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                                                    <td class="page-title-pattern-first-line " style="padding: 0; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HHH" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-11853" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-8ed1c383-1052-4250-b40e-b8953c49e595" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-11853" style="color: #3b73af; text-decoration: none">HHH-11853</a> </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Issue Type:</th> 
                                                    <td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-8ed1c383-1052-4250-b40e-b8953c49e595" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"> Bug </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Affects Versions:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 5.2.10 </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Assignee:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Unassigned </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Components:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> hibernate-core </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 04/Jul/2017 04:48 AM </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Environment:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> java version "1.8.0_112" <br> Java(TM) SE Runtime Environment (build 1.8.0_112-b15) <br> Java HotSpot(TM) 64-Bit Server VM (build 25.112-b15, mixed mode) <br> <br> Hibernate Version: 5.2.10.Final <br> <br> Database (Test): H2 1.4.196 <br> </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Labels:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> core hibernate </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Priority:</th> 
                                                    <td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-major-a349a70e-c22a-454d-8359-f6c73be0d7d8" height="16" width="16" border="0" align="absmiddle" alt="Major" style="vertical-align: text-bottom"> Major </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Reporter:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="noblehouse" id="email_noblehouse" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=noblehouse" style="color:#6c797f;; color: #3b73af; text-decoration: none">Andreas Kilian</a> </td> 
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                                    <td class="email-content-main mobile-expand  issue-description-container" style="padding: 0; border-collapse: collapse; border-left: 1px solid #cccccc; border-right: 1px solid #cccccc; border-top: 0; border-bottom: 0; padding: 0 15px 0 16px; background-color: #ffffff; padding-top: 5px; padding-bottom: 10px" bgcolor="#ffffff"> 
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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-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0">I have three entities: Person, City and PersonCity. The PersonCity entity is a mapped M:N table between Peron and City which uses an @EmbeddedId as the primary key attribute. The other entities, Person and City, both use a @OneToMany as a reference back to PersonCity. The mapping of the M:N table is required to store additional information about an association.</p> 
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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">
@Entity
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">class </span>City {
    @Id
    @GeneratedValue
    <span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">Long</span> id;
    <span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">String</span> name;

    @OneToMany(mappedBy = <span class="code-quote" style="color: #009100">"city"</span>)
    <span class="code-keyword" style="color: #000091">private</span> Set&lt;PersonCity&gt; personCitySet = <span class="code-keyword" style="color: #000091">new</span> HashSet&lt;&gt;();

    <span class="code-comment" style="color: #808080">//...
</span>}
</pre> 
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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">
@Entity
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">class </span>Person {
    @Id
    @GeneratedValue
    <span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">Long</span> id;
    <span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">String</span> name;

    @OneToMany(mappedBy = <span class="code-quote" style="color: #009100">"person"</span>, cascade = CascadeType.ALL, orphanRemoval = <span class="code-keyword" style="color: #000091">true</span>)
    <span class="code-keyword" style="color: #000091">private</span> Set&lt;PersonCity&gt; personCitySet = <span class="code-keyword" style="color: #000091">new</span> HashSet&lt;&gt;();

    <span class="code-comment" style="color: #808080">// ...
</span>}
</pre> 
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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">
@Entity
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">class </span>PersonCity {

    @EmbeddedId
    <span class="code-keyword" style="color: #000091">private</span> PersonCityKey id = <span class="code-keyword" style="color: #000091">new</span> PersonCityKey();

    @ManyToOne
    @MapsId(<span class="code-quote" style="color: #009100">"personId"</span>)
    <span class="code-keyword" style="color: #000091">private</span> Person person;
    @ManyToOne
    @MapsId(<span class="code-quote" style="color: #009100">"cityId"</span>)
    <span class="code-keyword" style="color: #000091">private</span> City city;

    <span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">String</span> additionalInfo;

    <span class="code-comment" style="color: #808080">// ....
</span>}
</pre> 
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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">
@Embeddable
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">class </span>PersonCityKey <span class="code-keyword" style="color: #000091">implements</span> Serializable {

    <span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">Long</span> personId;
    <span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">Long</span> cityId;


    <span class="code-keyword" style="color: #000091">public</span> PersonCityKey() {
    }

    <span class="code-comment" style="color: #808080">// ...
</span>}
</pre> 
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                                                        </div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">First I create a City and a Person and connect them via a PersonCity entity. Then I start a new transaction, load the created City using a LoadGraph and detach it immediatelly. That detach causes a PersistentObjectException when the transaction gets committed.</p> 
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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.RollbackException: Error <span class="code-keyword" style="color: #000091">while</span> committing the transaction

        at org.hibernate.internal.ExceptionConverterImpl.convertCommitException(ExceptionConverterImpl.java:75)
        at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:71)
        at org.hibernate.bugs.JPAUnitTestCase.causesPersistentObjectException(JPAUnitTestCase.java:92)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
        at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
        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.runners.ParentRunner.runLeaf(ParentRunner.java:271)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
        at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
        at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
        at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
        at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
        at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
        at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
        at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: detached entity passed to persist: org.hibernate.bugs.test.City
        at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:147)
        at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:155)
        at org.hibernate.internal.ExceptionConverterImpl.convertCommitException(ExceptionConverterImpl.java:56)
        ... 26 more
Caused by: org.hibernate.PersistentObjectException: detached entity passed to persist: org.hibernate.bugs.test.City
        at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:124)
        at org.hibernate.internal.SessionImpl.firePersistOnFlush(SessionImpl.java:840)
        at org.hibernate.internal.SessionImpl.persistOnFlush(SessionImpl.java:833)
        at org.hibernate.engine.spi.CascadingActions$8.cascade(CascadingActions.java:341)
        at org.hibernate.engine.internal.Cascade.cascadeToOne(Cascade.java:458)
        at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:383)
        at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:193)
        at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:126)
        at org.hibernate.event.internal.AbstractFlushingEventListener.cascadeOnFlush(AbstractFlushingEventListener.java:150)
        at org.hibernate.event.internal.AbstractFlushingEventListener.prepareEntityFlushes(AbstractFlushingEventListener.java:141)
        at org.hibernate.event.internal.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:74)
        at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:38)
        at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1435)
        at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:491)
        at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3201)
        at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2411)
        at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:467)
        at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:146)
        at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$100(JdbcResourceLocalTransactionCoordinatorImpl.java:38)
        at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:220)
        at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:68)
        ... 25 more
</pre> 
                                                            </div>
                                                        </div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">The exception doesn't get thrown when I comment out the call to EntityManager.detach. Debugging into the Hibernate code reveals, that Hibernate tries to persist the City entity which is referenced by the previously created (and already persisted) PersonCity object. It cascades a persist operation through <tt>PersonCity.city</tt> even though there is no cascade specified on the @ManyToOne reference. Moreover, I'm no sure if that persist is really required in that situation.</p> </td> 
                                                </tr> 
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    "url": "https://www.atlassian.com"
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                                <!-- there needs to be content in the cell for it to render in some clients --> 
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