web-dev-qa-db-ja.com

コレクションの遅延初期化に失敗しました。セッションまたはセッションが閉じられませんでした

私は他に何を試すべきかわかりません、ジャクソン2に更新しました、レイジーに変更し、@ JsonIgnoreを使用しました...しかし何もうまくいきませんでした。何ができるのでしょうか？

環境

  • Spring MVC 3.2.5
  • ジャクソン2.2
  • Hibernate 3.5.4

[〜＃〜] error [〜＃〜] Estado HTTP 500-JSONを書き込めませんでした：ロールのコレクションの遅延初期化に失敗しました：com.javalabs.web.dao.Task.actions、セッションなしまたはセッションが閉じられました（参照チェーンを介して：Java.util.HashMap ["actions"]-> Java.util.ArrayList [0]-> com.javalabs.web.dao.TaskAction ["task"]-> com.javalabs .web.dao.Task ["actions"]）;ネストされた例外はcom.fasterxml.jackson.databind.JsonMappingExceptionです：ロールのコレクションの遅延初期化に失敗しました：com.javalabs.web.dao.Task.actions、セッションまたはセッションは閉じられません（参照チェーン：Java.util.HashMapを使用） ["actions"]-> Java.util.ArrayList [0]-> com.javalabs.web.dao.TaskAction ["task"]-> com.javalabs.web.dao.Task ["actions"]）

エラートレース

org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: failed to lazily initialize a collection of role: com.javalabs.web.dao.Task.actions, no session or session was closed (through reference chain: Java.util.HashMap["actions"]->Java.util.ArrayList[0]->com.javalabs.web.dao.TaskAction["task"]->com.javalabs.web.dao.Task["actions"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: failed to lazily initialize a collection of role: com.javalabs.web.dao.Task.actions, no session or session was closed (through reference chain: Java.util.HashMap["actions"]->Java.util.ArrayList[0]->com.javalabs.web.dao.TaskAction["task"]->com.javalabs.web.dao.Task["actions"])
org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.writeInternal(MappingJackson2HttpMessageConverter.Java:207)
org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.Java:179)
org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.Java:148)
org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.Java:90)
org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.Java:189)
org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.Java:69)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.Java:122)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.Java:745)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.Java:686)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.Java:80)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.Java:925)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.Java:856)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.Java:936)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.Java:827)
javax.servlet.http.HttpServlet.service(HttpServlet.Java:620)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.Java:812)
javax.servlet.http.HttpServlet.service(HttpServlet.Java:727)
org.Apache.Tomcat.websocket.server.WsFilter.doFilter(WsFilter.Java:52)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:330)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.Java:118)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.Java:84)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.Java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.Java:103)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.Java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.Java:154)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.Java:45)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.Java:199)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.Java:110)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.Java:50)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.Java:107)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.Java:87)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.Java:192)
org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.Java:160)
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.Java:343)
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.Java:260)
causa raíz

