[jboss-user] [JBoss Seam] - s:selectItems + a4j:support = NullPointerException

saeediqbal1 do-not-reply at jboss.com
Mon Feb 11 01:12:00 EST 2008


I get a nullpointerexception when i move the select box back to the item that is "noSelectionLabel". When I select a valid entry inside the drop down, it works OK. But when we go back to resetting it by selecting the noSelectionLabel, it pops the following error.

Is this a bug? 


  | <h:selectOneMenu id="actionSelected1" value="#{voiceMenus.actionSelected1}" >
  | 		<a4j:support event="onchange" actionListener="#{voiceMenus.onDropdown1Change}" reRender="drop0" 
  | 		limitToList="true" ignoreDupResponses="true" ajaxSingle="true" />
  | 		<s:selectItems var="s_items0" value="#{voiceMenus.action}" noSelectionLabel="[Select Step]" />
  | 		</h:selectOneMenu>
  | 
  | 		<a4j:outputPanel  id="drop0" >			
  | 				<h:inputText value="#{voiceMenus.inputcustom1}" rendered="#{voiceMenus.iscustom1}"/>		
  | 		</a4j:outputPanel>


stack trace is as follows

javax.servlet.ServletException: /VoiceMenus.xhtml @177,68 actionListener="#{voiceMenus.onDropdown1Change}": javax.ejb.EJBTransactionRolledbackException
  | 	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:256)
  | 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
  | 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  | 	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
  | 	at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:68)
  | 	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  | 	at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
  | 	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  | 	at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
  | 	at org.j
  | 
  | 
  | 
  | Caused by: javax.faces.el.EvaluationException: /VoiceMenus.xhtml @177,68 actionListener="#{voiceMenus.onDropdown1Change}": javax.ejb.EJBTransactionRolledbackException
  | 	at com.sun.facelets.el.LegacyMethodBinding.invoke(LegacyMethodBinding.java:73)
  | 	at javax.faces.component.UICommand.broadcast(UICommand.java:376)
  | 	at org.ajax4jsf.component.AjaxActionComponent.broadcast(AjaxActionComponent.java:61)
  | 	at org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:184)
  | 	at org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:162)
  | 	at org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:350)
  | 	at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97)
  | 	at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
  | 	at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
  | 	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
  | 	... 37 more
  | Caused by: javax.ejb.EJBTransactionRolledbackException
  | 	at org.jboss.ejb3.tx.Ejb3TxPolicy.handleInCallerTx(Ejb3TxPolicy.java:87)
  | 	at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:130)
  | 	at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:195)
  | 
  | 
  | 
  | 
  | Caused by: java.lang.NullPointerException
  | 	at com.iphonica.iattendant.portal.VoiceMenusBean.onDropdown1Change(VoiceMenusBean.java:787)
  | 	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:585)
  | 	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
  | 	at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
  | 	at org.jboss.seam.intercept.EJBInvocationContext.proceed(EJBInvocationContext.java:44)
  | 	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
  | 	at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:31)
  | 	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  | 	at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:46)
  | 	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  | 	at org.jboss.seam.core.ConversationInterceptor.aroundInvoke(ConversationInterceptor.java:65)
  | 	at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  | 

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