[ https://issues.apache.org/jira/browse/OPENJPA-585?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Patrick Linskey resolved OPENJPA-585.
-------------------------------------

    Resolution: Fixed

> Got EntityExistsException when invoking EntityManager.merge() to persist a new entity bean with generated id  and enhanced at deployment time 
> ----------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: OPENJPA-585
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-585
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: kernel
>    Affects Versions: 1.1.0
>            Reporter: Jason Zheng
>             Fix For: 1.1.0
>
>         Attachments: patch-585.txt
>
>
> I create a new entity object with generated id, enhance it at deployment time and persist it into db by invoking EntityManager.merge().
> Department d = new Department();
> d.setName('qa');
> pc.merge(d);
> Got below exception,
> <openjpa-1.1.0-SNAPSHOT-r422266:647033 nonfatal store error> org.apache.openjpa.persistence.EntityExistsException: Attempt to persist detached object 'org.apache.openjpa.enhance.tests$functional$jee$misc$classredefinition$common$apps$appforredefinition$entity$Department$pcsubclass@acb905'. If this is a new instance, make sure any versino and/or auto-generated primary key fields are null/default when persisting.
> FailedObject: 
> org.apache.openjpa.enhance.tests$functional$jee$misc$classredefinition$common$apps$appforredefinition$entity$Department$pcsubclass@acb905
> at org.apache.openjpa.kernel.BrokerImpl.persist(BrokerImpl.java:2403)
> at org.apache.openjpa.kernel.AttachStrategy.persist(AttachStrategy.java:94)
> at org.apache.openjpa.kernel.VersionAttachStrategy.attach(VersionAttachStrategy.java:95)
> at org.apache.openjpa.kernel.AttachManager.attach(AttachManager.java:241)
> at org.apache.openjpa.kernel.AttachManager.attach(AttachManager.java:101)
> at org.apache.openjpa.kernel.BrokerImpl.attach(BrokerImpl.java:3191)
> at kodo.kernel.KodoBroker.attach(KodoBroker.java:251)
> at org.apache.openjpa.kernel.DelegatingBroker.attach(DelegatingBroker.java:1142)
> at org.apache.openjpa.persistence.EntityManagerImpl.merge(EntityManagerImpl.java:740)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at weblogic.deployment.BasePersistenceContextProxyImpl.invoke(BasePersistenceContextProxyImpl.java:90)
> ...
> This is caused by a bug in VersionAttachStrategy, which creates appId and passes it to persist() call for a new entity whose id is annotated with @GeneratedValue.
> Jason

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