Target Unreachable when saving the data back

[jasti_jenny]

Hi All,

I need some help with seam storing the data. I have written a bean class here is the code

   @Out @In(required=false)
   private GwpsProofWorkflow ccList;   

   public void authorList()
   {
        log.info("hellooooooo"+proof);     
        ccListSelected = new ArrayList();
        GwpsProofWorkflow proofWorkflow = (GwpsProofWorkflow)entityManager.createQuery("FROM GwpsProofWorkflow gwps where gwps.gwpsProof.proofId=:proof_id" +
                 " and reviewOrder=:reviewOrder")
                           .setParameter("proof_id", proof)
                           .setParameter("reviewOrder", reviewOrder)
                     .getSingleResult();
       
       ccList = proofWorkflow;
   }   

and my xhtml looks like this

  <h:form id="authorListForm" styleClass="edit"> 
 <rich:panel>
        <f:facet name="header">Email Details</f:facet>
        
        <s:decorate id="toAddress" template="layout/display.xhtml">
            <ui:define name="label">To</ui:define>
            <h:outputText value="#{ccList.gwpsEmailLog.toAddress}"/>
        </s:decorate>
      
        <s:decorate id="subject" template="layout/display.xhtml">
            <ui:define name="label">Subject</ui:define>
            <h:inputText id="sub"
                   required="true"
                    value="#{ccList.gwpsEmailLog.emailSubject}"
                     size="20">              
           </h:inputText>            
        </s:decorate>

        <s:decorate id="emailBody" template="layout/display.xhtml">
            <ui:define name="label">Email Body</ui:define>
            <h:inputText id="body"
                   required="true"
                    value="#{ccList.gwpsEmailLog.emailBody}"
                     size="20">              
           </h:inputText>  
            <h:outputText value="#{ccList.gwpsEmailLog.emailBody}"/>
        </s:decorate>

        <div style="clear:both"/>

    </rich:panel>

    <div class="actionButtons">

        <h:commandButton id="saveCC" value="Save Data"
                             action="#{AuthorList.saveCcList}"/>

        <s:button view="/#{empty gwpsPrivilegeFrom ? 'GwpsPrivilegeList' : gwpsPrivilegeFrom}.xhtml"
                    id="done"
                 value="Done"/>

    </div>
     </h:form>

I could display the data perfectly fine but when I hit the save data it says target unreachable, I know its a simple error, but I couldn't figure it out. I am a newbie. Help me out.

Thanks.

[jasti_jenny]

Here is the Error I Get

javax.servlet.ServletException: /authorList.xhtml @26,32 value="#{ccList.gwpsEmailLog.emailSubject}": Target Unreachable, identifier 'ccList' resolved to null
     javax.faces.webapp.FacesServlet.service(FacesServlet.java:277)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
     org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
     org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
     org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:390)
     org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:517)
     org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:60)
     org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
     org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

root cause

javax.el.PropertyNotFoundException: /authorList.xhtml @26,32 value="#{ccList.gwpsEmailLog.emailSubject}": Target Unreachable, identifier 'ccList' resolved to null
     com.sun.facelets.el.TagValueExpression.getType(TagValueExpression.java:62)
     com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getConvertedValue(HtmlBasicInputRenderer.java:92)
     javax.faces.component.UIInput.getConvertedValue(UIInput.java:942)
     javax.faces.component.UIInput.validate(UIInput.java:868)

[trunikov.dmitry.trunikov.zoral.com.ua]

Try following declaration:

@Out @In(required=false, create=true)
   private GwpsProofWorkflow ccList;

[jasti_jenny]

