[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-6960) NullPointerException in PreCollectionRemove Listener
[
https://hibernate.onjira.com/browse/HHH-6960?page=com.atlassian.jira.plug...
]
Leon Pennings commented on HHH-6960:
------------------------------------
I'm added this implementation to our own code as a temporary workaround:
public class EnversPreCollectionRemoveEventListenerImpl
extends BaseEnversCollectionEventListener
implements PreCollectionRemoveEventListener {
protected EnversPreCollectionRemoveEventListenerImpl(AuditConfiguration
enversConfiguration) {
super( enversConfiguration );
}
@Override
public void onPreRemoveCollection(PreCollectionRemoveEvent event) {
CollectionEntry collectionEntry = getCollectionEntry( event );
if ( collectionEntry != null && collectionEntry.getLoadedPersister() !=
null && !collectionEntry.getLoadedPersister().isInverse() ) {
onCollectionAction( event, null, collectionEntry.getSnapshot(),
collectionEntry );
}
}
}
Since the nullpointer is occurring on a collectionEntry that is not present in my entity
(i.e. it is triggered on a fourth collection where only three collections are present)
this workaround is acceptable for now.
Needless to say, the fourth 'phantom' event should never have been fired.
Maybe this is fired by a proxy on the collection?
NullPointerException in PreCollectionRemove Listener
----------------------------------------------------
Key: HHH-6960
URL: https://hibernate.onjira.com/browse/HHH-6960
Project: Hibernate ORM
Issue Type: Bug
Components: envers
Affects Versions: 4.0.0.Final
Environment: Hibernate 4.0.0 to MySQL
Reporter: Kevin Jordan
Assignee: Gail Badner
Attachments: hibernateBugProofWithSchema.zip, hibernateBugProof.zip
I'm getting a NullPointerException on line 47 of
EnversPreCollectionRemoveEventListenerImpl very consistently. I wasn't sure if it was
due to lazy collections or not, but it seems that it fails if they're eagerly fetched
or lazily fetched. I'm guessing it has something to do with getLoadedPersister()
returning a null value since the comments for it say "This is only available late
during the flush cycle". The stack trace is
Quote:
java.lang.NullPointerException
at
org.hibernate.envers.event.EnversPreCollectionRemoveEventListenerImpl.onPreRemoveCollection(EnversPreCollectionRemoveEventListenerImpl.java:47)
at
org.hibernate.action.internal.CollectionRemoveAction.preRemove(CollectionRemoveAction.java:143)
at
org.hibernate.action.internal.CollectionRemoveAction.execute(CollectionRemoveAction.java:104)
at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:273)
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:265)
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:188)
at
org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:323)
at
org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:52)
at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1081)
at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:315)
at
org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit(JdbcTransaction.java:101)
at
org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:175)
at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:73)
... 120 more
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira