1 Reply Latest reply on May 9, 2007 6:25 AM by Jason Qin

    Error about ListDataModel?

    Jason Qin Newbie

      In the message example,I add some code in MessageManager.java?MessageManagerBean.java and message.jsp like following.


      MessageManager.java

      //$Id: MessageManager.java,v 1.2 2006/05/23 05:30:24 gavin Exp $
      package org.jboss.seam.example.messages;
      
      import javax.ejb.Local;
      
      @Local
      public interface MessageManager
      {
       public String getTitle();
       public void setTitle(String title);
       public void findMessages();
       public void select();
       public void delete();
       public void destroy();
      }
      


      MessageManagerBean.java
      //$Id: MessageManagerBean.java,v 1.7 2006/11/19 21:01:33 gavin Exp $
      package org.jboss.seam.example.messages;
      
      import static javax.persistence.PersistenceContextType.EXTENDED;
      import static org.jboss.seam.ScopeType.SESSION;
      
      import java.io.Serializable;
      import java.util.List;
      
      import javax.ejb.Remove;
      import javax.ejb.Stateful;
      import javax.persistence.EntityManager;
      import javax.persistence.PersistenceContext;
      
      import org.jboss.seam.annotations.Destroy;
      import org.jboss.seam.annotations.Factory;
      import org.jboss.seam.annotations.Name;
      import org.jboss.seam.annotations.Out;
      import org.jboss.seam.annotations.Scope;
      import org.jboss.seam.annotations.datamodel.DataModel;
      import org.jboss.seam.annotations.datamodel.DataModelSelection;
      
      @Stateful
      @Scope(SESSION)
      @Name("messageManager")
      public class MessageManagerBean implements Serializable, MessageManager
      {
      
       private String title = "Test";
      
       @DataModel
       private List<Message> messageList;
      
       @DataModelSelection
       @Out(required=false)
       private Message message;
      
       @PersistenceContext(type=EXTENDED)
       private EntityManager em;
      
       @Factory("messageList")
       public void findMessages()
       {
       messageList = em.createQuery("select msg from Message msg order by msg.datetime desc").getResultList();
       }
      
       public String getTitle(){
       return title;
       }
      
       public void setTitle(String title){
       this.title = title;
       }
      
       public void select()
       {
       if (message!=null) message.setRead(true);
       }
      
       public void delete()
       {
       if (message!=null)
       {
       messageList.remove(message);
       em.remove(message);
       message=null;
       }
       }
      
       @Remove @Destroy
       public void destroy() {}
      
      }
      


      message.jsp
      <%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
      <%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
      <%@ taglib uri="http://jboss.com/products/seam/taglib" prefix="s" %>
      <html>
       <head>
       <title>Messages</title>
       </head>
       <body>
       <f:view>
       <h2>Message List</h2>
       <h:outputText value="messageManager.title" />
       <h:outputText value="No messages to display" rendered="#{messageList.rowCount==0}"/>
       <h:dataTable var="msg" value="#{messageList}" rendered="#{messageList.rowCount>0}">
       <h:column>
       <f:facet name="header">
       <h:outputText value="Read"/>
       </f:facet>
       <h:selectBooleanCheckbox value="#{msg.read}" disabled="true"/>
       </h:column>
       <h:column>
       <f:facet name="header">
       <h:outputText value="Title"/>
       </f:facet>
       <s:link value="#{msg.title}" action="#{messageManager.select}"/>
       </h:column>
       <h:column>
       <f:facet name="header">
       <h:outputText value="Date/Time"/>
       </f:facet>
       <h:outputText value="#{msg.datetime}">
       <s:convertDateTime type="both" dateStyle="medium" timeStyle="short"/>
       </h:outputText>
       </h:column>
       <h:column>
       <s:button value="Delete" action="#{messageManager.delete}"/>
       </h:column>
       </h:dataTable>
       <h3><h:outputText value="#{message.title}"/></h3>
       <div><h:outputText value="#{message.text}"/></div>
       </f:view>
       </body>
      </html>
      


      When I delete the last message of the message list,I get the error.
      18:16:55,984 ERROR [[jsp]] Servlet.service() for servlet jsp threw exception
      javax.faces.el.EvaluationException: Cannot get value for expression '#{messageManager.title}'
       at org.apache.myfaces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:402)
       at javax.faces.component.UIOutput.getValue(UIOutput.java:77)
       at org.apache.myfaces.shared_impl.renderkit.RendererUtils.getStringValue(RendererUtils.java:217)
       at org.apache.myfaces.shared_impl.renderkit.html.HtmlTextRendererBase.renderOutput(HtmlTextRendererBase.java:69)
       at org.apache.myfaces.shared_impl.renderkit.html.HtmlTextRendererBase.encodeEnd(HtmlTextRendererBase.java:57)
       at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:536)
       at javax.faces.webapp.UIComponentTag.encodeEnd(UIComponentTag.java:495)
       at javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:363)
       at org.apache.jsp.messages_jsp._jspx_meth_h_outputText_0(messages_jsp.java:172)
       at org.apache.jsp.messages_jsp._jspx_meth_f_view_0(messages_jsp.java:126)
       at org.apache.jsp.messages_jsp._jspService(messages_jsp.java:91)
       at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
       at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
       at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
       at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
       at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
       at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
       at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
       at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
       at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:416)
       at org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
       at org.jboss.seam.jsf.SeamViewHandler.renderView(SeamViewHandler.java:59)
       at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384)
       at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
       at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
       at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
       at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
       at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
       at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
       at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
       at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
       at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
       at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
       at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
       at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
       at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
       at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
       at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
       at java.lang.Thread.run(Thread.java:619)
      Caused by: javax.faces.el.EvaluationException: Exception getting value of property title of base of type : org.javassist.tmp.java.lang.Object_$$_javassist_1
       at org.apache.myfaces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java:96)
       at org.apache.myfaces.el.ELParserHelper$MyPropertySuffix.evaluate(ELParserHelper.java:532)
       at org.apache.commons.el.ComplexValue.evaluate(ComplexValue.java:145)
       at org.apache.myfaces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:383)
       ... 46 more
      Caused by: javax.faces.el.EvaluationException: Bean: org.javassist.tmp.java.lang.Object_$$_javassist_1, property: title
       at org.apache.myfaces.el.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:442)
       at org.apache.myfaces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java:82)
       ... 49 more
      Caused by: java.lang.reflect.InvocationTargetException
       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.apache.myfaces.el.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:438)
       ... 50 more
      Caused by: javax.ejb.EJBException: java.lang.IllegalArgumentException: row is unavailable
       at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:69)
       at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
       at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:197)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:83)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:78)
       at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:131)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.stateful.StatefulContainer.localInvoke(StatefulContainer.java:203)
       at org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:98)
       at $Proxy94.getTitle(Unknown Source)
       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.jboss.seam.util.Reflections.invoke(Reflections.java:20)
       at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
       at org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:72)
       at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:57)
       at org.jboss.seam.interceptors.RemoveInterceptor.aroundInvoke(RemoveInterceptor.java:40)
       at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
       at org.jboss.seam.interceptors.SynchronizationInterceptor.aroundInvoke(SynchronizationInterceptor.java:31)
       at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
       at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:103)
       at org.jboss.seam.intercept.ClientSideInterceptor.invoke(ClientSideInterceptor.java:50)
       at org.javassist.tmp.java.lang.Object_$$_javassist_1.getTitle(Object_$$_javassist_1.java)
       ... 55 more
      Caused by: java.lang.IllegalArgumentException: row is unavailable
       at javax.faces.model.ListDataModel.getRowData(ListDataModel.java:63)
       at org.jboss.seam.databinding.DataModelBinder.getSelection(DataModelBinder.java:69)
       at org.jboss.seam.databinding.DataModelBinder.getSelection(DataModelBinder.java:19)
       at org.jboss.seam.Component.injectDataModelSelection(Component.java:1274)
       at org.jboss.seam.Component.injectDataModelSelections(Component.java:1254)
       at org.jboss.seam.Component.inject(Component.java:1196)
       at org.jboss.seam.interceptors.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:46)
       at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
       at org.jboss.seam.interceptors.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:27)
       at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
       at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:103)
       at org.jboss.seam.intercept.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:53)
       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.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:118)
       at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.entity.ExtendedPersistenceContextPropagationInterceptor.invoke(ExtendedPersistenceContextPropagationInterceptor.java:71)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
       at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
       ... 86 more
      


      But WhenI delete other message,it's normal. Why?[/url]

        • 1. Re: Error about ListDataModel?
          Jason Qin Newbie

           

          "jasonqzy" wrote:
          In the message example,I modify MessageManager.java MessageManagerBean.java message.jsp like following.