Thank you I tried adding it and couldn't get now I get a swallowing Exception. I tried to follow this forum link

http://seamframework.org/Community/PleaseHelpInAttributeRequiresNonnullValue

Here is the code changed

 private GwpsProofWorkflow gwpsProofWorkflow = new GwpsProofWorkflow();   

   public void authorList()
   {
        log.info("hellooooooo"+proof);     
        ccListSelected = new ArrayList();
        GwpsProofWorkflow proofWorkflow = (GwpsProofWorkflow)entityManager.createQuery("FROM GwpsProofWorkflow gwps where gwps.gwpsProof.proofId=:proof_id" +
                 " and reviewOrder=:reviewOrder")
                           .setParameter("proof_id", proof)
                           .setParameter("reviewOrder", reviewOrder)
                     .getSingleResult();
       
        gwpsProofWorkflow = proofWorkflow;
   }   
      public void saveCcList()
   {
        //log.info("hellooooooo"+ccListSelected.size());
        log.info(gwpsProofWorkflow.getCurrentTaskYn());
        gwpsProofWorkflow = entityManager.merge(gwpsProofWorkflow);
        entityManager.persist(gwpsProofWorkflow.getGwpsEmailLog());
          
      
   }

    @Out
     public GwpsProofWorkflow getGwpsProofWorkflow() {
          return gwpsProofWorkflow;
     }

     @In(required=false, create=true)
     public void setGwpsProofWorkflow(GwpsProofWorkflow gwpsProofWorkflow) {
          this.gwpsProofWorkflow = gwpsProofWorkflow;
     }

Here is my xhtml

<rich:panel>
        <f:facet name="header">Email Details</f:facet>
        
        <s:decorate id="toAddress" template="layout/edit.xhtml">
            <ui:define name="label">To</ui:define>
            <h:outputText value="#{gwpsProofWorkflow.gwpsEmailLog.toAddress}"/>
        </s:decorate>
      
        <s:decorate id="subject" template="layout/edit.xhtml">
            <ui:define name="label">Subject</ui:define>
            <h:inputText id="currentTaskYn"
                   required="true"
                    value="#{gwpsProofWorkflow.currentTaskYn}"
                     size="20">              
           </h:inputText>            
        </s:decorate>

        <s:decorate id="emailBody" template="layout/edit.xhtml">
            <ui:define name="label">Email Body</ui:define>
            <h:inputText id="emailBody"
                   required="true"
                    value="#{gwpsProofWorkflow.gwpsEmailLog.emailBody}"
                     size="20">              
           </h:inputText>  
            <h:outputText value="#{gwpsProofWorkflow.gwpsEmailLog.emailBody}"/>
        </s:decorate>
        <div style="clear:both"/>
    </rich:panel>

    <div class="actionButtons">

        <s:button id="saveCC" value="Save Data"
                             action="#{authorList.saveCcList}">
                   <f:param name="proof" value="#{gwpsProofWorkflow.gwpsProof.proofId}" />   
                   <f:param name="reviewOrder" value="#{gwpsProofWorkflow.reviewOrder}" />      
        </s:button>
    </div>
     </h:form>

Now I get the fowllowing Exception, I get the variable as null

11:19:12,143 ERROR [SeamPhaseListener] swallowing exception
javax.el.ELException: javax.ejb.EJBTransactionRolledbackException
     at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:339)
     at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:348)
     at org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
     at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
     at org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
     at org.jboss.seam.core.Expressions$2.invoke(Expressions.java:175)
     at org.jboss.seam.navigation.Pages.callAction(Pages.java:692)
     at org.jboss.seam.navigation.Pages.preRender(Pages.java:330)
     at org.jboss.seam.jsf.SeamPhaseListener.preRenderPage(SeamPhaseListener.java:561)
     at org.jboss.seam.jsf.SeamPhaseListener.beforeRenderResponse(SeamPhaseListener.java:472)
     at org.jboss.seam.jsf.SeamPhaseListener.beforeServletPhase(SeamPhaseListener.java:148)
     at org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:118)
     at com.sun.faces.lifecycle.Phase.handleBeforePhase(Phase.java:214)
     at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:96)
     at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
     at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     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.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:60)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
     at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432)
     at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
     at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
     at java.lang.Thread.run(Thread.java:595)
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)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
     at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:95)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
     at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
     at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
     at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:110)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
     at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
     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.stateless.StatelessContainer.localInvoke(StatelessContainer.java:240)
     at org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessContainer.java:210)
     at org.jboss.ejb3.stateless.StatelessLocalProxy.invoke(StatelessLocalProxy.java:84)
     at $Proxy130.saveCcList(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:585)
     at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
     at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:32)
     at org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:76)
     at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
     at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
     at org.jboss.seam.intercept.ClientSideInterceptor.invoke(ClientSideInterceptor.java:54)
     at org.javassist.tmp.java.lang.Object_$$_javassist_seam_2.saveCcList(Object_$$_javassist_seam_2.java)
     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.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:335)
     ... 54 more
Caused by: java.lang.NullPointerException
     at com.cadmus.gwps.action.AuthorListBean.saveCcList(AuthorListBean.java:84)
     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:28)
     at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
     at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:77)
     at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
     at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
     at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
     at org.jboss.seam.persistence.EntityManagerProxyInterceptor.aroundInvoke(EntityManagerProxyInterceptor.java:29)
     at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
     at org.jboss.seam.persistence.HibernateSessionProxyInterceptor.aroundInvoke(HibernateSessionProxyInterceptor.java:30)
     at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
     at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
     at org.jboss.seam.intercept.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:50)
     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.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.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.invokeInCallerTx(TxPolicy.java:126)
     ... 87 more

