Re: [eclipselink-users] EclipseLink 2.2 is calling size() on LAZY fetche

[Tom Ware <tom.ware@xxxxxxxxxx>]

Hi Patric,

  What does your query look like?  What do your mappings look like?

  The code that would instantiate the object runs in a couple of cases.

1. some cases where the query is doing a refresh and the relationship was 
already populated in the persistence context
2. The object is joined or fetch joined in the query
3. Some pessimistic-locking related cases

-Tom

Patric Rufflar wrote:
> Hi,
>
> I encountered a situation which I cannot explain.
> Maybe somebody can help me out.
>
> I'm trying to fetch an entity of class A via Query, which has a 
> ManyToOne mapping to an entity
> of class B which has a OneToMany mapping (using an IndirectSet) to 
> entities of class C.
>
> I am not providing a FetchType, so I expect the default LAZY.
> Weaving is not used.
>
> As you can see in the stacktrace below (line marked with >>>), 
> EclipseLink calls size() on the
> IndirectSet which causes that the actual entities of the indirection 
> collection will be fetched,
> which of course is not desired. (in my case there are 10000 of entities 
> in that Set which have
> additional references to other entities which causes my application to 
> stop working)
>
> In EclipseLink 2.1 and 1.1.x I cannot see this behavior.
>
> My question:
> - Is this an expected behavior?
> - If so: How can I force EclipseLink to not call size() on the IndirectSet?
>
> Thank you and best regards,
> Patric
>
> Here's the important part of the stackstrace:
> ...
> RepeatableWriteUnitOfWork(UnitOfWorkImpl).getCommitManager() line: 1854
> UnitOfWorkQueryValueHolder(UnitOfWorkValueHolder).instantiateImpl() 
> line: 152
> UnitOfWorkQueryValueHolder(UnitOfWorkValueHolder).instantiate() line: 222
> UnitOfWorkQueryValueHolder(DatabaseValueHolder).getValue() line: 88
> IndirectSet.buildDelegate() line: 192
> IndirectSet.getDelegate() line: 343
> > > > IndirectSet.size() line: 500
> CollectionContainerPolicy.sizeFor(Object) line: 177
> TransparentIndirectionPolicy.instantiateObject(Object, Object) line: 369
> OneToManyMapping(ForeignReferenceMapping).buildCloneFromRow(AbstractRecord, 
> JoinedAttributeManager, Object, CacheKey, ObjectBuildingQuery, 
> UnitOfWorkImpl, AbstractSession) line: 280
> ObjectBuilder.buildAttributesIntoWorkingCopyClone(Object, CacheKey, 
> ObjectBuildingQuery, JoinedAttributeManager, AbstractRecord, 
> UnitOfWorkImpl, boolean) line: 1415
> ObjectBuilder.buildWorkingCopyCloneFromRow(ObjectBuildingQuery, 
> JoinedAttributeManager, AbstractRecord, UnitOfWorkImpl, Object) line: 1561
> ObjectBuilder.buildObjectInUnitOfWork(ObjectBuildingQuery, 
> JoinedAttributeManager, AbstractRecord, UnitOfWorkImpl, Object, 
> ClassDescriptor) line: 561
> ObjectBuilder.buildObject(ObjectBuildingQuery, AbstractRecord, 
> JoinedAttributeManager) line: 497
> ObjectBuilder.buildObject(ObjectLevelReadQuery, AbstractRecord) line: 456
> ReadObjectQuery(ObjectLevelReadQuery).buildObject(AbstractRecord) line: 723
> ReadObjectQuery.registerResultInUnitOfWork(Object, UnitOfWorkImpl, 
> AbstractRecord, boolean) line: 766
> ReadObjectQuery.executeObjectLevelReadQuery() line: 451
> ReadObjectQuery(ObjectLevelReadQuery).executeDatabaseQuery() line: 1080
> ReadObjectQuery(DatabaseQuery).execute(AbstractSession, AbstractRecord) 
