Por que dá essa exception NonUniqueObjectException?

Front-end
#1

Alguém saberia me dizer o que é e porque dá essa exceção quando eu tento atualizar um objeto no Hibernate?

public void update(Object object) throws Throwable { session.beginTransaction(); session.update(object); // org.trans.dao.GenericDAO.update(GenericDAO.java:43) session.getTransaction().commit(); }

org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: [org.trans.pojo.Usuario#10] at org.hibernate.engine.StatefulPersistenceContext.checkUniqueness(StatefulPersistenceContext.java:590) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:284) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:223) at org.hibernate.event.def.DefaultUpdateEventListener.performSaveOrUpdate(DefaultUpdateEventListener.java:33) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70) at org.hibernate.impl.SessionImpl.fireUpdate(SessionImpl.java:564) at org.hibernate.impl.SessionImpl.update(SessionImpl.java:552) at org.hibernate.impl.SessionImpl.update(SessionImpl.java:544) 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.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:301) at $Proxy26.update(Unknown Source) at org.trans.dao.GenericDAO.update(GenericDAO.java:43) at org.trans.bean.UsuarioDataTableScrollerBean.salvar(UsuarioDataTableScrollerBean.java:130) 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 com.sun.el.parser.AstValue.invoke(AstValue.java:187) at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297) at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68) at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:88) at javax.faces.event.ActionEvent.processListener(ActionEvent.java:77) at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:746) at javax.faces.component.UICommand.broadcast(UICommand.java:368) at org.ajax4jsf.component.AjaxActionComponent.broadcast(AjaxActionComponent.java:55) at org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:321) at org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:296) at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:253) at org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:466) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97) at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244) at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:427) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:333) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178) at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290) at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:390) at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:517) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) at org.trans.filtro.FiltroLogado.doFilter(FiltroLogado.java:115) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) at org.trans.filtro.SessionTimeoutFilter.doFilter(SessionTimeoutFilter.java:58) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:313) at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:287) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:218) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593) at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94) at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:98) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:222) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1096) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:166) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1096) at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:288) at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:647) at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:579) at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:831) at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341) at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:263) at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:214) at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265) at com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106)
Obrigado

#2

Existem dois objetos com o mesmo id na session do hibernate.
Muito provavelmente você deve ter instanciado um novo objeto com os mesmos dados de um objeto carregado na session do hibernate.

Você pode dar um flush ou um clear na session para limpar o objeto inicialmente armazenado na session.

#3

Posso sim…

Vc deve estar tentando atualizar um objeto, sem obte-lo primeiro do banco de dados…

O hibernate assume que aquela é uma nova entidade, e não que é um registro já existente no banco de dados.

Chame o método merge antes do update() ou consulte a entidade primeiro e depois chame o save.

Todas essas operações devem ser realizadas dentro da mesma sessão, não adianta vc consultar uma entidade em uma sessão, e tentar gravar em outra sessão.

O fluxo normal em uma aplicação web é:

Abrir a sessão
Abrir a transação
Consultar a Entidade
Fechar a transação
Fechar a sessão

Alterar suas propriedades
Abrir a sessão
Abrir a transação
merge()
saveOrUpdate()
fechar a transação
fechar a sessão

#4

Resolvi assim:

public void update(Object object) throws Throwable { session = HibernateUtil.getSessionFactory().openSession(); Transaction transaction = session.beginTransaction(); /* session.merge(object); session.flush(); session.clear(); session.update(object); session.getTransaction().commit(); session.close(); */ try { transaction.begin(); session.merge(object); transaction.commit(); } catch (Exception e) { transaction.rollback(); e.printStackTrace(); throw new Exception(e); } finally { session.close(); } }

Agora não entendi isso, afinal pra que serve o session.update(…)?

#5

Na verdade falei cedo demais, até chegou a atualizar o objeto mas agora começou a dar essa outra exception:

// Salvar/atualizar usuario public void salvar(ActionEvent event) { boolean senhasOk = usuarioSelecionado.getSenha().toLowerCase().equals(this.senhaConfirmar.toLowerCase()); if (senhasOk) { try { if (usuarioSelecionado.getId() > 0) { usuarioDao.update(usuarioSelecionado); } else { usuarioDao.save(usuarioSelecionado); } usuarioDao.load(); this.senhaConfirmar = ""; } catch (Throwable ex) { Logger.getLogger(UsuarioDataTableScrollerBean.class.getName()).log(Level.SEVERE, null, ex); } } else { // Retornar alguma coisa para a chamada Ajax } }

public void update(Object object) throws Throwable { session = HibernateUtil.getSessionFactory().openSession(); Transaction transaction = session.beginTransaction(); try { transaction.begin(); session.merge(object); //session.flush(); //session.clear(); //session.update(object); transaction.commit(); } catch (Exception e) { transaction.rollback(); e.printStackTrace(); throw new Exception(e); } finally { session.close(); } }

