[Hibernate-JIRA] Created: (HHH-3527) Null Version Comparator for versioned class due to reuse of Second Level CacheDataDescriptionImpl
by Paul FitzPatrick (JIRA)
Null Version Comparator for versioned class due to reuse of Second Level CacheDataDescriptionImpl
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Key: HHH-3527
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3527
Project: Hibernate Core
Issue Type: Bug
Components: caching (L2)
Affects Versions: 3.3.1
Environment: 3.3.1 GA, Postgres 8.3.3, EH Cache
Reporter: Paul FitzPatrick
Priority: Minor
When the SessionFactoryImpl constructor builds the EntityPersister for classes, it consults a cache of entityAccessStrategies for all the known second level cache regions. If only some of the classes in that region have version tags, then it is possible the cached EntityRegionAccessStrategy will be created without a Version Comparator. Subsequent calls to load an object using a Criteria query failed with a NullPointerException (stack trace below). The line being executed is "return version!=null && comparator.compare(version, newVersion) < 0;" and in this case "version" is an Integer object and comparator is null.
Not sure the appropriate solution. It would seem from an examination of the code that if the EntityRegionAccessStrategy is to be shared, then all classes in the second level cache region _must_ either all have a "version" column or all have no "version" column. Further, it seems implied that if they use a "version" column, then they must all use the exact same data type. If this is the case, then a better error check on the configuration data may be in order.
Caused by: java.lang.NullPointerException
at org.hibernate.cache.ReadWriteCache$Item.isPuttable(ReadWriteCache.java:426)
at org.hibernate.cache.ReadWriteCache.put(ReadWriteCache.java:180)
at org.hibernate.cache.impl.bridge.EntityAccessStrategyAdapter.putFromLoad(EntityAccessStrategyAdapter.java:68)
at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:179)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:877)
at org.hibernate.loader.Loader.doQuery(Loader.java:752)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)
at org.hibernate.loader.Loader.doList(Loader.java:2228)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2125)
at org.hibernate.loader.Loader.list(Loader.java:2120)
at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:118)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1596)
at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:306)
at org.hibernate.impl.CriteriaImpl.uniqueResult(CriteriaImpl.java:328)
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14 years, 1 month
[Hibernate-JIRA] Created: (HHH-2097) LAZY property results in org.hibernate.TransientObjectException after merge
by Reto Urfer (JIRA)
LAZY property results in org.hibernate.TransientObjectException after merge
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Key: HHH-2097
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2097
Project: Hibernate3
Type: Bug
Components: core
Versions: 3.2.0.cr4
Environment: Hibernate3.2 cr4 with Annotations cr2 and EntityManager cr2, Oracle10g R2, WindowsXP
Reporter: Reto Urfer
Priority: Critical
Attachments: BugLazyPropertyMerge.zip
Entity1 has a property e2 which references Entity2. This property is defined as follows.
@ManyToOne(fetch = FetchType.LAZY, optional = false)
private Entity2 e2;
If you have an instance e1 of Entity1 which has not initialized property e2 and you merge e1 to the EntityManager within a transaction, then you get the following exception during commit:
Exception in thread "main" javax.persistence.RollbackException: Error while commiting the transaction
at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:63)
at com.test.Test.main(Test.java:42)
Caused by: org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.test.Entity1.e2 -> com.test.Entity2
at org.hibernate.engine.CascadingAction$9.noCascade(CascadingAction.java:350)
at org.hibernate.engine.Cascade.cascade(Cascade.java:139)
at org.hibernate.event.def.AbstractFlushingEventListener.cascadeOnFlush(AbstractFlushingEventListener.java:130)
at org.hibernate.event.def.AbstractFlushingEventListener.prepareEntityFlushes(AbstractFlushingEventListener.java:121)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:65)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:53)
... 1 more
I added a small Testproject to reproduce this bug.
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14 years, 2 months