[hibernate-issues] [Hibernate-JIRA] Resolved: (HHH-5087) A @ManyToOne field on the same entity class is null when 2nd level cache is enabled

A @ManyToOne field on the same entity class is null when 2nd level cache is enabled ----------------------------------------------------------------------------------- Key: HHH-5087 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5087 Project: Hibernate Core Issue Type: Bug Components: caching (L2) Affects Versions: 3.3.0.CR1, 3.5.0-Final Reporter: Joseph Pachod Assignee: Gail Badner Attachments: demos.tar.gz The issue is based on this discussion https://forum.hibernate.org/viewtopic.php?p=2350265 which shows how to have a List with the index managed by Hibernate. The example given involves two distinct entities classes, for example ParentEntity.class et ChildEntity.class. I tried to use it as well for a List containing the same entity, like that (see attachment for more details): public class RecursiveListItem { (..) public void setParent(final RecursiveListItem parent) { this.parent = parent; } public RecursiveListItem getParent() { return parent; } public static final String RECURSIVELISTITEM_ONETOMANY_INDEX_COLUMN_NAME = "recursivelistitem_position"; public static final String RECURSIVELISTITEM_ONETOMANY_JOIN_COLUMN_NAME = "recursivelistitem_id"; @ManyToOne @JoinColumn(name = RECURSIVELISTITEM_ONETOMANY_JOIN_COLUMN_NAME, insertable = false, updatable = false) private RecursiveListItem parent; @SuppressWarnings("unused") @Column(name = RECURSIVELISTITEM_ONETOMANY_INDEX_COLUMN_NAME, insertable = false, updatable = false) private Integer position; @OneToMany(fetch = FetchType.LAZY) @JoinColumn(name = RecursiveListItem.RECURSIVELISTITEM_ONETOMANY_JOIN_COLUMN_NAME) @org.hibernate.annotations.IndexColumn(name = RecursiveListItem.RECURSIVELISTITEM_ONETOMANY_INDEX_COLUMN_NAME) private List<RecursiveListItem> children = new ArrayList<RecursiveListItem>(); (...) } In my test case, I do : EntityManager entityManager = entityManagerFactory.createEntityManager(); RecursiveListItem parent = new RecursiveListItem(); RecursiveListItem child = new RecursiveListItem(); persist(entityManager, parent); persist(entityManager, child); parent.getChildren().add(child); child.setParent(parent); persist(entityManager, parent); persist(entityManager, child); entityManager.close(); entityManager = entityManagerFactory.createEntityManager(); RecursiveListItem childFound = entityManager.find(RecursiveListItem.class, child.getId()); assertNotNull(childFound); assertNotNull(childFound.getParent()); The last line works when the 2nd level cache and fails otherwise. The issue applies both for 3.5 and 3.3.0.CR1. In the attached file I put two maven enabled eclipse projects, on for 3.5 and one for 3.3.0.CR1. Thanks in advance best regards joseph ps : I'll be on vacation until next Monday (April 12)