2
好吧，我正在處理的應用程序中得到上述異常。我正在使用JPA和休眠。這裏是堆棧跟蹤：無法懶惰地初始化一個集合，沒有會話或會話被關閉（儘管急切地提取）
WARNING: #{commissionController.saveCommission}: javax.persistence.PersistenceException: org.hibernate.LazyInitializationException: failed to lazily initialize a collection, no session or session was closed
javax.faces.FacesException: #{commissionController.saveCommission}: javax.persistence.PersistenceException: org.hibernate.LazyInitializationException: failed to lazily initialize a collection, no session or session was closed
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118)
at org.apache.myfaces.extensions.cdi.jsf.impl.security.SecurityViolationAwareActionListener.processAction(SecurityViolationAwareActionListener.java:56)
at org.apache.myfaces.extensions.cdi.jsf.impl.config.view.ViewControllerActionListener.processAction(ViewControllerActionListener.java:68)
at org.apache.myfaces.extensions.cdi.jsf.impl.listener.action.CodiActionListener.processAction(CodiActionListener.java:58)
at javax.faces.component.UICommand.broadcast(UICommand.java:315)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at org.apache.myfaces.extensions.cdi.jsf2.impl.listener.phase.CodiLifecycleWrapper.execute(CodiLifecycleWrapper.java:95)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Caused by: javax.faces.el.EvaluationException: javax.persistence.PersistenceException: org.hibernate.LazyInitializationException: failed to lazily initialize a collection, no session or session was closed
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
... 27 more
Caused by: javax.persistence.PersistenceException: org.hibernate.LazyInitializationException: failed to lazily initialize a collection, no session or session was closed
at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1377)
at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1300)
at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1306)
at org.hibernate.ejb.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:888)
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:601)
at org.jboss.weld.bean.proxy.AbstractBeanInstance.invoke(AbstractBeanInstance.java:45)
at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:105)
at org.jboss.weld.proxies.EntityManager$1148094400$Proxy$_$$_WeldClientProxy.merge(EntityManager$1148094400$Proxy$_$$_WeldClientProxy.java)
at se.raindance.persistence.RaindanceBaseHomeImpl.update(RaindanceBaseHomeImpl.java:57)
at se.raindance.purchasecommission.home.CommissionHome.update(CommissionHome.java:59)
at se.raindance.purchasecommission.home.CommissionHome$Proxy$_$$_WeldSubclass.update(CommissionHome$Proxy$_$$_WeldSubclass.java)
at se.raindance.persistence.RaindanceBaseHomeImpl.persist(RaindanceBaseHomeImpl.java:67)
at se.raindance.purchasecommission.home.CommissionHome.persist(CommissionHome.java:43)
at se.raindance.purchasecommission.home.CommissionHome$Proxy$_$$_WeldSubclass.persist(CommissionHome$Proxy$_$$_WeldSubclass.java)
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:601)
at org.jboss.weld.interceptor.proxy.SimpleInterceptionChain.invokeNextInterceptor(SimpleInterceptionChain.java:85)
at org.jboss.weld.interceptor.proxy.InterceptorInvocationContext.proceed(InterceptorInvocationContext.java:127)
at org.apache.myfaces.extensions.cdi.jpa.impl.transaction.TransactionalInterceptorStrategy.execute(TransactionalInterceptorStrategy.java:125)
at org.apache.myfaces.extensions.cdi.jpa.impl.transaction.TransactionalInterceptor.executeInTransaction(TransactionalInterceptor.java:54)
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:601)
at org.jboss.weld.interceptor.proxy.SimpleMethodInvocation.invoke(SimpleMethodInvocation.java:30)
at org.jboss.weld.interceptor.proxy.SimpleInterceptionChain.invokeNextInterceptor(SimpleInterceptionChain.java:69)
at org.jboss.weld.interceptor.proxy.InterceptorMethodHandler.executeInterception(InterceptorMethodHandler.java:112)
at org.jboss.weld.interceptor.proxy.InterceptorMethodHandler.invoke(InterceptorMethodHandler.java:88)
at org.jboss.weld.bean.proxy.CombinedInterceptorAndDecoratorStackMethodHandler.invoke(CombinedInterceptorAndDecoratorStackMethodHandler.java:55)
at se.raindance.purchasecommission.home.CommissionHome$Proxy$_$$_WeldSubclass.persist(CommissionHome$Proxy$_$$_WeldSubclass.java)
