We have a Entity with an @EmbeddedId field. The embedded class has no properties at all but extends a @MappedSuperclass which only one property.

If hibernate boots up it logs:

ERROR MetadataContext - HHH015011: Unable to locate static metamodel field : annotation.Entity_#ref
ERROR MetadataContext - HHH015011: Unable to locate static metamodel field : pojo.Ref_#id

In the attached example i have created an @Entity with an @EmbeddedId not extending some class. For this entity the meta model looks fine.