当我尝试以下列方式访问我的集合（List）时，即使我在同一个UserTransaction中执行此操作，也会出现以下错误。
:::
EntityAccessorException: org.hibernate.exception.DataException: could not initialize a collection
:::
Caused by: org.hibernate.exception.DataException: could not initialize a collection:
:::
List<Brand> brands = fullTextQuery.getResultList();
for (Brand b : brands) {
Iterator<BrandPromoDetails> i2 = b.getBrandPromoDetails()
.iterator();
while (i2.hasNext()) {
BrandPromoDetails bpd = i2.next();
====================================================================================
然而，当我将其更改为如下时，它可以工作。我的数据库是Derby，我使用Hibernate作为JPA提供程序并使用Hibernate Search。如果有人能提供这种行为的解释，那就太好了。
List<Brand> brands = fullTextQuery.getResultList();
for (Brand b : brands) {
@SuppressWarnings("unchecked")
List<BrandPromoDetails> i2 = em.createQuery("select x from BrandPromoDetails as x where BPDBRAND_ID = ?1")
.setParameter(1, b.getId())
.getResultList();
for (BrandPromoDetails bpd : i2) {
这里是..
[#|2011-02-23T22:34:04.711+0530|INFO|glassfish3.0.1|javax.enterprise.system.std.com.sun.enterprise.v3.services.impl|_ThreadID=91;_ThreadName=Thread-1;|Hibernate: select brandpromo0_.bpdBrand_id as bpdBrand10_11_1_, brandpromo0_.id as id1_, brandpromo0_.bpdCreationDate as bpdCreat2_1_, brandpromo0_.id as id16_0_, brandpromo0_.bpdBrand_id as bpdBrand10_16_0_, brandpromo0_.bpdCreationDate as bpdCreat2_16_0_, brandpromo0_.bpdPrice as bpdPrice16_0_, brandpromo0_.bpdPriceType as bpdPrice4_16_0_, brandpromo0_.bpdPromoCreatedBy as bpdPromo5_16_0_, brandpromo0_.bpdPromoDescription as bpdPromo6_16_0_, brandpromo0_.bpdPromoName as bpdPromo7_16_0_, brandpromo0_.bpdUnitPrice as bpdUnitP8_16_0_, brandpromo0_.bpdWOMPowerCondition as bpdWOMPo9_16_0_ from WOMPOWER.BrandPromoDetails brandpromo0_ where brandpromo0_.bpdBrand_id=?|#]
[#|2011-02-23T22:34:04.742+0530|SEVERE|glassfish3.0.1|javax.enterprise.system.std.com.sun.enterprise.v3.services.impl|_ThreadID=91;_ThreadName=Thread-1;|29930 [http-thread-pool-8080-(1)] WARN org.hibernate.util.JDBCExceptionReporter - SQL Error: 20000, SQLState: 22005
|#]
[#|2011-02-23T22:34:04.742+0530|SEVERE|glassfish3.0.1|javax.enterprise.system.std.com.sun.enterprise.v3.services.impl|_ThreadID=91;_ThreadName=Thread-1;|29930 [http-thread-pool-8080-(1)] ERROR org.hibernate.util.JDBCExceptionReporter - An attempt was made to get a data value of type 'java.sql.Types 91' from a data value of type 'int'.
|#]
[#|2011-02-23T22:34:04.758+0530|SEVERE|glassfish3.0.1|javax.enterprise.system.std.com.sun.enterprise.v3.services.impl|_ThreadID=91;_ThreadName=Thread-1;|29946 [http-thread-pool-8080-(1)] WARN org.hibernate.engine.loading.LoadContexts - fail-safe cleanup (collections) : org.hibernate.engine.loading.CollectionLoadContext@a27c32<rs=com.sun.gjc.spi.jdbc40.ResultSetWrapper40@184aa30>
|#]
[#|2011-02-23T22:34:04.758+0530|SEVERE|glassfish3.0.1|javax.enterprise.system.std.com.sun.enterprise.v3.services.impl|_ThreadID=91;_ThreadName=Thread-1;|29946 [http-thread-pool-8080-(1)] WARN org.hibernate.engine.loading.CollectionLoadContext - On CollectionLoadContext#cleanup, localLoadingCollectionKeys contained [1] entries
|#]
[#|2011-02-23T22:34:04.758+0530|SEVERE|glassfish3.0.1|com.wompower.backing.search.SearchRegistry|_ThreadID=91;_ThreadName=Thread-1;|The log message is null.