at se.raindance.purchasecommission.controller.CommissionController.saveCommission(CommissionController.java:139)
at se.raindance.purchasecommission.controller.CommissionController$Proxy$_$$_WeldClientProxy.saveCommission(CommissionController$Proxy$_$$_WeldClientProxy.java)
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:601)
at org.apache.el.parser.AstValue.invoke(AstValue.java:278)
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:274)
at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:39)
at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
... 28 more
Caused by: org.hibernate.LazyInitializationException: failed to lazily initialize a collection, no session or session was closed
at org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:489)
at org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:447)
at org.hibernate.collection.internal.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:139)
at org.hibernate.collection.internal.PersistentBag.isEmpty(PersistentBag.java:249)
at se.raindance.purchasecommission.domain.Form.removeHiddenFields(Form.java:197)
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:601)
at org.hibernate.ejb.event.BeanCallback.invoke(BeanCallback.java:39)
at org.hibernate.ejb.event.EntityCallbackHandler.callback(EntityCallbackHandler.java:110)
at org.hibernate.ejb.event.EntityCallbackHandler.postLoad(EntityCallbackHandler.java:103)
at org.hibernate.ejb.event.EJB3PostLoadEventListener.onPostLoad(EJB3PostLoadEventListener.java:49)
at org.hibernate.engine.internal.TwoPhaseLoad.doInitializeEntity(TwoPhaseLoad.java:292)
at org.hibernate.engine.internal.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:134)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:999)
at org.hibernate.loader.Loader.doQuery(Loader.java:878)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:293)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:263)
at org.hibernate.loader.Loader.loadEntity(Loader.java:1977)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:82)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:72)
at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3821)
at org.hibernate.event.internal.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:458)
at org.hibernate.event.internal.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:427)
at org.hibernate.event.internal.DefaultLoadEventListener.load(DefaultLoadEventListener.java:204)
at org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:260)
at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:148)
at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1079)
at org.hibernate.internal.SessionImpl.internalLoad(SessionImpl.java:1006)
at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:613)
at org.hibernate.type.EntityType.resolve(EntityType.java:441)
at org.hibernate.type.EntityType.replace(EntityType.java:298)
at org.hibernate.type.AbstractType.replace(AbstractType.java:178)
at org.hibernate.type.TypeHelper.replace(TypeHelper.java:211)
at org.hibernate.event.internal.DefaultMergeEventListener.copyValues(DefaultMergeEventListener.java:409)
at org.hibernate.event.internal.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:214)
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:154)
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:76)
at org.hibernate.internal.SessionImpl.fireMerge(SessionImpl.java:904)
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:888)
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:892)
at org.hibernate.ejb.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:879)
... 71 more
feb 20, 2013 11:27:26 FM org.apache.deltaspike.core.api.provider.BeanProvider logWarningIfDependent
WARNING: BeanProvider shall not be used to create @Dependent scoped beans. Bean: Managed Bean [class se.raindance.webutil.cdi.common.HandlesGeneric] with qualifiers [@Any @Default]
feb 20, 2013 11:27:26 FM org.apache.deltaspike.core.api.provider.BeanProvider logWarningIfDependent
WARNING: BeanProvider shall not be used to create @Dependent scoped beans. Bean: Managed Bean [class se.raindance.webutil.cdi.common.HandlesPersistence] with qualifiers [@Any @Default]
2013-02-20 11:27:26,808 [http-bio-8080-exec-8] INFO org.hibernate.event.internal.DefaultLoadEventListener - HHH000327: Error performing load command : org.hibernate.LazyInitializationException: failed to lazily initialize a collection, no session or session was closed