          MessageManager.java
          //$Id: MessageManager.java,v 1.2 2006/05/23 05:30:24 gavin Exp $
          package org.jboss.seam.example.messages;
          
          import javax.ejb.Local;
          
          @Local
          public interface MessageManager
          {
           public String getTitle();
           public void setTitle(String title);
           public void findMessages();
           public void select();
           public void delete();
           public void destroy();
          }
          


          MessageManagerBean.java
          //$Id: MessageManagerBean.java,v 1.7 2006/11/19 21:01:33 gavin Exp $
          package org.jboss.seam.example.messages;
          
          import static javax.persistence.PersistenceContextType.EXTENDED;
          import static org.jboss.seam.ScopeType.SESSION;
          
          import java.io.Serializable;
          import java.util.List;
          
          import javax.ejb.Remove;
          import javax.ejb.Stateful;
          import javax.persistence.EntityManager;
          import javax.persistence.PersistenceContext;
          
          import org.jboss.seam.annotations.Destroy;
          import org.jboss.seam.annotations.Factory;
          import org.jboss.seam.annotations.Name;
          import org.jboss.seam.annotations.Out;
          import org.jboss.seam.annotations.Scope;
          import org.jboss.seam.annotations.datamodel.DataModel;
          import org.jboss.seam.annotations.datamodel.DataModelSelection;
          
          @Stateful
          @Scope(SESSION)
          @Name("messageManager")
          public class MessageManagerBean implements Serializable, MessageManager
          {
          
           private String title = "Test";
          
           @DataModel
           private List<Message> messageList;
          
           @DataModelSelection
           @Out(required=false)
           private Message message;
          
           @PersistenceContext(type=EXTENDED)
           private EntityManager em;
          
           @Factory("messageList")
           public void findMessages()
           {
           messageList = em.createQuery("select msg from Message msg order by msg.datetime desc").getResultList();
           }
          
           public String getTitle(){
           return title;
           }
          
           public void setTitle(String title){
           this.title = title;
           }
          
           public void select()
           {
           if (message!=null) message.setRead(true);
           }
          
           public void delete()
           {
           if (message!=null)
           {
           messageList.remove(message);
           em.remove(message);
           message=null;
           }
           }
          
           @Remove @Destroy
           public void destroy() {}
          
          }
          


          message.jsp
          
          <%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
          <%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
          <%@ taglib uri="http://jboss.com/products/seam/taglib" prefix="s" %>
          <html>
           <head>
           <title>Messages</title>
           </head>
           <body>
           <f:view>
           <h2>Message List</h2>
           <h:outputText value="messageManager.title" />
           <h:outputText value="No messages to display" rendered="#{messageList.rowCount==0}"/>
           <h:dataTable var="msg" value="#{messageList}" rendered="#{messageList.rowCount>0}">
           <h:column>
           <f:facet name="header">
           <h:outputText value="Read"/>
           </f:facet>
           <h:selectBooleanCheckbox value="#{msg.read}" disabled="true"/>
           </h:column>
           <h:column>
           <f:facet name="header">
           <h:outputText value="Title"/>
           </f:facet>
           <s:link value="#{msg.title}" action="#{messageManager.select}"/>
           </h:column>
           <h:column>
           <f:facet name="header">
           <h:outputText value="Date/Time"/>
           </f:facet>
           <h:outputText value="#{msg.datetime}">
           <s:convertDateTime type="both" dateStyle="medium" timeStyle="short"/>
           </h:outputText>
           </h:column>
           <h:column>
           <s:button value="Delete" action="#{messageManager.delete}"/>
           </h:column>
           </h:dataTable>
           <h3><h:outputText value="#{message.title}"/></h3>
           <div><h:outputText value="#{message.text}"/></div>
           </f:view>
           </body>
          </html>
          


