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                                                    <td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <p style="margin: 10px 0 0; margin-top: 0"><a href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058:28daf002-1491-4267-ba50-a35db3a78c48" class="user-hover" rel="lcottereau" accountid="557058:28daf002-1491-4267-ba50-a35db3a78c48" style="color: #3b73af; text-decoration: none">Laurent Cottereau</a>, I am not seeing a unique index violation with your test case.</p> <p style="margin: 10px 0 0">I am seeing the following with master, 5.3, and 5.1 branches:</p> 
                                                        <div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
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                                                                <pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
javax.persistence.PersistenceException: org.hibernate.PropertyValueException: not-<span class="code-keyword" style="color: #000091">null</span> property references a <span class="code-keyword" style="color: #000091">null</span> or <span class="code-keyword" style="color: #000091">transient</span> value : org.hibernate.jpa.test.mapping.UnidirectionalOneToManyUniqueConstraintOrderColumnTest$ChildData._children_parentIdBackref
        at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:154)
        at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:181)
        at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:188)
        at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:811)
        at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:789)
        at org.hibernate.jpa.test.mapping.UnidirectionalOneToManyUniqueConstraintOrderColumnTest.lambda$testRemovingOneAndAddingTwoElements$4(UnidirectionalOneToManyUniqueConstraintOrderColumnTest.java:116)
        at org.hibernate.testing.transaction.TransactionUtil.doInJPA(TransactionUtil.java:210)
        at org.hibernate.testing.transaction.TransactionUtil.doInJPA(TransactionUtil.java:251)
        at org.hibernate.jpa.test.mapping.UnidirectionalOneToManyUniqueConstraintOrderColumnTest.testRemovingOneAndAddingTwoElements(UnidirectionalOneToManyUniqueConstraintOrderColumnTest.java:108)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
        at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
        at org.hibernate.testing.junit4.ExtendedFrameworkMethod.invokeExplosively(ExtendedFrameworkMethod.java:45)
        at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
        at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
        at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298)
        at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.lang.<span class="code-object" style="color: #910091">Thread</span>.run(<span class="code-object" style="color: #910091">Thread</span>.java:748)
Caused by: org.hibernate.PropertyValueException: not-<span class="code-keyword" style="color: #000091">null</span> property references a <span class="code-keyword" style="color: #000091">null</span> or <span class="code-keyword" style="color: #000091">transient</span> value : org.hibernate.jpa.test.mapping.UnidirectionalOneToManyUniqueConstraintOrderColumnTest$ChildData._children_parentIdBackref
        at org.hibernate.engine.internal.Nullability.checkNullability(Nullability.java:111)
        at org.hibernate.engine.internal.Nullability.checkNullability(Nullability.java:55)
        at org.hibernate.action.internal.AbstractEntityInsertAction.nullifyTransientReferencesIfNotAlready(AbstractEntityInsertAction.java:115)
        at org.hibernate.action.internal.AbstractEntityInsertAction.makeEntityManaged(AbstractEntityInsertAction.java:124)
        at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:289)
        at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:263)
        at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:250)
        at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:340)
        at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:289)
        at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:196)
        at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:139)
        at org.hibernate.event.internal.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:192)
        at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:135)
        at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:62)
        at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:804)
        ... 20 more
</pre> 
                                                            </div>
                                                        </div> <p style="margin: 10px 0 0">Please confirm the behavior that you are seeing.</p> </td> 
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{
  "@context": "http://schema.org",
  "@type": "EmailMessage",
  "description": "View Issue",
  "potentialAction": {
    "@type": "ViewAction",
        "target": "https://hibernate.atlassian.net/browse/HHH-13338?inbox=true&focusedCommentId=104977&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-104977",
    "name": "View Comment"
      },
  "publisher": {
    "@type": "Organization",
    "name": "Atlassian",
    "url": "https://www.atlassian.com"
  }
}
</script> 
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