I'm persisting two entities, the second one has a unique constraint but when I try to break that constraint a javax.persistence.RollbackException: Transaction marked as rollbackOnly is thown so the first persisted entity is not rolled back. Im using the @Transactional Spring annotation, anyway here is the code , I'd appreciate very much any help :

Spring application context :
.
.
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>

<tx:annotation-driven transaction-manager="transactionManager" />

Service class method:

Image i= new Image();
i.setImagePath("asdfads");

Book b= new Book();
b.setTitle("aaa");

try {
//entityManager.persist(presInd);
//entityManager.persist(verbo);
entityManager.persist(i);
entityManager.persist(b);

//throw new java.lang.Exception();



return true;

} catch (Exception e) {
// TODO: handle exception
System.out.println(e.getMessage());
System.out.println("calling rooback");

Exception :
javax.persistence.RollbackException: Transaction marked as rollbackOnly