Cannot initialize EntityManager ExceptionInInitializerError

ethnarch · **Joined:** Tue Aug 01, 2006 9:24 pm **Posts:** 120

I am using hibernate in netbeans with ejb3 and i had all of this working but i added another persistence unit to the persistence.xml and everything seems to have stopped working now i keep getting the error below.

I tried to go back to the simpler persistence.xml even deleting it entirely and rebuilding it but i get the same error
Hibernate version:3.2.2.ga

Mapping documents:

it fails on this line of code before i even begin to start a session:
private static EntityManagerFactory emf = Persistence.createEntityManagerFactory("Booth_StatPU");:

Exception in thread "AWT-EventQueue-0" java.lang.ExceptionInInitializerError
at ftpImporter.downloaderGui.<init>(downloaderGui.java:24)
at ftpImporter.testFrame.<init>(testFrame.java:18)
at ftpImporter.testFrame$1.run(testFrame.java:49)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
Caused by: javax.persistence.PersistenceException: java.lang.NullPointerException
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:252)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:120)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:51)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:33)
at ftpImporter.DataImporter.<clinit>(DataImporter.java:34)
... 10 more
Caused by: java.lang.NullPointerException
at org.hibernate.cfg.OneToOneSecondPass.doSecondPass(OneToOneSecondPass.java:135)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1130)
at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:296)
at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1115)
at org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:1233)
at org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:154)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:869)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:183)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:240)
... 14 more
java.lang.IllegalThreadStateException
at java.lang.ThreadGroup.add(ThreadGroup.java:856)
at java.lang.Thread.start(Thread.java:573)
at org.apache.tools.ant.taskdefs.ProcessDestroyer.removeShutdownHook(ProcessDestroyer.java:145)
at org.apache.tools.ant.taskdefs.ProcessDestroyer.remove(ProcessDestroyer.java:198)
at org.apache.tools.ant.taskdefs.Execute.execute(Execute.java:490)
at org.apache.tools.ant.taskdefs.Java.fork(Java.java:751)
at org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:171)
at org.apache.tools.ant.taskdefs.Java.execute(Java.java:84)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
at org.apache.tools.ant.Task.perform(Task.java:364)
at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:64)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
at org.apache.tools.ant.Task.perform(Task.java:364)
at org.apache.tools.ant.taskdefs.MacroInstance.execute(MacroInstance.java:378)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
at org.apache.tools.ant.Task.perform(Task.java:364)
at org.apache.tools.ant.Target.execute(Target.java:341)
at org.apache.tools.ant.Target.performTasks(Target.java:369)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1216)
at org.apache.tools.ant.Project.executeTarget(Project.java:1185)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:40)
at org.apache.tools.ant.Project.executeTargets(Project.java:1068)
at org.apache.tools.ant.module.bridge.impl.BridgeImpl.run(BridgeImpl.java:240)
at org.apache.tools.ant.module.run.TargetExecutor.run(TargetExecutor.java:293)
at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:131)
debug-single:
BUILD SUCCESSFUL (total time: 1 minute 44 seconds)

Database: FirebirdSQL 1.5

ethnarch · **Joined:** Tue Aug 01, 2006 9:24 pm **Posts:** 120

i rebuilt my entire project again re-importing package by package to narrow down the problem after finding that the part of the application i was trying to run would run outside of my project.

I found it was an unrelated error in another part of the application that had nothing to do with my ftpImporter package. It's kinda of strange because even though ftpImporter does not initialize the class CollectionCC anywhere at anytime even indirectly an error on this line in CollectionCC which references a non-existent persistance unit:

Code:

 private static EntityManagerFactory emf = Persistence.createEntityManagerFactory("CollectionEntryPU");

if i change it to an existing persistance unit

Code:

 private static EntityManagerFactory emf = Persistence.createEntityManagerFactory("Collection_ReporterPU");

now it works but why would this be even though like i said nothing ever initializes CollectionCC. Well i should say what is initializing it?

Does anybody know why?[/code]

emmanuel · **Posted:** Tue Feb 27, 2007 7:25 pm

There are 2 bugs related to OneToOne and NPE that I fixed in SVN, you probably reached one.