Hi, I'm triaging the latest issues and I stumbled upon this one: https://hibernate.atlassian.net/browse/HHH-13002 . This particular issue happens because our OSGi stuff enforce an OsgiJtaPlatform even if there is no JTA transaction manager. I'm not very familiar with JTA in ORM but I find suspicious that StatelessSession doesn't check somehow that a JTA transaction manager is in motion before checking things with it namely here: https://github.com/hibernate/hibernate-orm/blob/master/hibernate-core/src... In SessionFactoryImpl, we somehow check that the JTA transaction manager is OK here: https://github.com/hibernate/hibernate-orm/blob/master/hibernate-core/src... I suppose that's why standard sessions are not affected. Not sure what the right fix would be so I thought I might as well ask. Thanks for any insights. -- Guillaume