com.fasterxml.jackson.databind.JsonMappingException: failed to lazily initialize a collection of role: com.javalabs.web.dao.Task.actions, no session or session was closed (through reference chain: Java.util.HashMap["actions"]->Java.util.ArrayList[0]->com.javalabs.web.dao.TaskAction["task"]->com.javalabs.web.dao.Task["actions"])
com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.Java:232)
com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.Java:197)
com.fasterxml.jackson.databind.ser.std.StdSerializer.wrapAndThrow(StdSerializer.Java:184)
com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.Java:605)
com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.Java:142)
com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.Java:569)
com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.Java:597)
com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.Java:142)
com.fasterxml.jackson.databind.ser.impl.IndexedListSerializer.serializeContents(IndexedListSerializer.Java:100)
com.fasterxml.jackson.databind.ser.impl.IndexedListSerializer.serializeContents(IndexedListSerializer.Java:21)
com.fasterxml.jackson.databind.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.Java:186)
com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeFields(MapSerializer.Java:394)
com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.Java:315)
com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.Java:27)
com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.Java:118)
com.fasterxml.jackson.databind.ObjectMapper.writeValue(ObjectMapper.Java:1819)
org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.writeInternal(MappingJackson2HttpMessageConverter.Java:204)
org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.Java:179)
org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.Java:148)
org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.Java:90)
org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.Java:189)
org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.Java:69)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.Java:122)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.Java:745)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.Java:686)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.Java:80)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.Java:925)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.Java:856)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.Java:936)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.Java:827)
javax.servlet.http.HttpServlet.service(HttpServlet.Java:620)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.Java:812)
javax.servlet.http.HttpServlet.service(HttpServlet.Java:727)
org.Apache.Tomcat.websocket.server.WsFilter.doFilter(WsFilter.Java:52)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:330)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.Java:118)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.Java:84)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.Java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.Java:103)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.Java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.Java:154)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.Java:45)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.Java:199)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.Java:110)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.Java:50)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.Java:107)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.Java:87)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.Java:192)
org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.Java:160)
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.Java:343)
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.Java:260)
causa raíz

org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.javalabs.web.dao.Task.actions, no session or session was closed
org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.Java:383)
org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.Java:375)
org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.Java:368)
org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.Java:111)
org.hibernate.collection.PersistentBag.iterator(PersistentBag.Java:272)
com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.Java:90)
com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.Java:23)
com.fasterxml.jackson.databind.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.Java:186)
com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.Java:569)
com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.Java:597)
com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.Java:142)
com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.Java:569)
com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.Java:597)
com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.Java:142)
com.fasterxml.jackson.databind.ser.impl.IndexedListSerializer.serializeContents(IndexedListSerializer.Java:100)
com.fasterxml.jackson.databind.ser.impl.IndexedListSerializer.serializeContents(IndexedListSerializer.Java:21)
com.fasterxml.jackson.databind.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.Java:186)
com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeFields(MapSerializer.Java:394)
com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.Java:315)
com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.Java:27)
com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.Java:118)
com.fasterxml.jackson.databind.ObjectMapper.writeValue(ObjectMapper.Java:1819)
org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.writeInternal(MappingJackson2HttpMessageConverter.Java:204)
org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.Java:179)
org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.Java:148)
org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.Java:90)
org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.Java:189)
org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.Java:69)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.Java:122)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.Java:745)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.Java:686)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.Java:80)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.Java:925)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.Java:856)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.Java:936)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.Java:827)
javax.servlet.http.HttpServlet.service(HttpServlet.Java:620)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.Java:812)
javax.servlet.http.HttpServlet.service(HttpServlet.Java:727)
org.Apache.Tomcat.websocket.server.WsFilter.doFilter(WsFilter.Java:52)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:330)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.Java:118)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.Java:84)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.Java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.Java:103)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.Java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.Java:154)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.Java:45)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.Java:199)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.Java:110)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.Java:50)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.Java:107)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.Java:87)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.Java:342)
org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.Java:192)
org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.Java:160)
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.Java:343)
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.Java:260)

[〜＃〜] model [〜＃〜]

enter image description here

TaskController.Java

@Controller
public class TaskController {

...

    @RequestMapping(value = "/getactions/{id}", method = RequestMethod.GET, produces = "application/json")
    public @ResponseBody Map<String, Object> getActions(Principal principal,
            @PathVariable Long id) {
        logger.info("Task controller get actions...");

        List<TaskAction> actions = null;

        if (principal == null) {
            actions = new ArrayList<TaskAction>();
        } else {
            actions = taskActionService.getAllTaskActions(id);
        }

        Map<String, Object> data = new HashMap<String, Object>();
        data.put("actions", actions);
        data.put("number", actions.size());

        return data;
    }
}

Task.Java

@Entity
@Table(name = "t_task")
public class Task {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "idTask")
    private long idTask;
    @Size(min = 5, max = 100)
    @Column(name = "taskname")
    private String taskname;
    ...
    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "task", orphanRemoval = true)
    private List<TaskAction> actions = new ArrayList<TaskAction>();
    @Column(name = "timestamp")
    private Timestamp timestamp;
...
}

ser.Java @Entity @Table（name = "t_user"）public class User {

@Id
@GeneratedValue(strategy=GenerationType.AUTO)
@Column(name = "idUser")
private long idUser;

...

