Struts2/Tiles internal exception

Question

I have a JSP, which calls an action using the <s:action> tag:

<s:form>
    <s:action name="myaction"
        namespace="/utente/include" executeResult="true"
        ignoreContextParams="true" var="formattazione" />
    
    //do something
</s:form>

The action myaction is called, i can follow the flow debugging it. It finishes fine without error, it returns success, but then there is an error and i can't understand which one.

The action definition:

<package name="utente-include" namespace="/utente/include" extends="tiles-default">
    
    <action name="myaction" class="com.emaborsa.doctracing.web.action.formattazione.FormattazioneCriteriUtenteAction"
        method="formattazione">
        <result type="tiles">mytiles.def</result>
    </action>
    
</package>

The tiles definition:

<definition name="mytiles.def" template="/pages/empty.jsp">
    <put-attribute name="body" value="/pages/mypage.jsp"/>
</definition>

The empty.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib uri="http://tiles.apache.org/tags-tiles" prefix="tiles" %>
<tiles:insertAttribute name="body" />

The Exception:

GRAVE: Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
at org.apache.struts2.views.jsp.ComponentTagSupport.doStartTag(ComponentTagSupport.java:49)
at org.apache.jsp.pages.utente.elencoUtenti_jsp._jspx_meth_s_005fif_005f0(elencoUtenti_jsp.java:215)
at org.apache.jsp.pages.utente.elencoUtenti_jsp._jspx_meth_s_005fform_005f0(elencoUtenti_jsp.java:155)
at org.apache.jsp.pages.utente.elencoUtenti_jsp._jspService(elencoUtenti_jsp.java:87)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
.....

EDIT:

I thought it works, but it doesn't. Actually the system doesn't crash, but the tiles-page is not included in the mail page. The Exception i get:

org.apache.tiles.impl.CannotRenderException: No request dispatcher returned for path '/../pages/common/myPage.jsp'
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:680)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:633)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:322)
at org.apache.struts2.views.tiles.TilesResult.doExecute(TilesResult.java:105)
at org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186)
at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:361)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:265)
at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:163)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)

Here my myPage.jsp (actually it doesn't matter what is written in):

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>

<div class="navigazioneElenco" id="navigazioneElenco">

</div>

Here I share a part of my project. There is only the part which is not working... DOWNLOAD

[Take a look at this, it *may* help...](https://issues.apache.org/jira/browse/WW-2995?focusedCommentId=12824702&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-12824702) — Andrea Ligios, Oct 01 '13 at 16:41
If you are using Struts2-Tiles3, take a look at this: http://stackoverflow.com/a/14540358/1654265 — Andrea Ligios, Oct 02 '13 at 08:42
It's not a problem of lists or somthing similar. The myPage is never loaded, i've tried also to pass a jsp with only a text string and i get the same error. It seems that struts doesn't recognize the tiles definition... — Emaborsa, Oct 02 '13 at 08:51
try with `` . If it doesn't work, post more information: version of Struts, version of Tiles, directories structure, etc — Andrea Ligios, Oct 02 '13 at 09:05
Post your web.xml and url used to call action - NPE there means Dispatcher wasn't initialised — Lukasz Lenart, Oct 03 '13 at 14:21
I did some experiments. I've seen that if i'm using jsp prefixed tags `` and struts prefixed tags `` in the same JSP, it crashes. If i remove one of these, it doens't throw Exceptions. Is it ok or is it a bug? — Emaborsa, Oct 03 '13 at 14:36
...i was not able to make it run. I get an exception and on the web i can't find any help. I get `org.apache.tiles.impl.CannotRenderException: No request dispatcher returned for path '/../pages/common/mzPage.jsp'` — Emaborsa, Oct 07 '13 at 14:47
I found out the problem. It's not a tiles or struts component that bothers...again it complains if i use an `` tag and other struts tags in the same jsp. If i use only this ` it works. — Emaborsa, Oct 08 '13 at 06:48
I added the link to download my project...please take a look. — Emaborsa, Oct 15 '13 at 07:09

Vinoth Krishnan · Answer 1 · 2013-10-01T16:56:19.667

0

May this error comes from your jsp page. Can you post the code available in mypage.jsp? Or check manually did u using any scriptlet tags may cause the null pointer exception. Check the values by using struts logic tags. So you might not come across null pointer exception.

edited Oct 01 '13 at 16:56

answered Oct 01 '13 at 16:50

Vinoth Krishnan

2,925
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Well, i tries to pass other jsp pages, which on a usual call they work, but in this case they doesn't work. I also tries to call this action (myaction) directly from the URL, and the result is displayed...so the problem must be in the struts/tiles definition (i guess) – Emaborsa Oct 02 '13 at 06:10

score 0 · Answer 2 · answered Oct 16 '13 at 18:47

0

Solved updating to Struts 2.3.15.2

answered Oct 16 '13 at 18:47

Emaborsa

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Struts2/Tiles internal exception

2 Answers2