[hibernate-issues] [Hibernate-JIRA] Created: (HHH-4449) NPE during inserting new audited entity with reference to another proxy entity if proxy.lazyInitializer.session is null

[Eugene Goroschenya (JIRA)]

NPE during inserting new audited entity with reference to another proxy entity if proxy.lazyInitializer.session is null
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                 Key: HHH-4449
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4449
             Project: Hibernate Core
          Issue Type: Bug
          Components: envers
    Affects Versions: 3.5.0.Beta-1, 3.3.2
            Reporter: Eugene Goroschenya


NPE during inserting new audited entity with reference to another proxy entity if proxy.lazyInitializer.session is null

java.lang.NullPointerException
	at org.hibernate.envers.tools.Tools.getTargetFromProxy(Tools.java:74)
	at org.hibernate.envers.event.AuditEventListener.generateBidirectionalCollectionChangeWorkUnits(AuditEventListener.java:108)
	at org.hibernate.envers.event.AuditEventListener.onPostInsert(AuditEventListener.java:152)
	at org.hibernate.action.EntityIdentityInsertAction.postInsert(EntityIdentityInsertAction.java:113)
	at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:89)
	at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)
	at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:321)
	at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:204)
	at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:130)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:117)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
	at com.jcatalog.core.persistence.hibernate.HibernateSaveOrUpdateListener.onSaveOrUpdate(HibernateSaveOrUpdateListener.java:31)
	at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:535)
	at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:527)
	at org.hibernate.engine.CascadingAction$5.cascade(CascadingAction.java:241)
	at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:292)
	at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:240)
	at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:193)
	at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:320)
	at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:266)
	at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:243)
	at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:193)
	at org.hibernate.engine.Cascade.cascade(Cascade.java:154)
	at org.hibernate.event.def.AbstractSaveEventListener.cascadeAfterSave(AbstractSaveEventListener.java:479)
	at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:357)
	at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:204)
	at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:130)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:117)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
	at com.jcatalog.core.persistence.hibernate.HibernateSaveOrUpdateListener.onSaveOrUpdate(HibernateSaveOrUpdateListener.java:31)
	at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:535)
	at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:527)
	at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:523)
	at org.springframework.orm.hibernate3.HibernateTemplate$16.doInHibernate(HibernateTemplate.java:747)
	at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:419)
	at org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374)
	at org.springframework.orm.hibernate3.HibernateTemplate.saveOrUpdate(HibernateTemplate.java:744)
	at com.jcatalog.jsfeditor.facade.HibernateEditorFacade.save(HibernateEditorFacade.java:33)

It seems It happens when hibernate session was cleared so proxy.lazyInitializer.session is set to null but this object can be used later as refernce in other entity.
Just for information such use case works OK with hibernate without Envers as far as we not try call getters of proxy with null session.

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