java - Resolving the JPA/Hibernate EntityNotFoundException -

i've run weird situation here. when try delete set of entities & later try add set of entities, may or may not have same elements again,i seem getting below exception. whole stack trace isn't required doesn't much.

javax.persistence.entitynotfoundexception: deleted entity passed persist [com.test.myentity#<null>] 

to make myself more clear, let me give more detailed explanation.

this entity.

@entity @table(name = "my_entity") @sequencegenerator(name = "my_enty_seq", sequencename = "my_entity_seq") public class myentity {      private long id;      @id     @generatedvalue(strategy = generationtype.auto, generator = "my_enty_seq")     @column(name = "id", unique = true, nullable = false, precision = 12, scale = 0)     public long getid() {         return this.id;     }      // other methods & variables not relevant here. } 

and class playing entities.

public class myentityserviceimpl implements myentityservice {      public void updatemyentities(list<myentity> newentities) {          // delete old items         list<myentity> oldentities = mydao.getallentities();         mydao.delete(oldentities); // mydao extends genericdaojpawithoutjpatemplate, hence, delete available in it.          // add new items         mydao.store(newentities); // mentioned exception.     }      // other non-relevant stuffs } 

the scenario mentioned exception on store() method when there common myentity object, present in both oldentities , newentities lists.

i've tried quite few things make work, nothing me overcome problem. adding fetchtype.eager & cascasetype.all, cascasetype.persist didn't work. jpa entitymanager doesn't seem have commit() method either, use after delete() & before store() method. i've tried interchanging store() persist()(though store internally calls persist()) too!

note:- requirement delete old list , insert fresh list, comparing elements , adding new ones tedious(the list can pretty huge @ times).

the exception quite clear think: told session delete entity x , @ same time store entity x. poor thing confused , doesn't know do.

do session.flush() possibly via commit before persisting new/old/deleted entity.

edit:

if doesn't trick, need insert in new session. problem might still be, don't have transient entity, 1 deleted. might have copy data new instance.