[eclipselink-users] If JPA Cache is enabled it's possible to get more En

["helmut.at.work" <helmut.at.work@xxxxxxxxx>]

Strange behavior: If JPA Cache is enabled it's possible to get more Entitys
as stored in the underlying database. 
I made an example here:  https://github.com/helmut-at-work/test-jpacache
<https://github.com/helmut-at-work/test-jpacache>  

Test: 
@RunWith(Arquillian.class)
public class ManagerArquillianTest {

    @EJB
    Manager manager;
....
    @Test
    public void testOneToManyWithDoubleChildObjects() throws Exception {
        System.out.println("Test a simple OneToMany with 1 parent and 3
childs, where 2 childs are the same object.");

        ParentNode pdetached = new ParentNode();

        ChildNode c1 = new ChildNode();
        c1.setParentNode(pdetached);
        pdetached.getChilds().add(c1);

        ChildNode c2 = new ChildNode();
        c2.setParentNode(pdetached);
        pdetached.getChilds().add(c2);
        //add the same object twice (not sure what happen)
        pdetached.getChilds().add(c2);

        //What is to be expected? 3 or 2 Rows in database table childnode?
        manager.saveParentNode(pdetached);
        //Let's see what is in the database with simple SQL
        int count = countChildNodes();
        //We get 2 rows in childnode!
        assertEquals(2, count);

        //Ok let's read with jpa and cache active
        ParentNode pread = manager.getParentNode();
        // I think we should get 2 childnotes now, right?
        assertEquals(2, pread.getChilds().size());
        //When we disable the cache in persistence.xml this test will pass.
...

Have someone see this before, or see the error I possible made?



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