> line: 808
> ReadObjectQuery(ObjectLevelReadQuery).execute(AbstractSession, 
> AbstractRecord) line: 1040
> ReadObjectQuery.execute(AbstractSession, AbstractRecord) line: 412
> ReadObjectQuery(ObjectLevelReadQuery).executeInUnitOfWork(UnitOfWorkImpl, 
> AbstractRecord) line: 1126
> RepeatableWriteUnitOfWork(UnitOfWorkImpl).internalExecuteQuery(DatabaseQuery, 
> AbstractRecord) line: 2842
> RepeatableWriteUnitOfWork(AbstractSession).executeQuery(DatabaseQuery, 
> AbstractRecord, int) line: 1521
> RepeatableWriteUnitOfWork(AbstractSession).executeQuery(DatabaseQuery, 
> AbstractRecord) line: 1503
> NoIndirectionPolicy.valueFromQuery(ReadQuery, AbstractRecord, 
> AbstractSession) line: 323
> ManyToOneMapping(ForeignReferenceMapping).valueFromRowInternal(AbstractRecord, 
> JoinedAttributeManager, ObjectBuildingQuery, AbstractSession) line: 2061
> ManyToOneMapping(OneToOneMapping).valueFromRowInternal(AbstractRecord, 
> JoinedAttributeManager, ObjectBuildingQuery, AbstractSession) line: 1635
> ManyToOneMapping(ForeignReferenceMapping).valueFromRow(AbstractRecord, 
> JoinedAttributeManager, ObjectBuildingQuery, CacheKey, AbstractSession, 
> boolean) line: 1950
> ManyToOneMapping(ForeignReferenceMapping).buildCloneFromRow(AbstractRecord, 
> JoinedAttributeManager, Object, CacheKey, ObjectBuildingQuery, 
> UnitOfWorkImpl, AbstractSession) line: 274
> ObjectBuilder.buildAttributesIntoWorkingCopyClone(Object, CacheKey, 
> ObjectBuildingQuery, JoinedAttributeManager, AbstractRecord, 
> UnitOfWorkImpl, boolean) line: 1415
> ObjectBuilder.buildWorkingCopyCloneFromRow(ObjectBuildingQuery, 
> JoinedAttributeManager, AbstractRecord, UnitOfWorkImpl, Object) line: 1561
> ObjectBuilder.buildObjectInUnitOfWork(ObjectBuildingQuery, 
> JoinedAttributeManager, AbstractRecord, UnitOfWorkImpl, Object, 
> ClassDescriptor) line: 561
> ObjectBuilder.buildObject(ObjectBuildingQuery, AbstractRecord, 
> JoinedAttributeManager) line: 497
> ObjectBuilder.buildObject(ObjectLevelReadQuery, AbstractRecord) line: 456
> ReadAllQuery(ObjectLevelReadQuery).buildObject(AbstractRecord) line: 723
> ReadAllQuery.registerResultInUnitOfWork(Object, UnitOfWorkImpl, 
> AbstractRecord, boolean) line: 742
> ReadAllQuery.executeObjectLevelReadQuery() line: 423
> ReadAllQuery(ObjectLevelReadQuery).executeDatabaseQuery() line: 1080
> ReadAllQuery(DatabaseQuery).execute(AbstractSession, AbstractRecord) 
> line: 808
> ReadAllQuery(ObjectLevelReadQuery).execute(AbstractSession, 
> AbstractRecord) line: 1040
> ReadAllQuery.execute(AbstractSession, AbstractRecord) line: 383
> ReadAllQuery(ObjectLevelReadQuery).executeInUnitOfWork(UnitOfWorkImpl, 
> AbstractRecord) line: 1126
> RepeatableWriteUnitOfWork(UnitOfWorkImpl).internalExecuteQuery(DatabaseQuery, 
> AbstractRecord) line: 2842
> RepeatableWriteUnitOfWork(AbstractSession).executeQuery(DatabaseQuery, 
> AbstractRecord, int) line: 1521
> RepeatableWriteUnitOfWork(AbstractSession).executeQuery(DatabaseQuery, 
> AbstractRecord) line: 1503
> RepeatableWriteUnitOfWork(AbstractSession).executeQuery(DatabaseQuery, 
> List) line: 1477
> EJBQueryImpl<X>.executeReadQuery() line: 484
> EJBQueryImpl<X>.getSingleResult() line: 772
> ... (my application calls getSingleResult())
>
>
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