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From "gioni (JIRA)" <j...@apache.org>
Subject [jira] Commented: (OPENJPA-560) merge() throws NPE or unable to create proxy
Date Wed, 16 Jul 2008 13:17:31 GMT

    [ https://issues.apache.org/jira/browse/OPENJPA-560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12613949#action_12613949
] 

gioni commented on OPENJPA-560:
-------------------------------

I have encountered the some error with OpenJPA version 1.1.0, when i try to merge a detached
entity.
Environment: Swing app, openJPA 1.1.0, jdk1.6.0_06, Firebird 2.1, Windows 2000.

With OpenJPA version 1.0.2 and TopLink  works fine.

-----------
Exception in thread "AWT-EventQueue-0" java.lang.Error: java.lang.reflect.InvocationTargetException
        at org.jdesktop.application.ApplicationAction.actionFailed(ApplicationAction.java:859)
        at org.jdesktop.application.ApplicationAction.noProxyActionPerformed(ApplicationAction.java:665)
        at org.jdesktop.application.ApplicationAction.actionPerformed(ApplicationAction.java:698)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
        at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
        at java.awt.Component.processMouseEvent(Component.java:6041)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
        at java.awt.Component.processEvent(Component.java:5806)
        at java.awt.Container.processEvent(Container.java:2058)
        at java.awt.Component.dispatchEventImpl(Component.java:4413)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Component.dispatchEvent(Component.java:4243)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
        at java.awt.Container.dispatchEventImpl(Container.java:2102)
        at java.awt.Window.dispatchEventImpl(Window.java:2440)
        at java.awt.Component.dispatchEvent(Component.java:4243)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
Caused by: java.lang.reflect.InvocationTargetException
        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 org.jdesktop.application.ApplicationAction.noProxyActionPerformed(ApplicationAction.java:662)
        ... 27 more
Caused by: <openjpa-1.1.0-r422266:657916 nonfatal general error> org.apache.openjpa.persistence.PersistenceException:
null
        at org.apache.openjpa.kernel.BrokerImpl.attach(BrokerImpl.java:3213)
        at org.apache.openjpa.kernel.DelegatingBroker.attach(DelegatingBroker.java:1158)
        at org.apache.openjpa.persistence.EntityManagerImpl.merge(EntityManagerImpl.java:769)
        at ro.mig.InvoiceView.saveInvoice(InvoiceView.java:597)
        at ro.mig.InvoiceView.save(InvoiceView.java:621)
        ... 32 more
Caused by: java.lang.NullPointerException
        at org.apache.openjpa.kernel.StateManagerImpl.replaceObjectField(StateManagerImpl.java:2056)
        at org.apache.openjpa.enhance.ro$mig$entity$InvoiceHeader$pcsubclass.pcReplaceField(Unknown
Source)
        at org.apache.openjpa.kernel.StateManagerImpl.replaceField(StateManagerImpl.java:3015)
        at org.apache.openjpa.kernel.StateManagerImpl.storeObjectField(StateManagerImpl.java:2453)
        at org.apache.openjpa.kernel.StateManagerImpl.storeObject(StateManagerImpl.java:2443)
        at org.apache.openjpa.jdbc.meta.strats.StoreCollectionFieldStrategy.load(StoreCollectionFieldStrategy.java:493)
        at org.apache.openjpa.jdbc.meta.FieldMapping.load(FieldMapping.java:802)
        at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.load(JDBCStoreManager.java:520)
        at org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
        at org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78)
        at org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:2911)
        at org.apache.openjpa.kernel.StateManagerImpl.loadField(StateManagerImpl.java:2989)
        at org.apache.openjpa.kernel.StateManagerImpl.fetchObjectField(StateManagerImpl.java:2238)
        at org.apache.openjpa.kernel.StateManagerImpl.fetchField(StateManagerImpl.java:775)
        at org.apache.openjpa.kernel.StateManagerImpl.fetch(StateManagerImpl.java:737)
        at org.apache.openjpa.enhance.RedefinitionHelper$1.invoke(RedefinitionHelper.java:230)
        at $Proxy14.isEmpty(Unknown Source)
        at org.apache.openjpa.kernel.AttachStrategy.attachField(AttachStrategy.java:213)
        at org.apache.openjpa.kernel.VersionAttachStrategy.attach(VersionAttachStrategy.java:161)
        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:3206)
        ... 36 more

-----------


> merge() throws NPE or unable to create proxy
> --------------------------------------------
>
>                 Key: OPENJPA-560
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-560
>             Project: OpenJPA
>          Issue Type: Bug
>    Affects Versions: 1.1.0
>         Environment: Linux 2.6, Java 1.5.0_12, Derby 10.3.2.1
>            Reporter: Adam Hardy
>         Attachments: bug-jpa-merge.zip
>
>
> I have reduced this to a stand-alone unit test and also tested it against Toplink and
Hibernate, with which it works.
> So I'm looking at a pure OpenJPA issue here.
> Here is the low-down:
> - Parent - child entities mapped using XML as opposed to annotations
> - both inherit a mapped superclass
> - both have a prepersist and preupdate listener configured
> - not using enhancement
> This is all I do:
> EntityManager entityManager =
>     db.entityManagerFactory.createEntityManager();
> entityManager.getTransaction().begin();
> Genus genus = entityManager.find(Genus.class, new Long(1));
> entityManager.getTransaction().commit();
> entityManager.close();
> // now detached
> entityManager = db.entityManagerFactory.createEntityManager();
> entityManager.getTransaction().begin();
> entityManager.merge(genus);
> and it throws an exception. If there is a child row in the db, I get the exception below.
> If there is no child in existence, I get a NullPointerException.
> If I enhance the entities, all is hunkydory.
> This is using OpenJPA v1.1.0 snapshot from February. 
>  $Proxy13 seems to be the name of the parent's child collection property, I can see from
debugging.
>  <openjpa-1.1.0-SNAPSHOT-r420667:609825 fatal general error> org.apache.openjpa.persistence.PersistenceException:
Unable to create a second class object proxy for final class "class $Proxy13".
>      at org.apache.openjpa.util.ProxyManagerImpl.assertNotFinal(ProxyManagerImpl.java:555)
>      at org.apache.openjpa.util.ProxyManagerImpl.generateProxyCollectionBytecode(ProxyManagerImpl.java:524)
>      at org.apache.openjpa.util.ProxyManagerImpl.getFactoryProxyCollection(ProxyManagerImpl.java:373)
>      at org.apache.openjpa.util.ProxyManagerImpl.copyCollection(ProxyManagerImpl.java:192)
>      at org.apache.openjpa.kernel.AttachStrategy.copyCollection(AttachStrategy.java:342)
>      at org.apache.openjpa.kernel.AttachStrategy.attachCollection(AttachStrategy.java:319)
>      at org.apache.openjpa.kernel.AttachStrategy.replaceList(AttachStrategy.java:357)
>      at org.apache.openjpa.kernel.AttachStrategy.attachField(AttachStrategy.java:222)
>      at org.apache.openjpa.kernel.VersionAttachStrategy.attach(VersionAttachStrategy.java:151)
>      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:3196)
>      at org.apache.openjpa.kernel.DelegatingBroker.attach(DelegatingBroker.java:1142)
>      at org.apache.openjpa.persistence.EntityManagerImpl.merge(EntityManagerImpl.java:736)
>      at org.permacode.atomictest.jpa.JpaSpeciesDao.persist(JpaSpeciesDao.java:81)

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