Exception:

Hibernate: /* update org.trans.pojo.Usuario */ update transport.usuario set login=?, senha=?, nome_real=?, email=?, nivel=? where id=? org.hibernate.exception.GenericJDBCException: could not update: [org.trans.pojo.Usuario#4] at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103) at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2425) at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2307) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2607) at org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:92) at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:234) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:142) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000) at org.trans.dao.GenericDAO.update(GenericDAO.java:56) at org.trans.bean.UsuarioDataTableScrollerBean.salvar(UsuarioDataTableScrollerBean.java:130) 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 com.sun.el.parser.AstValue.invoke(AstValue.java:187) at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297) at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68) at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:88) at javax.faces.event.ActionEvent.processListener(ActionEvent.java:77) at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:746) at javax.faces.component.UICommand.broadcast(UICommand.java:368) at org.ajax4jsf.component.AjaxActionComponent.broadcast(AjaxActionComponent.java:55) at org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:321) at org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:296) at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:253) at org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:466) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97) at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244) at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:427) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:333) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178) at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290) at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:390) at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:517) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) at org.trans.filtro.FiltroLogado.doFilter(FiltroLogado.java:115) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) at org.trans.filtro.SessionTimeoutFilter.doFilter(SessionTimeoutFilter.java:58) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:313) at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:287) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:218) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593) at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94) at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:98) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:222) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1096) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:166) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1096) at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:288) at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:647) at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:579) at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:831) at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341) at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:263) at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:214) at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265) at com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106) Caused by: java.sql.SQLException: Lock wait timeout exceeded; try restarting transaction at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3491) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3423) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1936) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2060) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2542) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1734) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2019) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1937) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1922) at org.hibernate.jdbc.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:23) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2403) ... 75 more

#6

É novamente o mesmo erro…

Caused by: java.sql.SQLException: Lock wait timeout exceeded; try restarting transaction

Oq seu programa está fazendo antes de chegar a este ponto? Tem alguma coisa já acessando a tabela no banco de dados sem fechar a transação/conexão.

Post o método load, por favor…

André

#7

Sim, uma única coisa, um select listando os usuários, agora parece que está tudo certo.

Ordem de execução:

  • Primeiro:

public List<Usuario> listaUsuariosPorNome() { session = HibernateUtil.getSessionFactory().openSession(); List<Usuario> lista = null; try { lista = session.createCriteria(Usuario.class).addOrder(Order.asc("nomeReal")).list(); } catch (HibernateException e) { } finally { session.close(); } return lista; }

  • Segundo (onde dava o erro):

public void update(Object object) throws Throwable { session = HibernateUtil.getSessionFactory().openSession(); Transaction transaction = session.beginTransaction(); try { transaction.begin(); session.merge(object); //session.flush(); //session.clear(); //session.update(object); transaction.commit(); } catch (HibernateException e) { transaction.rollback(); e.printStackTrace(); throw new HibernateException(e); } finally { session.close(); } }

Saberia me dizer porque tenho que usar o merge ao invés de usar o update?

Outra coisa, tenho sempre que fechar a sessão depois de qualquer operação no hibernate?

#8

transient: never persistent, not associated with any Session
persistent: associated with a unique Session
detached: previously persistent, not associated with any Session

Transient instances may be made persistent by calling save(), persist() or saveOrUpdate(). Persistent instances may be made transient by calling delete(). Any instance returned by a get() or load() method is persistent. Detached instances may be made persistent by calling update(), saveOrUpdate(), lock() or replicate(). The state of a transient or detached instance may also be made persistent as a new persistent instance by calling merge().

Pelo que deu para entender nesses paragrafos a diferença está basicamente no estado da entidade.

Não necessariamente, mas é a abordagem mais utilizada. A Session do hibernate funciona como um cache primário, então tudo o que é consultado e alterado na mesma sessão fica em cache. Então mesmo que vc não feche a sessão sempre, vc vai ter q no mínimo chamar:

session.flush();
session.clear()

De vez em quando. Porém a própria documentação do Hibernate diz que o custo de criação de uma Session é muito pequeno.

#9

Esse tipo de controle transacional que vc está fazendo é o mais chato. Vc poderia utilizar algo cmo Open Session in View (https://www.hibernate.org/43.html) ou algum framework de AOP, Spring por exemplo, para fazer esse controle.

#10