Query.executeUpdate() - No transaction is currently active

[d.frank]

Hi,
I'm having trouble using the method executeUpdate (). An example:

public void update() {
		DefaultTransactionDefinition def = new DefaultTransactionDefinition();
		
		def.setName("updateTx");
		def.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRES_NEW);
		
		TransactionStatus status = txManager.getTransaction(def);
		Query query = entityManager.createQuery(" update Contact c set c.name = 'Daniel' where c.id = '2'");
		query.executeUpdate();
		
		txManager.commit(status);
}

This code ever throw an Exception:

javax.persistence.TransactionRequiredException: 
Exception Description: No transaction is currently active

Any idea what might be happening?