2013-02-20 11:27:26,811 [http-bio-8080-exec-8] WARN org.hibernate.engine.loading.internal.LoadContexts - HHH000100: Fail-safe cleanup (collections) : [email protected]3792<rs[email protected]3308315a[valid=false]>
2013-02-20 11:27:26,812 [http-bio-8080-exec-8] WARN org.hibernate.engine.loading.internal.CollectionLoadContext - HHH000160: On CollectionLoadContext#cleanup, localLoadingCollectionKeys contained [1] entries
2013-02-20 11:27:26,822 [http-bio-8080-exec-8] ERROR se.raindance.webutil.cdi.common.HandlesGeneric - Printing stacktrace: -91600366
org.hibernate.LazyInitializationException: failed to lazily initialize a collection, no session or session was closed
at org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:489)
at org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:447)
at org.hibernate.collection.internal.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:139)
at org.hibernate.collection.internal.PersistentBag.isEmpty(PersistentBag.java:249)
at se.raindance.purchasecommission.domain.Form.removeHiddenFields(Form.java:197)
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:601)
at org.hibernate.ejb.event.BeanCallback.invoke(BeanCallback.java:39)
at org.hibernate.ejb.event.EntityCallbackHandler.callback(EntityCallbackHandler.java:110)
at org.hibernate.ejb.event.EntityCallbackHandler.postLoad(EntityCallbackHandler.java:103)
at org.hibernate.ejb.event.EJB3PostLoadEventListener.onPostLoad(EJB3PostLoadEventListener.java:49)
at org.hibernate.engine.internal.TwoPhaseLoad.doInitializeEntity(TwoPhaseLoad.java:292)
at org.hibernate.engine.internal.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:134)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:999)
at org.hibernate.loader.Loader.doQuery(Loader.java:878)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:293)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:263)
at org.hibernate.loader.Loader.loadEntity(Loader.java:1977)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:82)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:72)
at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3821)
at org.hibernate.event.internal.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:458)
at org.hibernate.event.internal.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:427)
at org.hibernate.event.internal.DefaultLoadEventListener.load(DefaultLoadEventListener.java:204)
at org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:260)
at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:148)
at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1079)
at org.hibernate.internal.SessionImpl.internalLoad(SessionImpl.java:1006)
at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:613)
at org.hibernate.type.EntityType.resolve(EntityType.java:441)
at org.hibernate.type.EntityType.replace(EntityType.java:298)
at org.hibernate.type.AbstractType.replace(AbstractType.java:178)
at org.hibernate.type.TypeHelper.replace(TypeHelper.java:211)
at org.hibernate.event.internal.DefaultMergeEventListener.copyValues(DefaultMergeEventListener.java:409)
at org.hibernate.event.internal.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:214)
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:154)
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:76)
at org.hibernate.internal.SessionImpl.fireMerge(SessionImpl.java:904)
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:888)
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:892)
at org.hibernate.ejb.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:879)
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:601)
at org.jboss.weld.bean.proxy.AbstractBeanInstance.invoke(AbstractBeanInstance.java:45)
at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:105)
at org.jboss.weld.proxies.EntityManager$1148094400$Proxy$_$$_WeldClientProxy.merge(EntityManager$1148094400$Proxy$_$$_WeldClientProxy.java)
at se.raindance.persistence.RaindanceBaseHomeImpl.update(RaindanceBaseHomeImpl.java:57)
at se.raindance.purchasecommission.home.CommissionHome.update(CommissionHome.java:59)
at se.raindance.purchasecommission.home.CommissionHome$Proxy$_$$_WeldSubclass.update(CommissionHome$Proxy$_$$_WeldSubclass.java)
