title: SPRING JPA with Hibernate updating all entity instances even if save is called with one entity
body: <p>I am using Spring JPARepository with hibernate and have one question on entity update.
  I am calling jparepository.save(entity) by passing a single entity but in the trace logs i can see update statements issued for other rows in the database also.
  Before calling save , i have a findAll and the value of some entities are getting changed.
  but i am passing only one entity for save , but still all the updated entities are getting saved.
  Can you please provide any info on this.</p>