com.wompower.entity.accessor.common.EntityAccessorException: org.hibernate.exception.DataException: could not initialize a collection: [com.wompower.entity.brand.Brand.brandPromoDetails#1]
at com.wompower.entity.accessor.common.AbstractEntityAccessor.doSearchInTransaction(AbstractEntityAccessor.java:137)
at com.wompower.backing.search.SearchRegistry.getBuySearchResult(SearchRegistry.java:99)
at com.wompower.backing.search.SearchBacking.buySearch(SearchBacking.java:65)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:613)
at com.sun.el.parser.AstValue.invoke(AstValue.java:234)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:98)
at com.sun.faces.facelets.tag.jsf.core.DeclarativeSystemEventListener.processEvent(EventHandler.java:121)
at javax.faces.component.UIComponent$ComponentSystemEventListenerAdapter.processEvent(UIComponent.java:2345)
at javax.faces.event.SystemEvent.processListener(SystemEvent.java:102)
at com.sun.faces.application.ApplicationImpl.processListeners(ApplicationImpl.java:1993)
at com.sun.faces.application.ApplicationImpl.invokeComponentListenersFor(ApplicationImpl.java:1941)
at com.sun.faces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:285)
at com.sun.faces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:243)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:114)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:313)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:215)
at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:79)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:277)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
at com.sun.grizzly.ContextTask.run(ContextTask.java:69)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)
at java.lang.Thread.run(Thread.java:729)
Caused by: org.hibernate.exception.DataException: could not initialize a collection: [com.wompower.entity.brand.Brand.brandPromoDetails#1]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:102)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.loader.Loader.loadCollection(Loader.java:2173)
at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:62)
at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:627)
at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:83)
at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1863)
at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:369)
at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:111)
at org.hibernate.collection.PersistentList.iterator(PersistentList.java:138)
at java.util.AbstractCollection.addAll(AbstractCollection.java:334)
at com.wompower.backing.search.SearchRegistry$2.execute(SearchRegistry.java:126)
at com.wompower.backing.search.SearchRegistry$2.execute(SearchRegistry.java:1)
at com.wompower.entity.accessor.common.AbstractEntityAccessor.doSearchInTransaction(AbstractEntityAccessor.java:121)
... 49 more
Caused by: java.sql.SQLDataException: An attempt was made to get a data value of type 'java.sql.Types 91' from a data value of type 'int'.
at org.apache.derby.client.am.SQLExceptionFactory40.getSQLException(Unknown Source)
at org.apache.derby.client.am.SqlException.getSQLException(Unknown Source)
at org.apache.derby.client.am.ResultSet.getInt(Unknown Source)
at org.apache.derby.client.am.ResultSet.getInt(Unknown Source)
at com.sun.gjc.spi.base.ResultSetWrapper.getInt(ResultSetWrapper.java:459)
at org.hibernate.type.descriptor.sql.IntegerTypeDescriptor$2.doExtract(IntegerTypeDescriptor.java:61)
at org.hibernate.type.descriptor.sql.BasicExtractor.extract(BasicExtractor.java:64)
at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:253)
at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:249)
at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:229)
at org.hibernate.persister.collection.AbstractCollectionPersister.readIndex(AbstractCollectionPersister.java:768)
at org.hibernate.collection.PersistentList.readFrom(PersistentList.java:402)
at org.hibernate.loader.Loader.readCollectionElement(Loader.java:1156)
at org.hibernate.loader.Loader.readCollectionElements(Loader.java:774)
at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:622)
at org.hibernate.loader.Loader.doQuery(Loader.java:829)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:274)
at org.hibernate.loader.Loader.loadCollection(Loader.java:2166)
... 60 more
Caused by: org.apache.derby.client.am.ColumnTypeConversionException: An attempt was made to get a data value of type 'java.sql.Types 91' from a data value of type 'int'.
at org.apache.derby.client.am.Cursor.getInt(Unknown Source)
... 76 more
|#]
问题在于OneToMany关系在Date值上添加了OrderColumn属性。这就产生了问题。一旦我删除，它工作正常。