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java.lang.NullPointerException: 	at oracle.jdbc.driver.AutoKeyInfo.initMetaDataColumnIndexes(AutoKeyInfo.java:423)	at oracle.jdbc.driver.AutoKeyInfo.initMetaData(AutoKeyInfo.java:396)	at oracle.jdbc.driver.OracleReturnResultSet.getMetaData(OracleReturnResultSet.java:77)	at org.hibernate.id.IdentifierGeneratorHelper.get(IdentifierGeneratorHelper.java:122)	at org.hibernate.id.IdentifierGeneratorHelper.getGeneratedIdentity(IdentifierGeneratorHelper.java:92)	at org.hibernate.id.SequenceIdentityGenerator$Delegate.executeAndExtract(SequenceIdentityGenerator.java:112)	at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:58)	at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2975)	at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3487)	at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:81)	at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:377)	at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:214)	at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:194)	at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:178)	at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:321)	at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:286)	at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:192)	at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:125)	at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:206)	at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:55)	at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:191)	at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:49)	at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)	at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:764)	at org.hibernate.internal.SessionImpl.save(SessionImpl.java:756)	at org.hibernate.internal.SessionImpl.save(SessionImpl.java:752)	at org.hibernate.test.generatedkeys.seqidentity.SequenceIdentityTest.testSequenceIdentityGenerator(SequenceIdentityTest.java:60)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)	at org.hibernate.testing.junit4.ExtendedFrameworkMethod.invokeExplosively(ExtendedFrameworkMethod.java:63)	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30)	at org.junit.internal.runners.statements.FailOnTimeout$StatementThread.run(FailOnTimeout.java:62)