[hibernate-issues] [Hibernate-JIRA] Created: (HHH-7236) Natural-id : NullPointerException after persisting null String value, if using @NaturalIdCache

[Guenther Demetz (JIRA)]

Natural-id : NullPointerException after persisting null String value, if using @NaturalIdCache
----------------------------------------------------------------------------------------------

                 Key: HHH-7236
                 URL: https://hibernate.onjira.com/browse/HHH-7236
             Project: Hibernate ORM
          Issue Type: Bug
          Components: caching (L2), core
    Affects Versions: 4.1.2
            Reporter: Guenther Demetz


Following new matrix testmethod 

{code:title=org.hibernate.test.naturalid.mutable.cached.CachedMutableNaturalIdTest.java|borderStyle=solid}
        @Test
	public void testNaturalIdPersistNullValue() {
		Session session = openSession();
		session.beginTransaction();
		Another it = new Another();
		it.setName(null);
		session.save( it );
		session.getTransaction().commit(); // throws NPE
		session.close();
	}
{code}

raises:

java.lang.NullPointerException
	at org.hibernate.type.descriptor.java.AbstractTypeDescriptor.extractHashCode(AbstractTypeDescriptor.java:88)
	at org.hibernate.type.AbstractStandardBasicType.getHashCode(AbstractStandardBasicType.java:201)
	at org.hibernate.type.AbstractStandardBasicType.getHashCode(AbstractStandardBasicType.java:205)
	at org.hibernate.cache.spi.NaturalIdCacheKey.<init>(NaturalIdCacheKey.java:79)
	at org.hibernate.engine.internal.StatefulPersistenceContext$1.managedSharedCacheEntries(StatefulPersistenceContext.java:1801)
	at org.hibernate.engine.internal.StatefulPersistenceContext$1.manageSharedNaturalIdCrossReference(StatefulPersistenceContext.java:1792)
	at org.hibernate.action.internal.AbstractEntityInsertAction.handleNaturalIdPostSaveNotifications(AbstractEntityInsertAction.java:198)
	at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:130)
	at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:362)
	at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:354)
	at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:275)
	at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:326)
	at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:52)
	at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1181)
	at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:379)
	at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit(JdbcTransaction.java:101)
	at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:175)
	at org.hibernate.test.naturalid.mutable.cached.CachedMutableNaturalIdTest.testNaturalIdPersistNullValue(CachedMutableNaturalIdTest.java:127)
	...

N.B.: The exception does not happen without the @NaturalIdCache annotation

Proposed solution: see pull request



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