> 	@Id
> 	@GeneratedValue(strategy = GenerationType.AUTO)
> 	private int id;
> 	private String name;
> 	@ManyToOne
> 	private Category parent;
> 	@OneToMany(mappedBy = "parent")
> 	private List<Category> childerns = new ArrayList<Category>();
>         
>         ....
> }
> Exception:
> Exception in thread "main" java.lang.ExceptionInInitializerError
> 	at com.carbonetworks.footprint.Footprint.initHibernate(Footprint.java:125)
> 	at com.carbonetworks.footprint.Footprint.init(Footprint.java:73)
> 	at com.carbonetworks.footprint.Main.main(Main.java:36)
> Caused by: javax.persistence.PersistenceException: [PersistenceUnit: footprint] 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 com.carbonetworks.footprint.Footprint.initHibernate(Footprint.java:109)
> 	... 2 more
> Caused by: org.hibernate.HibernateException: could not init listeners
> 	at org.hibernate.event.EventListeners.initializeListeners(EventListeners.java:205)
> 	at org.hibernate.cfg.Configuration.getInitializedEventListeners(Configuration.java:1338)
> 	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1327)
> 	at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:867)
> 	at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:669)
> 	... 6 more
> Caused by: java.lang.NullPointerException
> 	at org.hibernate.envers.configuration.metadata.CollectionMetadataGenerator.addOneToManyAttached(CollectionMetadataGenerator.java:164)
> 	at org.hibernate.envers.configuration.metadata.CollectionMetadataGenerator.addCollection(CollectionMetadataGenerator.java:150)
> 	at org.hibernate.envers.configuration.metadata.AuditMetadataGenerator.addValue(AuditMetadataGenerator.java:141)
> 	at org.hibernate.envers.configuration.metadata.AuditMetadataGenerator.addProperties(AuditMetadataGenerator.java:161)
> 	at org.hibernate.envers.configuration.metadata.AuditMetadataGenerator.generateSecondPass(AuditMetadataGenerator.java:385)
> 	at org.hibernate.envers.configuration.EntitiesConfigurator.configure(EntitiesConfigurator.java:96)
> 	at org.hibernate.envers.configuration.AuditConfiguration.<init>(AuditConfiguration.java:86)
> 	at org.hibernate.envers.configuration.AuditConfiguration.getFor(AuditConfiguration.java:99)
> 	at org.hibernate.envers.event.AuditEventListener.initialize(AuditEventListener.java:249)
> 	at org.hibernate.event.EventListeners$1.processListener(EventListeners.java:198)
> 	at org.hibernate.event.EventListeners.processListeners(EventListeners.java:181)
> 	at org.hibernate.event.EventListeners.initializeListeners(EventListeners.java:194)
> 	... 10 more

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