Robert,

I think I found a bug.

I have the following model:

public class A {

}

public class B extends A {

}

public class C {

@Column(nullable = true)
@ManyToOne(optional = true)
private B parent;
}

If an instance of class C get persisted with no parent (parent is null) then the next time the DB tries to startup it throws a "Type for discriminator value [] was not found" error. Since the parent is null, so is its discriminator value. There is no class to discriminate.

Thanks