[richfaces-issues] [JBoss JIRA] (RF-11985) rich:dataTable with MyFaces 2.x.x - Target Unreachable, identifier 'client' resolved to null

Brian Leathem (JIRA) jira-events at lists.jboss.org
Fri Feb 24 15:34:36 EST 2012 

    [ https://issues.jboss.org/browse/RF-11985?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12670974#comment-12670974 ] 

Brian Leathem commented on RF-11985:
------------------------------------

Jean ANDRE,

I would first like to thank you for the time you spend submitting these bug reports to help improve the project as a whole.  However, I would like to put the onus on you to help us identify the specifics of a problem, before you file an issue.

A simple approach to take, is to make a copy of your application, and start trimming away features and libraries to isolate the problem involved.  You know your application far better than we, and are in a much better position to start paring the cruft away.

Once you have the simplest possible scenario (both in terms of features, and required libraries) that demonstrates the problem, then submit it to us in an issue report.

The Richfaces project is not alone in asking for such [Short, Self Contained, Correct|http://sscce.org/] (and I'll add Runnable!) Examples.  Such an effort on your part can only serve to streamline the resolution of the underlying problem.
                
> rich:dataTable with MyFaces 2.x.x - Target Unreachable, identifier 'client' resolved to null
> --------------------------------------------------------------------------------------------
>
>                 Key: RF-11985
>                 URL: https://issues.jboss.org/browse/RF-11985
>             Project: RichFaces
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 4.2.0.CR1
>         Environment: MyFaces 2.0.x and 2.1.6 - RichFaces 4.2.0 CR1 - WAS 8.0.0.1 - Spring 3.0.6 - Hibernate Validator 4.2.0 Final
>            Reporter: Jean ANDRE
>            Priority: Critical
>         Attachments: index.xhtml, listClient.xhtml, ResultClientController.java, searchClient.xhtml, SearchClientController.java, tabsClient.xhtml, TabsClientController.java
>
>
> We made a test under MyFaces implementation of JSF 2.0 and actually we got an error with the dataTable. At the first call of the web page, the dataTable performs well but once the dataTable is redisplayed, the dataTable is unable to reach an existing variable declared by the attribute var (ex.var="client").
> We made also the test by using the h:dataTable, the standard JSF tag and it is working perfectly - As you know we also use Mojarra as JSF implementation and it's working too. Then the problem seems to come from with rich:dataTable. Nothing very special here in using the tag.
> {code}
> 		<rich:dataTable id="resultListClient" var="client" value="#{tab.searchResult.data}" rendered="#{not tab.searchResult.isEmpty}" row="30" rowClasses="odd-row, even-row">
> 			<rich:column id="dejaVu" rendered="#{not resultClientController.isEmptyDejaVu()}">
> 				<!--            -->
> 				<!--  DEJA VU   -->
> 				<!--            -->
> 				<f:facet name="header">
> 					&#160;
> 				</f:facet>
> 				<h:graphicImage value="/images/checked.png"
> 							 rendered="#{resultClientController.isDejaVu(client.id)}"
> 							 alt="#{msg['common.dejaVu.alt']}"
> 							 title="#{msg['common.dejaVu.tooltip']}" />
> 			</rich:column>
> {code}
> {code}
>                                 javax.faces.FacesException: javax.el.PropertyNotFoundException: /pages/client/listClient.xhtml at line 78 and column 51 rendered="#{resultClientController.isDejaVu(client.id)}": Target Unreachable, identifier 'client' resolved to null
> 	at org.apache.myfaces.shared_impl.context.ExceptionHandlerImpl.wrap(ExceptionHandlerImpl.java:241)
> 	at org.apache.myfaces.shared_impl.context.ExceptionHandlerImpl.handle(ExceptionHandlerImpl.java:156)
> 	at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:191)
> 	at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
> 	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:189)
> 	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1147)
> 	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:722)
> 	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:449)
> 	at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:178)
> 	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.invokeTarget(WebAppFilterChain.java:125)
> 	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:92)
> 	at com.intact.crm.web.filter.LoginFilter.doFilter(LoginFilter.java:56)
> 	at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:192)
> 	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:89)
> 	at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:919)
> 	at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1016)
> 	at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:87)
> 	at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:886)
> 	at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1655)
> 	at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:195)
> 	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:452)
> 	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:511)
> 	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:305)
> 	at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:83)
> 	at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
> 	at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
> 	at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
> 	at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
> 	at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
> 	at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
> 	at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
> 	at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1650)
> Caused by: javax.el.PropertyNotFoundException: /pages/client/listClient.xhtml at line 78 and column 51 rendered="#{resultClientController.isDejaVu(client.id)}": Target Unreachable, identifier 'client' resolved to null
> 	at org.apache.myfaces.view.facelets.el.TagValueExpression.getValue(TagValueExpression.java:89)
> 	at javax.faces.component._DeltaStateHelper.eval(_DeltaStateHelper.java:260)
> 	at javax.faces.component.UIComponentBase.isRendered(UIComponentBase.java:1007)
> 	at javax.faces.component.UIComponent.isVisitable(UIComponent.java:289)
> 	at javax.faces.component.UIComponent.visitTree(UIComponent.java:767)
> 	at javax.faces.component.UIComponentBase.visitTree(UIComponentBase.java:991)
> 	at javax.faces.component.UIComponent.visitTree(UIComponent.java:793)
> 	at javax.faces.component.UIComponentBase.visitTree(UIComponentBase.java:991)
> 	at org.richfaces.component.UIDataAdaptor.visitComponents(UIDataAdaptor.java:1259)
> 	at org.richfaces.component.UIDataAdaptor.visitDataChildren(UIDataAdaptor.java:1286)
> 	at org.richfaces.component.UIDataTableBase.visitDataChildren(UIDataTableBase.java:359)
> 	at org.richfaces.component.UIDataAdaptor.visitTree(UIDataAdaptor.java:1360)
> 	at javax.faces.component.UIComponent.visitTree(UIComponent.java:793)
> 	at javax.faces.component.UIComponentBase.visitTree(UIComponentBase.java:991)
> 	at javax.faces.component.UINamingContainer.visitTree(UINamingContainer.java:169)
> 	at javax.faces.component.UIComponent.visitTree(UIComponent.java:793)
> 	at javax.faces.component.UIComponentBase.visitTree(UIComponentBase.java:991)
> 	at org.richfaces.component.AbstractTogglePanel.visitTree(AbstractTogglePanel.java:719)
> 	at javax.faces.component.UIForm.visitTree(UIForm.java:269)
> 	at javax.faces.component.UIComponent.visitTree(UIComponent.java:793)
> 	at javax.faces.component.UIComponentBase.visitTree(UIComponentBase.java:991)
> 	at javax.faces.component.UIComponent.visitTree(UIComponent.java:793)
> 	at javax.faces.component.UIComponentBase.visitTree(UIComponentBase.java:991)
> 	at org.apache.myfaces.view.facelets.tag.ui.DebugPhaseListener._doTreeVisit(DebugPhaseListener.java:310)
> 	at org.apache.myfaces.view.facelets.tag.ui.DebugPhaseListener.afterPhase(DebugPhaseListener.java:286)
> 	at org.apache.myfaces.lifecycle.PhaseListenerManager.informPhaseListenersAfter(PhaseListenerManager.java:111)
> 	at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:185)
> 	... 29 more
> {code}
> Please, not that the application is a single page application, everything appends inside a single page. Dynamic include is used to achieve this goal (see index.xhtml) - Tab is also dynamic except for the search. See screen shot.

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