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From "Cyril Gambis (JIRA)" <j...@apache.org>
Subject [jira] Commented: (WW-1969) Error in TagUtils (NullPointerException) when viewing a page which didn't go through Struts 2 interceptor stack
Date Thu, 07 Jun 2007 13:29:35 GMT

    [ https://issues.apache.org/struts/browse/WW-1969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_41183
] 

Cyril Gambis commented on WW-1969:
----------------------------------

If the filter is changed in order to have every request go through the interceptor stack,
then there is no problem.
But for legacy application which have Struts 1 or something else, and for applications with
only jsp with the internationalization of Struts 2, it is a big problem.

Cyril

> Error in TagUtils (NullPointerException) when viewing a page which didn't go through
Struts 2 interceptor stack
> ---------------------------------------------------------------------------------------------------------------
>
>                 Key: WW-1969
>                 URL: https://issues.apache.org/struts/browse/WW-1969
>             Project: Struts 2
>          Issue Type: Bug
>          Components: Views
>    Affects Versions: 2.0.6
>         Environment: Tomcat 4.1
> Java 1.4
> Struts 2 - Java 1.4 retrotranslated version
>            Reporter: Cyril Gambis
>            Priority: Critical
>
> I searched for that item and havn't find anything in JIRA. I think there may be a patch
because it is quite a serious issue and it is a regression from Struts 2.0.5 as I read on
some forum.
> With this bug, some HelloWorld tutorials don't work anymore.
> The stack trace is:
> Stacktrace:
> org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrappe r.java:467)
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:389)
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:315)
> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
> root cause
> java.lang.NullPointerException
> org.apache.struts2.views.jsp.TagUtils.getStack(TagUtils.java:58)
> org.apache.struts2.views.jsp.StrutsBodyTagSupport.getStack(StrutsBodyTagSupport .java:54)
> org.apache.struts2.views.jsp.ComponentTagSupport.doStartTag(ComponentTagSupport .java:49)
> org.apache.jsp.WebContent.index_jsp._jspx_meth_s_005fhead_005f0(index_jsp.java: 155)
> org.apache.jsp.WebContent.index_jsp._jspService(index_jsp.java:77)
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:328)
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:315)
> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:803) 
> I understand that if you access directly a jsp page containing a tag like s:text, s:a
or s:url, which usually won't need for a value stack. A solution may be to have everything
go through the struts 2 interceptor stack, but believe me, for legacy application it is sometimes
not easy at all (one of my developer has work on this problem for 2 days, currently).
> Is there any patch, anywhere? Especially for the Java 1.4 version or Struts 2?
> Some links:
> http://forums.opensymphony.com/thread.jspa?messageID=155149&#155149
> http://www.mail-archive.com/user@struts.apache.org/msg57582.html
> Thanks!
> Cyril Gambis

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