[hibernate-issues] [Hibernate-JIRA] Resolved: (HHH-3847) java.lang.NullPointerException on onPreRemoveCollection on replicate of persistent class

java.lang.NullPointerException on onPreRemoveCollection on replicate of persistent class ---------------------------------------------------------------------------------------- Key: HHH-3847 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3847 Project: Hibernate Core Issue Type: Bug Components: envers Affects Versions: 3.3.1 Environment: Envers 1.2, Hibernate 3.3.1 on Mysql and Hsql. Reporter: Francesco Di Salvatore Assignee: Adam Warski Priority: Critical Fix For: 3.5 Attachments: HHH-3847patch.txt, TestEnvers12.zip I get this exception when trying to REPLICATE an object in a synchronized database: Code: DEBUG [main] (CodeSystemDAOHibernate.java:131) - java.lang.NullPointerException at org.hibernate.envers.event.AuditEventListener.onPreRemoveCollection(AuditEventListener.java:235) at org.hibernate.action.CollectionRemoveAction.preRemove(CollectionRemoveAction.java:134) at org.hibernate.action.CollectionRemoveAction.execute(CollectionRemoveAction.java:100) at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:263) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:169) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventLis tener.java:321) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1027) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:365) at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:137) at com.phi.dictionarymanager.logic.hibernate.GenericDAOHibaernate.commitNetwork(GenericDAOHibaernate .java:183) at com.phi.dictionarymanager.logic.hibernate.CodeSystemDAOHibernate.save(CodeSystemDAOHibernate.jav a:92) at com.phi.dictionarymanager.ui.widgets.VocabolaryItemNewComposite.save(VocabolaryItemNewComposite. java:515) at com.phi.dictionarymanager.ui.widgets.VocabularyDomainsNavigatorComposite$18.handleEvent(Vocabula ryDomainsNavigatorComposite.java:1434) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3682) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3293) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219) at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:169) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.j ava:106) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:508) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:447) at org.eclipse.equinox.launcher.Main.run(Main.java:1173) at org.eclipse.equinox.launcher.Main.main(Main.java:1148) Code throwing the exception: Code: beginTransactionLocal(); makePersistentLocal(cs); commitLocal(); closeSessionLocal(); beginTransactionNetwork(); makePersistentNetwork(cs); commitNetwork(); closeSessionNetwork(); For this insertion of the object cs, the makePersistentLocal makes a saveOrUpdate call, while makePersistentNetwork calls replicate(cs, ReplicateMode.LATEST_VERSION). My hibernate-mysql.cfg.xml and hibernate-hsql.cfg.xml are very similar (I post only the mysql one): Code: <hibernate-configuration> <session-factory> ... <property name="org.hibernate.envers.revisionOnCollectionChange">true</property> <property name="org.hibernate.envers.doNotAuditOptimisticLockingField">true</property> <!-- HIBERNATE BEAN MAPPINGS --> <mapping resource="com/phi/dictionarymanager/beans/CodeEquivalent.hbm.xml" /> <mapping resource="com/phi/dictionarymanager/beans/CodeValue.hbm.xml" /> <mapping resource="com/phi/dictionarymanager/beans/CodeTranslation.hbm.xml" /> <mapping resource="com/phi/dictionarymanager/beans/CodeSystem.hbm.xml" /> <event type="post-insert"> <listener class="org.hibernate.envers.event.AuditEventListener" /> </event> <event type="post-update"> <listener class="org.hibernate.envers.event.AuditEventListener" /> </event> <event type="post-delete"> <listener class="org.hibernate.envers.event.AuditEventListener" /> </event> <event type="pre-collection-update"> <listener class="org.hibernate.envers.event.AuditEventListener" /> </event> <event type="pre-collection-remove"> <listener class="org.hibernate.envers.event.AuditEventListener" /> </event> <event type="post-collection-recreate"> <listener class="org.hibernate.envers.event.AuditEventListener" /> </event> </session-factory> </hibernate-configuration> All the collections in this project are in mode lazy="true". In the first saving the onPreRemoveCollection method is never called.