[hibernate-issues] [Hibernate-JIRA] Issue Comment Edited: (HHH-5599) NPE occurs when using Infinispan as L2 Cache

NPE occurs when using Infinispan as L2 Cache -------------------------------------------- Key: HHH-5599 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5599 Project: Hibernate Core Issue Type: Bug Components: caching (L2) Affects Versions: 3.5.5, 3.5.6 Environment: Hib 3.5.6 Infinispan 4.2.0.ALPHA2 (same thing happen with Hib 3.5.5 and IS 4.1.0.FINAL) Reporter: Chris Assignee: Galder Zamarreno Priority: Critical Fix For: 3.6.1, 3.x, 4.0.0.Alpha1 Pretty much randomly or so it seems, infinispan hibernate layer will throw a NPE. It occurs a lot when the j2EE server is started and overtime (once caches are warmer?) diminish. The issue comes from the PutFromLoadValidator.Java(565).The cleaned element is null and the map.put(cleaned) fails since the key is coming from the cleaned element (cleaned.owner). Complete stacktraces, the first on entity loading and the later on collection loading: Cause: java.lang.NullPointerException at org.hibernate.cache.infinispan.access.PutFromLoadValidator$PendingPut.access$700(PutFromLoadValidator.java:674) at org.hibernate.cache.infinispan.access.PutFromLoadValidator$PendingPutMap.put(PutFromLoadValidator.java:627) at org.hibernate.cache.infinispan.access.PutFromLoadValidator.cleanOutdatedPendingPuts(PutFromLoadValidator.java:565) at org.hibernate.cache.infinispan.access.PutFromLoadValidator.preventOutdatedPendingPuts(PutFromLoadValidator.java:493) at org.hibernate.cache.infinispan.access.PutFromLoadValidator.registerPendingPut(PutFromLoadValidator.java:438) at org.hibernate.cache.infinispan.access.TransactionalAccessDelegate.get(TransactionalAccessDelegate.java:66) at org.hibernate.cache.infinispan.entity.TransactionalAccess.get(TransactionalAccess.java:36) at org.hibernate.engine.BatchFetchQueue.isCached(BatchFetchQueue.java:278) at org.hibernate.engine.BatchFetchQueue.getEntityBatch(BatchFetchQueue.java:253) at org.hibernate.loader.entity.BatchingEntityLoader.load(BatchingEntityLoader.java:90) at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3270) at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:496) at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:477) at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:227) at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:285) at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:152) at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:1080) at org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:1028) at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:623) at org.hibernate.type.EntityType.resolve(EntityType.java:431) at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:140) at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:898) at org.hibernate.loader.Loader.doQuery(Loader.java:773) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:270) at org.hibernate.loader.Loader.loadEntityBatch(Loader.java:2047) at org.hibernate.loader.entity.BatchingEntityLoader.load(BatchingEntityLoader.java:99) at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3270) at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:496) at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:477) at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:227) at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:285) at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:152) at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:1080) at org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:1028) at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:623) at org.hibernate.type.EntityType.resolve(EntityType.java:431) at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:140) at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:898) at org.hibernate.loader.Loader.doQuery(Loader.java:773) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:270) at org.hibernate.loader.Loader.doList(Loader.java:2449) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2192) at org.hibernate.loader.Loader.list(Loader.java:2187) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:452) at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:363) at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1258) at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102) Cause: java.lang.NullPointerException at org.hibernate.cache.infinispan.access.PutFromLoadValidator$PendingPut.access$700(PutFromLoadValidator.java:674) at org.hibernate.cache.infinispan.access.PutFromLoadValidator$PendingPutMap.put(PutFromLoadValidator.java:627) at org.hibernate.cache.infinispan.access.PutFromLoadValidator.cleanOutdatedPendingPuts(PutFromLoadValidator.java:565) at org.hibernate.cache.infinispan.access.PutFromLoadValidator.preventOutdatedPendingPuts(PutFromLoadValidator.java:493) at org.hibernate.cache.infinispan.access.PutFromLoadValidator.registerPendingPut(PutFromLoadValidator.java:438) at org.hibernate.cache.infinispan.access.TransactionalAccessDelegate.get(TransactionalAccessDelegate.java:66) at org.hibernate.cache.infinispan.collection.TransactionalAccess.get(TransactionalAccess.java:36) at org.hibernate.engine.BatchFetchQueue.isCached(BatchFetchQueue.java:295) at org.hibernate.engine.BatchFetchQueue.getCollectionBatch(BatchFetchQueue.java:203) at org.hibernate.loader.collection.BatchingCollectionInitializer.initialize(BatchingCollectionInitializer.java:73) at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:628) at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:83) at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1853) at org.hibernate.collection.AbstractPersistentCollection.forceInitialization(AbstractPersistentCollection.java:479) at org.hibernate.engine.StatefulPersistenceContext.initializeNonLazyCollections(StatefulPersistenceContext.java:899) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:275) at org.hibernate.loader.Loader.doList(Loader.java:2449) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2192) at org.hibernate.loader.Loader.list(Loader.java:2187) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:452) at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:363) at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1258) at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102) For now I am masking this class with my own which essentially is a copy and paste but added a null check before trying to put back the element. How the big question is : Is it normal that the element can be null and it's a simple null check that has been forgotten or the element should never be null and something bigger is going on ?