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  1. ,
    via Stack Overflow by JamesENL

    Use the proper ORM annotations (@ManyToOne and @OneToMany).

  2. ,
    via Stack Overflow by Kleber Mota

    Use eager fetch (fetch = FetchType.EAGER) annotation.

Solutions on the web

via Stack Overflow by Firzen
, 1 year ago
failed to lazily initialize a collection of role: cz.bach.dataframe2.domain.impl.BaseEntityImpl.children, could not initialize proxy - no Session
via Stack Overflow by Kleber Mota
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failed to lazily initialize a collection of role: com.horariolivre.entity.Usuario.autorizacoes, could not initialize proxy - no Session
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, 2 years ago
failed to lazily initialize a collection of role: com.vub.model.Traject.courses, could not initialize proxy - no Session
via Stack Overflow by Teharez
, 5 months ago
failed to lazily initialize a collection of role: com.company.middleware.microservices.business.util.domain.releasenotes.ReleaseFunction.disabledSubsidiaries, could not initialize proxy - no Session
via Google Groups by Mohammed el azzouzi, 6 months ago
failed to lazily initialize a collection of role: com.salesmanager.core.model.order.orderproduct.OrderProduct.orderAttributes,
via Stack Overflow by Thiago Pereira
, 1 year ago
failed to lazily initialize a collection of role: br.com.coderi.adi.model.Usuario.papeis, could not initialize proxy - no Session
org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: cz.bach.dataframe2.domain.impl.BaseEntityImpl.children, could not initialize proxy - no Session	at org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:566)	at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:186)	at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:545)	at org.hibernate.collection.internal.AbstractPersistentCollection.read(AbstractPersistentCollection.java:124)	at org.hibernate.collection.internal.PersistentSet.iterator(PersistentSet.java:180)	at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:95)	at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:60)	at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:68)	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:89)	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:195)	at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:68)	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:89)	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:195)	at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:68)	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:89)	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:195)	at com.google.gson.Gson.toJson(Gson.java:593)	at com.google.gson.Gson.toJson(Gson.java:572)	at com.google.gson.Gson.toJson(Gson.java:527)	at com.google.gson.Gson.toJson(Gson.java:507)	at cz.bach.clients.du.model.service.DUSerializer.serialize(DUSerializer.java:23)	at cz.bach.clients.du.model.service.DURepository.save(DURepository.java:619)	at cz.bach.clients.du.model.service.DURepository.appendChild(DURepository.java:176)	at cz.bach.clients.du.model.service.DURepository.appendChild(DURepository.java:150)	at cz.bach.clients.du.model.service.DURepository$$FastClassByCGLIB$$f2fe0d5d.invoke()	at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:191)	at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:689)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:90)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)	at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:622)	at cz.bach.clients.du.model.service.DURepository$$EnhancerByCGLIB$$a27cbe9c.appendChild()	at cz.bach.clients.du.ui.perspectives.main.DUDispatcher.add(DUDispatcher.java:261)	at cz.bach.archives.uiframe.actions.CommonAddAction.run(CommonAddAction.java:11)	at cz.bach.clients.du.ui.perspectives.main.DUToolbar$1.buttonClick(DUToolbar.java:71)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)	at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)	at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1219)	at com.vaadin.ui.Button.fireClick(Button.java:567)	at com.vaadin.ui.Button.changeVariables(Button.java:223)	at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.changeVariables(AbstractCommunicationManager.java:1460)	at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariableBurst(AbstractCommunicationManager.java:1404)	at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1329)	at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:761)	at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:325)	at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:501)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:83)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)	at java.lang.Thread.run(Unknown Source)