[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-6960) NullPointerException in PreCollectionRemove Listener

[ https://hibernate.onjira.com/browse/HHH-6960?page=com.atlassian.jira.plug... ] Stefan Hildebrandt commented on HHH-6960: ----------------------------------------- Some debugging: collectionEntry lockes like this: collectionEntry = org.hibernate.engine.spi.CollectionEntry@7952 snapshot = null role = null loadedPersister = null loadedKey = null reached = false processed = true doupdate = false doremove = true docreate = false ignore = false currentPersister = null currentKey = null Looks like a remove event. Possible there was a remove event within a prior flush, thats removed the entity. Code that checks this: {code} private static final IdentityHashMap<PersistentCollection, CollectionEntry> identityHashMap = new IdentityHashMap<PersistentCollection, CollectionEntry>(); @Override public void onPreRemoveCollection(PreCollectionRemoveEvent event) { CollectionEntry collectionEntry = getCollectionEntry( event ); if ( collectionEntry != null && !(collectionEntry.isDoremove() &&identityHashMap.containsKey(event.getCollection())) && !collectionEntry.getLoadedPersister().isInverse() ) { onCollectionAction( event, null, collectionEntry.getSnapshot(), collectionEntry ); } if(collectionEntry.isDoremove()){ identityHashMap.put(event.getCollection(), collectionEntry); } } {code} All Tests are running! After that, the following code seams to be save. {code} @Override public void onPreRemoveCollection(PreCollectionRemoveEvent event) { CollectionEntry collectionEntry = getCollectionEntry( event ); if ( collectionEntry != null && !(collectionEntry.getCurrentPersister() == null && collectionEntry.isDoremove() && collectionEntry.isProcessed()) && !collectionEntry.getLoadedPersister().isInverse() ) { onCollectionAction( event, null, collectionEntry.getSnapshot(), collectionEntry ); } if(collectionEntry.isDoremove()){ identityHashMap.put(event.getCollection(), collectionEntry); } } {code} -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira