Sample project attached and github clone located at: https://github.com/caspianb/HibernateRefreshTest/tree/HHH-12268
When using batch fetching (e.g. hibernate.default_batch_fetch_size=8), this can cause collections to become incorrectly detached from the session when performing a refresh with lock and cause LazyInitializationExceptions.
Note that this issue occurs when utilizing either EntityManager or Hibernate Session object.
{code}
// OneToMany association Parent->Child
// ManyToOne association Child->Parent
Parent parent = em.find(Parent.class, parentId);
em.createQuery("FROM Child").getResultList();
em.refresh(parent, LockModeType.PESSIMISTIC_WRITE);
//
// There are two issues at this point
//
// This assertion fails
Assert.assertEquals(LockModeType.PESSIMISTIC_WRITE, em.getLockMode(parent));
// This can cause a LazyInitializationException
parent.getChildren().size();
{code} |
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