NullPointerException in org.hibernate.type.EntityType.isEqual ------------------------------------------------------------- Key: HHH-6236 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6236 Project: Hibernate Core Issue Type: Bug Components: core Affects Versions: 3.6.4 Environment: Hibernate 3.6.4, MySQL 5.5.8, Linux x64 Reporter: Thomas Stinner The following error does not occur every time, but in 75% of all program starts. The error either occurs on one of the first queries to the database, or does not occur at all. We solve this issue by simply restarting the application and trying again. It also happens with other applications, not only this one. INFO | jvm 1 | 2011/05/19 10:43:19 | Caused by: java.lang.NullPointerException INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.type.EntityType.isEqual(EntityType.java:344) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.type.ComponentType.isEqual(ComponentType.java:176) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.engine.CollectionKey.equals(CollectionKey.java:71) INFO | jvm 1 | 2011/05/19 10:43:19 | at java.util.HashMap.put(HashMap.java:376) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.engine.StatefulPersistenceContext.addCollection(StatefulPersistenceContext.java:820) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.engine.StatefulPersistenceContext.addUninitializedCollection(StatefulPersistenceContext.java:789) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.type.CollectionType.getCollection(CollectionType.java:643) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.type.CollectionType.resolveKey(CollectionType.java:431) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.type.CollectionType.resolve(CollectionType.java:425) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:139) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:982) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.loader.Loader.doQuery(Loader.java:857) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:274) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.loader.Loader.loadEntity(Loader.java:2037) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:86) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:76) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3293) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:496) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:477) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:227) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:285) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:152) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:1090) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:1038) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:630) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.type.EntityType.resolve(EntityType.java:438) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:139) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:982) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.loader.Loader.doQuery(Loader.java:857) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:274) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.loader.Loader.doList(Loader.java:2533) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2276) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.loader.Loader.list(Loader.java:2271) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:452) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:363) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1268) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102) INFO | jvm 1 | 2011/05/19 10:43:19 | at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:246) INFO | jvm 1 | 2011/05/19 10:43:19 | at de.schuechen.tms.abrechnung.RechnungenErzeugen.ausRgVorschlag(RechnungenErzeugen.java:106) INFO | jvm 1 | 2011/05/19 10:43:19 | at de.schuechen.tms.abrechnung.RechnungenReporter.createJasperPrint(RechnungenReporter.java:136) INFO | jvm 1 | 2011/05/19 10:43:19 | ... 5 more STATUS | wrapper | 2011/05/19 10:43:22 | TERM trapped. 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