Hey there,

For [the last round of statements to not get flushed] to happen, the inserts need to be inside in a transaction opened by the stateless session

I am not sure why this is a requirement. In fact, using the stateless session the “conventional way”, meaning purely within a transaction managed by the stateless session, works fine for all jdbc batch sizes:

statelessSession.getTransaction().begin();
// do stuff
statelessSession.getTransaction().commit();

But in the example I provided, the batch size is 2, and the third entity is lost (the test fails).