merge() throws NPE or unable to create proxy
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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
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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