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Java org.hibernate.objectexception。如何修复它?_Java_Spring_Hibernate_Orm - Fatal编程技术网

Java org.hibernate.objectexception。如何修复它?

Java org.hibernate.objectexception。如何修复它?,java,spring,hibernate,orm,Java,Spring,Hibernate,Orm,在我的模型中有3个实体(实际上超过3个,但实际上在这种情况下有3个) 候选人 空缺 事件 它们都有多对多的关系(候选人可能有许多空缺和许多事件,空缺…候选人和…事件…) 如果我更新候选人-好结果。 如果我更新空缺-效果良好 但如果我更新事件,我就有了org.hibernate.ununiqueobjectexception 当我在事件中更改空缺集合时显示。如果我评论地点,我在哪里更改活动空缺,我没有问题(我的代码中的地点ONE) 转到代码: 模型映射: 空缺: @Entity @Table(na

在我的模型中有3个实体(实际上超过3个,但实际上在这种情况下有3个)

  • 候选人
  • 空缺
  • 事件
  • 它们都有多对多的关系(候选人可能有许多空缺和许多事件,空缺…候选人和…事件…)

    如果我更新候选人-好结果。 如果我更新空缺-效果良好 但如果我更新事件,我就有了
    org.hibernate.ununiqueobjectexception

    当我在事件中更改空缺集合时显示。如果我评论地点,我在哪里更改活动空缺,我没有问题(我的代码中的地点
    ONE
    ) 转到代码: 模型映射:

    空缺:

    @Entity
    @Table(name = "vacancy")
    @XmlRootElement(name="vacancy")
    public class Vacancy {
    
        private Integer id;
    
        private String name;
    
        private String description;
    
        private Date date;
    
        private User author;
    
        @XmlTransient
        private Set<Candidate> candidates = new HashSet<Candidate>();
        private Set<VacancyStatus> statusList = new HashSet<VacancyStatus>();
        private Set<Skill> skills = new HashSet<Skill>();
        private Set<Note> comments = new HashSet<Note>();
        private Set<Event> events = new HashSet<Event>();
    
        public Vacancy() {
            super();
        }
    
        @ManyToMany(mappedBy = "vacancies", fetch = FetchType.EAGER)
        public Set<Event> getEvents() {
            return events;
        }
    
        public void setEvents(Set<Event> events) {
            this.events = events;
        }
    
    
    
    
        @Id
        @GeneratedValue(strategy = GenerationType.IDENTITY)
        @Column(name = "id")
        public Integer getId() {
            return id;
        }
    
        public void setId(Integer id) {
            this.id = id;
        }
    
    
    
        @ManyToMany(mappedBy = "vacancies", fetch = FetchType.EAGER)
        public Set<Candidate> getCandidates() {
            return candidates;
        }
    
        public void setCandidates(Set<Candidate> candidates) {
            this.candidates = candidates;
        }
    
    
        @Override
        public boolean equals(Object obj) {
            if(obj!= null && ((Vacancy)obj).getId() == id ){
                return true;
            }
            return false;
        }
        @Override
        public int hashCode() {
            Integer id = getId();
            return id != null ? id.intValue() : super.hashCode();
        }
        ...
    }
    
    抱歉,代码太多/但我不知道该怎么写)

    更新1

    堆栈跟踪:

