AuditException / NullPointerException when loading audited entity with embeddable referencing non-audited entity in Hibernate

Environment

• Red Hat JBoss Enterprise Application Platform (EAP) 7.0
• Hibernate 5.0

Issue

• Defined an audited entity which has an association to an audited embeddable which, in turn, contains a reference to a non-audited entity

      @Audited
      public class Parent {
          ...
          @ElementCollection
          @CollectionTable(name = "items", joinColumns = @JoinColumn(name = "PRODUCT_ID"))
          @OrderColumn(name = "ORDER_COL")
          @Audited
          private List<Item> items = new ArrayList<Item>();
      }
  
      @Embeddable
      @Audited
      public class Item {
          ...
          @ManyToOne
          @Audited(targetAuditMode = RelationTargetAuditMode.NOT_AUDITED)
          private Type type;
      }
  

• The following exception is raised when loading the "parent" entity

  org.hibernate.envers.exception.AuditException: java.lang.NullPointerException
      	at org.hibernate.envers.internal.entities.mapper.relation.component.MiddleEmbeddableComponentMapper.mapToObjectFromFullMap(MiddleEmbeddableComponentMapper.java:55)
      	at org.hibernate.envers.internal.entities.mapper.relation.lazy.initializor.ListCollectionInitializor.addToCollection(ListCollectionInitializor.java:66)
      	...
      	at org.hibernate.envers.internal.reader.FirstLevelCache.putOnEntityNameCache(FirstLevelCache.java:87)
      	at org.hibernate.envers.internal.entities.EntityInstantiator.createInstanceFromVersionsEntity(EntityInstantiator.java:111)
      	at org.hibernate.envers.internal.entities.EntityInstantiator.addInstancesFromVersionsEntities(EntityInstantiator.java:164)
      	at org.hibernate.envers.query.internal.impl.AbstractAuditQuery.applyProjections(AbstractAuditQuery.java:336)
      	at org.hibernate.envers.query.internal.impl.EntitiesAtRevisionQuery.list(EntitiesAtRevisionQuery.java:128)
      	at org.hibernate.envers.query.internal.impl.AbstractAuditQuery.getSingleResult(AbstractAuditQuery.java:111)
      	at org.hibernate.envers.internal.reader.AuditReaderImpl.find(AuditReaderImpl.java:124)
      	at org.hibernate.envers.internal.reader.AuditReaderImpl.find(AuditReaderImpl.java:93)
      	at org.hibernate.envers.internal.reader.AuditReaderImpl.find(AuditReaderImpl.java:87)
      	...
  

Resolution

This issue is resolved as part of:

• This content is not included.EAP 7.0 cumulative patch (CP) 9¹

Root Cause

This is a known defect (Content from hibernate.atlassian.net is not included.HHH-11215).

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