Not allowed to create transaction on shared EntityManager - use Spring transactions or EJB CMT

Siddhartha Negi

I guess the problem here is that although you have defined the bean for the transaction manager, you haven't annotated the create() method with @Transactional which enables spring transactions.

Also remove the entityManager.getTransaction().commit(); statement as now all the transaction management will be handled by spring, if you leave the statement as it is then you will get the same error again.

Injecting EntityManagerFactory instead of EntityManager and javax.transaction.Transactional annotation on method solved my issue as shown below.

//Autowire EntityManagerFactory
@PersistenceUnit(unitName = "readwrite.config")
private EntityManagerFactory entityManagerFactory;

//Use below code on create/update
EntityManager entityManager = entityManagerFactory.createEntityManager();

if (!ObjectUtils.isEmpty(entity) && !entityManager.contains(entity)) {