I don't know what was wrong here

[jasti_jenny]

when I change the stateless bean to stateful and the scope as session, I get the value of the variable gwpsProofWorkflow but it is not reflected to the value that I have entered on the xhtml. I am not sure what was wrong here, help me out.

Thanks.

[jasti_jenny]

I need the provision to edit the data that is already stored. So i am calling a method from pages.xml which retrieves the data to a variable which is outjected.

I am displaying the data in the in the html text forms which can be edited by the user, when the user clicks the data it should be saved back to the same tables.

Can we use bijection in this manner, If so can someone tell me if I am doing something wrong with the above code.

Thanks

[kragoth]

Please posts the relevant sections of your pages.xml and also please post the entire Seam bean code (except for the imports) so we can see the @Name annotation and the @Scope.

Because I can't see in the above example what is calling this method.

public void authorList()
   {
        log.info("hellooooooo"+proof);     
        ccListSelected = new ArrayList();
        GwpsProofWorkflow proofWorkflow = (GwpsProofWorkflow)entityManager.createQuery("FROM GwpsProofWorkflow gwps where gwps.gwpsProof.proofId=:proof_id" +
                 " and reviewOrder=:reviewOrder")
                           .setParameter("proof_id", proof)
                           .setParameter("reviewOrder", reviewOrder)
                     .getSingleResult();
       
        gwpsProofWorkflow = proofWorkflow;
   }   

[trunikov.dmitry.trunikov.zoral.com.ua]

Jenny Jasti wrote on Sep 17, 2009 17:29:


when I change the stateless bean to stateful and the scope as session, I get the value of the variable gwpsProofWorkflow but it is not reflected to the value that I have entered on the xhtml. I am not sure what was wrong here, help me out.

Thanks.

it seems that when you submit the form the component is not found, so seam instantiates a new one. the new component is not initialized so you code throws the exception (as some members in the component have null values).
from your posts i made conclusion that the component is a stateless bean, so i assume that you likely don't use conversation. in this case you should check your page.xml file and make sure that it has instructions to assign entity's id to a component's member from a http parameter (see instruction param) and calls method which will initialize the component (see instruction action). In such way when you submit the form the seam assigngs entity's id to member in the component and then calls method which uses that memeber (entity's id) to initialize component (load entity by id) and then calls action method.

[jasti_jenny]

I took your suggestion and added the entityId to the pages.xml and even here it displayed the data perfectly fine for editing but when I save the data back by editing it is not taking the value which I have changed.

Here is the code I have added to pages.xml

<page view-id="/authorList.xhtml">
    <param name="gwpsProofWorkflowId" value="#{workflow.proofWorkflowId}" converterId="javax.faces.Long"/>     
     <action execute= "#{authorList.authorList}"/>
      <navigation from-action="#{authorList.saveCcList}">
          <redirect view-id="/hello.xhtml"/>         
      </navigation>     
    </page>

My scope is session and my bean Name is authorList. Can some one help me out, i am out of options not.

[aravindkosuri]

Seam UI control s:button does not submit an HTML form when included on the page. Due to this reason either you get swallowing exception or unmodified data back to your action class when your bean scope is session.

Use <h:commandButton/> along with <s:conversationId/> tag to resolve this issue.