Error related with JPA EntityGraph in Hibernate 6.6.X

Hibernate ORM
1

Hi all,

my issue was original posted to Spring Boot issues, but it seems to be hibernate related.
It seems that after upgrading to Hibernate 6.6.2-Final (part of spring boot 3.4), there is a Hibernate related error when a transactional method, after saving a row, tries to retrieve some data from a repository method using EntityGraph. This worked in Hibernate 6.5.3-Final (part of spring boot 3.3)

I have a small spring boot project to demonstrate the error

The error i am getting is

java.lang.NullPointerException: Cannot invoke "org.hibernate.engine.spi.EntityEntry.getMaybeLazySet()" because "entityEntry" is null

and also

an assertion failure occurred (this may indicate a bug in Hibernate, but is more likely due to unsafe use of the session): org.hibernate.AssertionFailure: possible non-threadsafe access to the session

As other people mentioned in the original post, this might have to do with using objects that are not created/managed by hibernate. Since i can not identify all such cases and fix them, i am wondering if there is something else i can do (apart from downgrading Hibernate to the version that this works)

Thank you in advance for your time

2

Here is also some JPA code to reproduce the issue (as provided as a reply in the reported issue in Spring Data)


long userId = 1;

Payment payment = new Payment();

var invoice = new Invoice();
invoice.setId(1L);
payment.setInvoice(invoice);

AppUser appUser = new AppUser();
appUser.setId(userId);
payment.setCreatedFrom(appUser);

entityManager.persist(payment);

Invoice invoiceLoaded = (Invoice) entityManager.createQuery("SELECT i FROM Invoice i WHERE i.id = ?1")
		.setParameter(1, invoice.getId()).getSingleResult();

jakarta.persistence.EntityGraph<StudentFeesToInvoice> entityGraph = entityManager
		.createEntityGraph(StudentFeesToInvoice.class);
entityGraph.addSubgraph("invoice")
		.addSubgraph("payments")
		.addAttributeNodes("createdFrom");

// failure happens here
entityManager.createQuery("SELECT s FROM StudentFeesToInvoice s WHERE id = ?1")
		.setHint("jakarta.persistence.fetchgraph", entityGraph)
		.setParameter(1, invoiceLoaded.getId()).getResultList();
3

Since you seem to have some code which reproduces the issue using only Hibernate (JPA), I would suggest isolating that in a simple reproducer test case and creating a new bug report in our issue tracker.