org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: could not initialize proxy [kr.co. ... ] - no SessionCaused by: org.hibernate.LazyInitializationException: could not initialize proxy [kr.co. ... ] - no Session[http-nio-8081-exec-3] WARN o.s.w.s.m.m.a.ExceptionHandlerExceptionResolver - Resolved [org.springframework.http.converter.HttpMessageNotWritableExc..