    10.09.2013 11:46:14 org.apache.catalina.core.StandardWrapperValve invoke
    SEVERE: Servlet.service() for servlet [appServlet] in context with path [/ui] threw exception [Request processing failed; nested exception is org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: [com.epam.hhsystem.model.vacancy.Vacancy#6]] with root cause
    org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: [com.epam.hhsystem.model.vacancy.Vacancy#6]
        at org.hibernate.engine.internal.StatefulPersistenceContext.checkUniqueness(StatefulPersistenceContext.java:697)
        at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:296)
        at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:241)
        at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:109)
        at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
        at org.hibernate.internal.SessionImpl.fireSaveOrUpdate(SessionImpl.java:735)
        at org.hibernate.internal.SessionImpl.saveOrUpdate(SessionImpl.java:727)
        at org.hibernate.engine.spi.CascadingAction$5.cascade(CascadingAction.java:258)
        at org.hibernate.engine.internal.Cascade.cascadeToOne(Cascade.java:388)
        at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:331)
        at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:209)
        at org.hibernate.engine.internal.Cascade.cascadeCollectionElements(Cascade.java:418)
        at org.hibernate.engine.internal.Cascade.cascadeCollection(Cascade.java:358)
        at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:334)
        at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:209)
        at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:166)
        at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:132)
        at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.cascadeOnUpdate(DefaultSaveOrUpdateEventListener.java:364)
        at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:338)
        at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:241)
        at org.hibernate.event.internal.DefaultUpdateEventListener.performSaveOrUpdate(DefaultUpdateEventListener.java:55)
        at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
        at org.hibernate.internal.SessionImpl.fireUpdate(SessionImpl.java:786)
        at org.hibernate.internal.SessionImpl.update(SessionImpl.java:778)
        at org.hibernate.internal.SessionImpl.update(SessionImpl.java:774)
        at com.epam.hhsystem.jpa.EventDaoImpl.update(EventDaoImpl.java:45)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
        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.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
        at $Proxy38.update(Unknown Source)
        at com.epam.hhsystem.services.EventService.update(EventService.java:24)
        at com.epam.hhsystem.services.EventService$$FastClassByCGLIB$$3653e1b6.invoke(<generated>)
        at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:698)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
        at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:631)
        at com.epam.hhsystem.services.EventService$$EnhancerByCGLIB$$8266fd26.update(<generated>)
        at com.epam.hhsystem.web.controllers.EventMenuController.updateEvent(EventMenuController.java:164)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)
        at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
        at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
        at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)
        at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686)
        at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
        at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:838)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
        at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
        at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
        at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:183)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
        at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
        at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
        at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        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:947)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1009)
        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$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)
    
    10.09.2013 11:46:14 org.apache.catalina.core.StandardWrapperValve调用
    严重:路径为[/ui]的上下文中Servlet[appServlet]的Servlet.service()引发异常[请求处理失败;嵌套异常为org.hibernate.unUniqueObjectException:具有相同标识符值的另一个对象已与会话[com.epam.hhsystem.model.空缺.空缺#6]]关联,并存在根本原因
    org.hibernate.unUniqueObjectException:具有相同标识符值的另一个对象已与会话关联:[com.epam.hhsystem.model.空缺.空缺#6]
    位于org.hibernate.engine.internal.StatefulPersistenceContext.checkuniversity(StatefulPersistenceContext.java:697)
    位于org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:296)
    位于org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.EntityIsDetailed(DefaultSaveOrUpdateEventListener.java:241)
    位于org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:109)
    位于org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
    位于org.hibernate.internal.SessionImpl.fireSaveOrUpdate(SessionImpl.java:735)
    位于org.hibernate.internal.SessionImpl.saveOrUpdate(SessionImpl.java:727)
    位于org.hibernate.engine.spi.CascadingAction$5.cascade(CascadingAction.java:258)
    位于org.hibernate.engine.internal.Cascade.cascadeToOne(Cascade.java:388)
    位于org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:331)
    位于org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:209)
    位于org.hibernate.engine.internal.Cascade.cascadeCollectionElements(Cascade.java:418)
    位于org.hibernate.engine.internal.Cascade.cascadeCollection(Cascade.java:358)
    位于org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:334)
    位于org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:209)
    位于org.hibernate.engine.internal.Cascade.Cascade(Cascade.java:166)
    位于org.hibernate.engine.internal.Cascade.Cascade(Cascade.java:132)
    位于org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.CascadeUpdate(DefaultSaveOrUpdateEventListener.java:364)
    位于org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:338)
    位于org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.EntityIsDetailed(DefaultSaveOrUpdateEventListener.java:241)
    位于org.hibernate.event.internal.DefaultUpdateEventListener.performSaveOrUpdate(DefaultUpdateEventListener.java:55)
    位于org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
    位于org.hibernate.internal.SessionImpl.fireUpdate(SessionImpl.java:786)
    位于org.hibernate.internal.SessionImpl.update(SessionImpl.java:778)
    位于org.hibernate.internal.SessionImpl.update(SessionImpl.java:774)
    位于com.epam.hhsystem.jpa.EventDaoImpl.update(EventDaoImpl.java:45)
    在sun.reflect.NativeMethodAccessorImpl.invoke0(本机方法)处
    位于sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    在sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)中
    位于java.lang.reflect.Method.invoke(Method.java:597)
    位于org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
    位于org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
    在org.springframework.aop.framework.ReflectiveMethodInvocation.procedue(ReflectiveMethodInvocation.java:150)上
    位于org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
    位于org.springframework.aop.framework.ReflectiveMethodInvocation.procedue(ReflectiveMethodInvocation.java:172)
    位于org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
    $Proxy38.update(来源未知)
    位于com.epam.hhsystem.services.EventService.update(EventService.java:24)
    在com.epam.hhsystem.services.EventService$$FastClassByCGLIB$$3653e1b6.invoke()上
    位于org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
    位于org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:698)
    在org.springframework.aop.framework.ReflectiveMethodInvocation.procedue(ReflectiveMethodInvocation.java:150)上
    位于org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
    位于org.springframework.aop.framework.ReflectiveMethodInvocation.procedue(ReflectiveMethodInvocation.java:172)
    位于org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:631)
    在com.epam.hhsystem.services.EventService$$enhancerbyglib$$8266fd26.update()上
    位于com.epam.hhsystem.web.controllers.EventMenuController.updateEvent(EventMenuController.java:164)
    在sun.reflect.NativeMethodAccessorImpl.invoke0(本机方法)处
    在sun.reflect.Native
    