at se.raindance.persistence.RaindanceBaseHomeImpl.persist(RaindanceBaseHomeImpl.java:67)
at se.raindance.purchasecommission.home.CommissionHome.persist(CommissionHome.java:43)
at se.raindance.purchasecommission.home.CommissionHome$Proxy$_$$_WeldSubclass.persist(CommissionHome$Proxy$_$$_WeldSubclass.java)
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:601)
at org.jboss.weld.interceptor.proxy.SimpleInterceptionChain.invokeNextInterceptor(SimpleInterceptionChain.java:85)
at org.jboss.weld.interceptor.proxy.InterceptorInvocationContext.proceed(InterceptorInvocationContext.java:127)
at org.apache.myfaces.extensions.cdi.jpa.impl.transaction.TransactionalInterceptorStrategy.execute(TransactionalInterceptorStrategy.java:125)
at org.apache.myfaces.extensions.cdi.jpa.impl.transaction.TransactionalInterceptor.executeInTransaction(TransactionalInterceptor.java:54)
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:601)
at org.jboss.weld.interceptor.proxy.SimpleMethodInvocation.invoke(SimpleMethodInvocation.java:30)
at org.jboss.weld.interceptor.proxy.SimpleInterceptionChain.invokeNextInterceptor(SimpleInterceptionChain.java:69)
at org.jboss.weld.interceptor.proxy.InterceptorMethodHandler.executeInterception(InterceptorMethodHandler.java:112)
at org.jboss.weld.interceptor.proxy.InterceptorMethodHandler.invoke(InterceptorMethodHandler.java:88)
at org.jboss.weld.bean.proxy.CombinedInterceptorAndDecoratorStackMethodHandler.invoke(CombinedInterceptorAndDecoratorStackMethodHandler.java:55)
at se.raindance.purchasecommission.home.CommissionHome$Proxy$_$$_WeldSubclass.persist(CommissionHome$Proxy$_$$_WeldSubclass.java)
at se.raindance.purchasecommission.controller.CommissionController.saveCommission(CommissionController.java:139)
at se.raindance.purchasecommission.controller.CommissionController$Proxy$_$$_WeldClientProxy.saveCommission(CommissionController$Proxy$_$$_WeldClientProxy.java)
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:601)
at org.apache.el.parser.AstValue.invoke(AstValue.java:278)
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:274)
at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:39)
at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
at org.apache.myfaces.extensions.cdi.jsf.impl.security.SecurityViolationAwareActionListener.processAction(SecurityViolationAwareActionListener.java:56)
at org.apache.myfaces.extensions.cdi.jsf.impl.config.view.ViewControllerActionListener.processAction(ViewControllerActionListener.java:68)
at org.apache.myfaces.extensions.cdi.jsf.impl.listener.action.CodiActionListener.processAction(CodiActionListener.java:58)
at javax.faces.component.UICommand.broadcast(UICommand.java:315)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at org.apache.myfaces.extensions.cdi.jsf2.impl.listener.phase.CodiLifecycleWrapper.execute(CodiLifecycleWrapper.java:95)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
調試時，我注意到它似乎來自代碼在Form實體的一部分：
@PostLoad
public void removeHiddenFields() {
if(fields.isEmpty()) {
return;//don't do anything if there are no fields
}
for(int i = 0; i < fields.size(); i++) {
if(fields.get(i).isHidden()) {
fields.remove(fields.get(i));
}
}
}
的部分「fields.isEmpty（）」拋出向上的例外。
從我讀過的內容來看，這應該是可以通過設置一個集合來解決的。我認爲問題是字段集合。但是...
@JoinColumn(name = "FORM")
@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
private List<Field> fields = new ArrayList<Field>();
它已經在踊躍提取。必須這樣做才能解決開發過程中遇到的另一個問題。
可能是什麼問題？
補充：
實體加載爲這樣的形式：
存在一個處理數據庫查詢該表的實體類。有兩種從DB獲取它們的方法（取決於哪種類型的表單）。
public List<Form> getAllActiveForms() {
TypedQuery<Form> query = this.getEntityManager().createNamedQuery(
"getAllActiveForms", Form.class);
return query.getResultList();
}
public List<Form> getAllInactiveForms() {
TypedQuery<Form> query = this.getEntityManager().createNamedQuery(
"getAllInactiveForms", Form.class);
return query.getResultList();
}
命名查詢被定義爲這樣的形式的實體：
@NamedQueries({
@NamedQuery(name = "getAllActiveForms", query = "SELECT f FROM Form f WHERE f.isEnabled=true"),
@NamedQuery(name = "getAllInactiveForms", query = "SELECT f FROM Form f WHERE f.isEnabled=false") })
是在函數中使用的「currentForm」從這些名單中的一個採摘。
我現在也注意到，應用程序中的另一個函數只是簡單地更新一個Form，現在拋出了相同類型的異常。這次它來自merge（）函數：
@Transactional
public Form updateAndReturn() {
getInstance().setTimestamp(System.currentTimeMillis());
Form f = getEntityManager().merge(getInstance());
getEntityManager().flush();
return f;
}