org.springframework.orm.jpa.JpaSystemException: Unable to access lob stream; nested exception is org.hibernate.HibernateException: Unable to access lob stream
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.convertHibernateAccessException(HibernateJpaDialect.java:331) ~[spring-orm-5.3.16.jar!/:5.3.16]
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:233) ~[spring-orm-5.3.16.jar!/:5.3.16]
at org.springframework.orm.jpa.AbstractEnti
=> SERVICE 부분에 TRANSACTIONAL 어노테이션 붙여주면 된다.