[hibernate-issues] [Hibernate-JIRA] Resolved: (HHH-2326) NullPointerException from merge on composite id

NullPointerException from merge on composite id ----------------------------------------------- Key: HHH-2326 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2326 Project: Hibernate3 Issue Type: Bug Components: core Affects Versions: 3.2.1 Environment: Hibernate 3.2.1ga, tested against Oracle 10g and Derby Reporter: Greg Adams Assignee: Diego Pires Plentz Priority: Critical Attachments: HibernateMergeBug.zip Merge is throwing an NPE from the bowels of Hibernate when I have a class mapped with a composite ID. Stacktrace: [junit] java.lang.NullPointerException [junit] at org.hibernate.type.AbstractType.getHashCode(AbstractType.java:112) [junit] at org.hibernate.type.AbstractType.getHashCode(AbstractType.java:120) [junit] at org.hibernate.type.EntityType.getHashCode(EntityType.java:279) [junit] at org.hibernate.type.ComponentType.getHashCode(ComponentType.java:189) [junit] at org.hibernate.engine.EntityKey.generateHashCode(EntityKey.java:104) [junit] at org.hibernate.engine.EntityKey.<init>(EntityKey.java:48) [junit] at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:100) [junit] at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:687) [junit] at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:669) [junit] at org.hibernate.engine.CascadingAction$6.cascade(CascadingAction.java:245) [junit] at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:268) [junit] at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:216) [junit] at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169) [junit] at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:296) [junit] at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:242) [junit] at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:219) [junit] at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169) [junit] at org.hibernate.engine.Cascade.cascade(Cascade.java:130) [junit] at org.hibernate.event.def.AbstractSaveEventListener.cascadeAfterSave(AbstractSaveEventListener.java:437) [junit] at org.hibernate.event.def.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:194) [junit] at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:123) [junit] at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:53) [junit] at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:677) [junit] at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:661) [junit] at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:665) [junit] at com.foo.test.HibernateTest.doMerge(Unknown Source) [junit] at com.foo.test.HibernateTest.testInsert(Unknown Source) [junit] at org.junit.internal.runners.TestMethodRunner.executeMethodBody(TestMethodRunner.java:99) [junit] at org.junit.internal.runners.TestMethodRunner.runUnprotected(TestMethodRunner.java:81) [junit] at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34) [junit] at org.junit.internal.runners.TestMethodRunner.runMethod(TestMethodRunner.java:75) [junit] at org.junit.internal.runners.TestMethodRunner.run(TestMethodRunner.java:45) [junit] at org.junit.internal.runners.TestClassMethodsRunner.invokeTestMethod(TestClassMethodsRunner.java:71) [junit] at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35) [junit] at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42) [junit] at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34) [junit] at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52) [junit] at junit.framework.JUnit4TestAdapter.run(JUnit4TestAdapter.java:32) I've attached a zipped-up project that reproduces the error. Just extract and run ant.