          When I delete the last message of the message list,I get the error.
          18:16:55,984 ERROR [[jsp]] Servlet.service() for servlet jsp threw exception
          javax.faces.el.EvaluationException: Cannot get value for expression '#{messageManager.title}'
           at org.apache.myfaces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:402)
           at javax.faces.component.UIOutput.getValue(UIOutput.java:77)
           at org.apache.myfaces.shared_impl.renderkit.RendererUtils.getStringValue(RendererUtils.java:217)
           at org.apache.myfaces.shared_impl.renderkit.html.HtmlTextRendererBase.renderOutput(HtmlTextRendererBase.java:69)
           at org.apache.myfaces.shared_impl.renderkit.html.HtmlTextRendererBase.encodeEnd(HtmlTextRendererBase.java:57)
           at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:536)
           at javax.faces.webapp.UIComponentTag.encodeEnd(UIComponentTag.java:495)
           at javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:363)
           at org.apache.jsp.messages_jsp._jspx_meth_h_outputText_0(messages_jsp.java:172)
           at org.apache.jsp.messages_jsp._jspx_meth_f_view_0(messages_jsp.java:126)
           at org.apache.jsp.messages_jsp._jspService(messages_jsp.java:91)
           at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
           at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
           at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
           at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
           at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
           at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
           at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
           at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
           at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
           at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
           at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
           at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
           at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:416)
           at org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
           at org.jboss.seam.jsf.SeamViewHandler.renderView(SeamViewHandler.java:59)
           at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384)
           at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138)
           at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
           at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
           at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
           at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
           at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
           at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
           at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
           at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
           at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
           at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
           at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
           at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
           at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
           at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
           at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
           at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
           at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
           at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
           at java.lang.Thread.run(Thread.java:619)
          Caused by: javax.faces.el.EvaluationException: Exception getting value of property title of base of type : org.javassist.tmp.java.lang.Object_$$_javassist_1
           at org.apache.myfaces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java:96)
           at org.apache.myfaces.el.ELParserHelper$MyPropertySuffix.evaluate(ELParserHelper.java:532)
           at org.apache.commons.el.ComplexValue.evaluate(ComplexValue.java:145)
           at org.apache.myfaces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:383)
           ... 46 more
          Caused by: javax.faces.el.EvaluationException: Bean: org.javassist.tmp.java.lang.Object_$$_javassist_1, property: title
           at org.apache.myfaces.el.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:442)
           at org.apache.myfaces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java:82)
           ... 49 more
          Caused by: java.lang.reflect.InvocationTargetException
           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.apache.myfaces.el.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:438)
           ... 50 more
          Caused by: javax.ejb.EJBException: java.lang.IllegalArgumentException: row is unavailable
           at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:69)
           at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
           at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:197)
           at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
           at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
           at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
           at org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:83)
           at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
           at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:78)
           at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:131)
           at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
           at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47)
           at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
           at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
           at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
           at org.jboss.ejb3.stateful.StatefulContainer.localInvoke(StatefulContainer.java:203)
           at org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:98)
           at $Proxy94.getTitle(Unknown Source)
           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.jboss.seam.util.Reflections.invoke(Reflections.java:20)
           at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
           at org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:72)
           at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:57)
           at org.jboss.seam.interceptors.RemoveInterceptor.aroundInvoke(RemoveInterceptor.java:40)
           at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
           at org.jboss.seam.interceptors.SynchronizationInterceptor.aroundInvoke(SynchronizationInterceptor.java:31)
           at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
           at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:103)
           at org.jboss.seam.intercept.ClientSideInterceptor.invoke(ClientSideInterceptor.java:50)
           at org.javassist.tmp.java.lang.Object_$$_javassist_1.getTitle(Object_$$_javassist_1.java)
           ... 55 more
          Caused by: java.lang.IllegalArgumentException: row is unavailable
           at javax.faces.model.ListDataModel.getRowData(ListDataModel.java:63)
           at org.jboss.seam.databinding.DataModelBinder.getSelection(DataModelBinder.java:69)
           at org.jboss.seam.databinding.DataModelBinder.getSelection(DataModelBinder.java:19)
           at org.jboss.seam.Component.injectDataModelSelection(Component.java:1274)
           at org.jboss.seam.Component.injectDataModelSelections(Component.java:1254)
           at org.jboss.seam.Component.inject(Component.java:1196)
           at org.jboss.seam.interceptors.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:46)
           at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
           at org.jboss.seam.interceptors.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:27)
           at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
           at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:103)
           at org.jboss.seam.intercept.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:53)
           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.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:118)
           at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
           at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
           at org.jboss.ejb3.entity.ExtendedPersistenceContextPropagationInterceptor.invoke(ExtendedPersistenceContextPropagationInterceptor.java:71)
           at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
           at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
           at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
           at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
           at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
           at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
           ... 86 more
          


          But WhenI delete other message,it's normal. Why?[/url]