@ManyToMany(cascade = { CascadeType.ALL })
@JsonIgnore
@JoinTable(name = "r_userrole", joinColumns = { @JoinColumn(name = "idUser") }, inverseJoinColumns = { @JoinColumn(name = "idRole") })
private Set<Role> roles = new HashSet<Role>();

...}

TaskAction.Java

@Entity
@Table(name = "t_taskaction")
public class TaskAction {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "idTaskAction")
    private long idTaskAction;
    @ManyToOne
    @JoinColumn(name = "idTask", nullable = false)
    private Task task;
    ...
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "idUser", nullable = false)
    private User user;
    @Column(name = "timestamp")
    private Date timestamp;
    ...
}

TaskActionDao.Java

@Repository
@Transactional
@Component("taskActionDao")
public class TaskActionDao {

    @Autowired
    private SessionFactory sessionFactory;

    public Session session() {
        return sessionFactory.getCurrentSession();
    }

    ...

    @SuppressWarnings("unchecked")
    public List<TaskAction> getAllTaskActions() {
        Query q = session().createQuery("from TaskAction");
        List<TaskAction> la = q.list();
        //createQuery("from TaskAction").list();
        System.out.println(">>>>>>>>>>getAllActions>>>>>>>>>>> " + la.size());
        return la;
    }

    @SuppressWarnings("unchecked")
    public List<TaskAction> getAllTaskActions(long idTask) {
        Criteria crit = session().createCriteria(TaskAction.class);
        crit.add(Restrictions.eq("task.idTask", idTask));
        System.out.println(">>>>>>>>getAllActions(id)>>>>>>>>>>>>> " + crit.list().size());
        return crit.list();
    }
}
javaspringhibernatesessionjackson
14
Joe

まず第一に、ここではUser.Javaはまったく必要ありません。それには何もありません。この問題はTask.actionsに関連しています。 TaskActionのコレクションをロードします。TaskActionにはTaskがあり、このTaskには初期化できないTaskActionのコレクションがあります。以下に@JsonIgnoreを追加できます。

private List<TaskAction> actions = new ArrayList<TaskAction>(); //Task class

または：

private Task task; //TaskAction class

Task.JavaのアクションのコレクションでFetchType.LAZYをFetchType.EAGERに変更することもできますが、動作するかどうかはわかりません（循環参照）

15
maszter

Hibernate Sessionオブジェクトの外部でオブジェクトにアクセスしているため、モデルの各@OneToManyアノテーションの前にアノテーション@JsonIgnoreを追加する必要があります。

6
Tribuwan Singh

エンティティクラスの各@OneToManyアノテーションの前にアノテーション@JsonIgnoreを追加してください

@JsonIgnore
@OneToMany(cascade = CascadeType.ALL, mappedBy = "domainDataId")

ありがとう、Shahid Hussain Abbasi

2
Shahid Hussain Abbasi

上記と同じ例外を示す問題があり、「セッションなし」について不平を言っていましたが、問題はIDではなくDTOで参照されているエンティティが原因であることがわかりました。したがって、上記の問題が発生した場合に備えて、シリアル化の問題が発生していないかどうかを確認することをお勧めします。

0
Yoku

私は最近、同様の問題に遭遇しました：ジャクソンバージョン1.9以前（両方向関係）（サイクルを回避）

そして、ソリューションはJackson 2.0にアップグレードし、クラスに次の注釈を追加するようです。

@JsonIdentityInfo(generator = ObjectIdGenerators.IntSequenceGenerator.class, 
                  property = "idTaskAction")
public class TaskAction

詳細

0
Joe