    @Entity
    @Table(name = "event")
    @XmlRootElement
    public class Event {
        private Integer id;
    
        @Size(min=3 )
        @Pattern(regexp="[a-zA-Z]*")    
        private String name;
    
        @Size(min=5)
        @Pattern(regexp="[a-zA-Z]*")    
        private String description;
    
        private Date date;
    
        @Future
        private Date eventDate;
    
        private User author;
    
        private Set<Candidate> candidates;
        private Set<Vacancy> vacancies;
    
        private EventType eventType;
        private EventStatus eventStatus;
    
        public Event() {
            super();
        }
    
    
    
        @Id
        @GeneratedValue(strategy = GenerationType.IDENTITY)
        @Column(name ="id")
        public Integer getId() {
            return id;
        }
    
        public void setId(Integer id) {
            this.id = id;
        }
    
    
        @Override
        public boolean equals(Object obj) {
            if(obj!=null && ((Event)obj).getId() == id ){
                return true;
            }
            return false;
        }
        @Override
        public int hashCode() {
            Integer id = getId();
            return id != null ? id.intValue() : super.hashCode();
        }
    
        @ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
        public Set<Candidate> getCandidates() {
            return candidates;
        }
    
        public void setCandidates(Set<Candidate> candidates) {
            this.candidates = candidates;
        }
    
        @ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
        public Set<Vacancy> getVacancies() {
            return vacancies;
        }
    
        public void setVacancies(Set<Vacancy> vacancies) {
            this.vacancies = vacancies;
        }
    }
    
    @RequestMapping(value = "/updateEvent", method = RequestMethod.POST)
        public String updateEvent(Model model,
                @Valid @ModelAttribute("existedEvent") Event event,
                BindingResult result,
                @ModelAttribute("linkedCandidates") Set<Candidate> candidates,
                @ModelAttribute("linkedvacancies") Set<Vacancy> vacancies) {
            if (result.hasErrors()) {
                model.addAttribute("idEvent", event.getId());
                return "eventDetails";
            }
            if (vacancies != null) {
                for (Vacancy vacancy : vacancies) {
                    vacancy.getEvents().add(event);
                }
            }
            if (candidates != null) {
                for (Candidate candidate : candidates) {
                    candidate.getEvents().add(event);
                }
            }
            event.setVacancies(vacancies);//place ONE (if comment this line - will //work)
            event.setCandidates(candidates);
            eventService.update(event);//error here
            return "redirect:goToEventMenu";
    
        }
    
    @Transactional
    @Service
    public class EventService {
         public void update(Event event) {
            eventDao.update(event);
        }
    ....
    }
    
    @Repository("eventDaoImpl")
    public class EventDaoImpl extends DaoAbstract implements EventDao {
        @Autowired
        CandidateDao candidateDao;
    
