I'm just playing with Hibernate 5.1.1 as it might have solved our bytecode issues. One thing I immediately realize is that instrumented classes do not extend from ManagedEntity or ManagedComposite anymore (which used to be set in Hibernate 5.1.0).

As I'm encountering null pointer issues during a session commit in Hibernate Search and extracting these issues to a test case is quite tricky, may I ask how serious the absence of the marker interfaces are?