Request processing failed; Nested exception is org.springframework.dao.InvalidDataAccessApiUsageException:Multiple representations of the same Entity resolution method

1. Error messages

Request processing failed; Nested exception is org.springframework.dao.InvalidDataAccessApiUsageException:Multiple representations of the same Entity

2. Cause of Error

Because an attempt is made to assign an already persistent object or detached object value to a property of a new transient object. The transient object that caused the last save or merge to report the error.

3. Solutions

This should be a bug in Hibernate itself, which has been resolved in version 4.2.15.

1, update hibernate version to 4.2.15 or more

2, add the following properties to hibernate's configuration file:

<property name= "Hibernate.event.merge.entity_copy_observer" >allow</ PROPERTY>

 

If you are using Spring management hibernate, configure

in your spring data source

<prop key= "Hibernate.event.merge.entity_copy_observer" >allow </PROP>

   

Specific reference: http://thinerzq.me/2016/02/01/Multiple-representations-of-the-same-entity-are-being-merged%E8%A7%A3% e5%86%b3%e6%96%b9%e6%b3%95/

　　

Request processing failed; Nested exception is org.springframework.dao.InvalidDataAccessApiUsageException:Multiple representations of the same Entity resolution method