        @Autowired
        VacancyDao  vacancyDao;
    
    
    
        @Override
        public boolean update(Event event) {
            Session session = sessionFactory.getCurrentSession();
            if (event == null) {
                return false;
            }
            session.update(event);
            return true;
        }
    ...
    }
    
    10.09.2013 11:46:14 org.apache.catalina.core.StandardWrapperValve invoke
    SEVERE: Servlet.service() for servlet [appServlet] in context with path [/ui] threw exception [Request processing failed; nested exception is org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: [com.epam.hhsystem.model.vacancy.Vacancy#6]] with root cause
    org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: [com.epam.hhsystem.model.vacancy.Vacancy#6]
        at org.hibernate.engine.internal.StatefulPersistenceContext.checkUniqueness(StatefulPersistenceContext.java:697)
        at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:296)
        at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:241)
        at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:109)
        at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
        at org.hibernate.internal.SessionImpl.fireSaveOrUpdate(SessionImpl.java:735)
        at org.hibernate.internal.SessionImpl.saveOrUpdate(SessionImpl.java:727)
        at org.hibernate.engine.spi.CascadingAction$5.cascade(CascadingAction.java:258)
        at org.hibernate.engine.internal.Cascade.cascadeToOne(Cascade.java:388)
        at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:331)
        at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:209)
        at org.hibernate.engine.internal.Cascade.cascadeCollectionElements(Cascade.java:418)
        at org.hibernate.engine.internal.Cascade.cascadeCollection(Cascade.java:358)
        at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:334)
        at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:209)
        at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:166)
        at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:132)
        at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.cascadeOnUpdate(DefaultSaveOrUpdateEventListener.java:364)
        at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:338)
        at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:241)
        at org.hibernate.event.internal.DefaultUpdateEventListener.performSaveOrUpdate(DefaultUpdateEventListener.java:55)
        at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
        at org.hibernate.internal.SessionImpl.fireUpdate(SessionImpl.java:786)
        at org.hibernate.internal.SessionImpl.update(SessionImpl.java:778)
        at org.hibernate.internal.SessionImpl.update(SessionImpl.java:774)
        at com.epam.hhsystem.jpa.EventDaoImpl.update(EventDaoImpl.java:45)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
        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.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
        at $Proxy38.update(Unknown Source)
        at com.epam.hhsystem.services.EventService.update(EventService.java:24)
        at com.epam.hhsystem.services.EventService$$FastClassByCGLIB$$3653e1b6.invoke(<generated>)
        at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:698)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
        at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:631)
        at com.epam.hhsystem.services.EventService$$EnhancerByCGLIB$$8266fd26.update(<generated>)
        at com.epam.hhsystem.web.controllers.EventMenuController.updateEvent(EventMenuController.java:164)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)
        at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
        at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
        at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)
        at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686)
        at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
        at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:838)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
        at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
        at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
        at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:183)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
        at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
        at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
        at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
        at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        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:947)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1009)
        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$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)
    
    I noticed, that I have no problem if I write change mapping Vacancy in Event:
    @ManyToMany(/*cascade = CascadeType.ALL,*/ fetch = FetchType.EAGER)// I comment cascade
        public Set<Vacancy> getVacancies() {
            return vacancies;
        }
    
    @ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
        public Set<Candidate> getCandidates() {
            return candidates;
        }
    
    @PersistenceContext
    EntityManager entityManager;
    
    ...
     public String updateEvent(Model model,
            @Valid @ModelAttribute("existedEvent") Event event,
            BindingResult result,
            @ModelAttribute("linkedCandidates") Set<Candidate> candidates,
            @ModelAttribute("linkedvacancies") Set<Vacancy> vacancies) {
    
        if (result.hasErrors())...
    
        ...
        List<Vacancie> mergedVacancies = new ArrayList<>();
            if (vacancies != null) {
            for(Vacancie v : vacancies) {
                 mergedVacancies.add(entityManager.merge(v));
            }
        }
    
    
        for (Vacancy vacancy : mergedVacancies ) {
             vacancy.getEvents().add(event);
        }
        ...
        //Attention: mergedVacancies is not null like in the original code
        event.setVacancies(mergedVacancies );
        ...
     }