Strange Jackson exception being thrown when serializing Hibernate object

Question

Jackson is throwing a weird exception that I don\'t know how to fix. I\'m using Spring, Hibernate and Jackson.

I have already considered that lazy-loading is causing

Answer 1

I had the same error message from spring's @RestController. My rest controller class was using spring's JpaRepository class and by replacing repository.getOne(id) method call with repository.findOne(id) problem was gone.