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http://issues.apache.org/bugzilla/show_bug.cgi?id=36682

           Summary: struts-examples webapp does not work (NPE at
                    TagUtils.java:1027)
           Product: Struts
           Version: Nightly Build
          Platform: Other
               URL: http://wiki.wsmoak.net/cgi-bin/wiki.pl?StrutsExampleApps
        OS/Version: Windows XP
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Example
        AssignedTo: dev@struts.apache.org
        ReportedBy: [EMAIL PROTECTED]


To reproduce, build and deploy struts-examples.war, then visit
http://localhost:8080/struts-examples.  

See also: http://www.mail-archive.com/dev%40struts.apache.org/msg11843.html

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from
fulfilling this request.

exception

javax.servlet.ServletException
        
org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:192)
        org.apache.struts.action.ActionServlet.process(ActionServlet.java:1934)
        org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:429)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

org.apache.jasper.JasperException
        
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:372)
        org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
        org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        
org.apache.struts.chain.commands.servlet.PerformForward.perform(PerformForward.java:95)
        
org.apache.struts.chain.commands.AbstractPerformForward.execute(AbstractPerformForward.java:55)
        
org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:37)
        org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:166)
        
org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:175)
        org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:166)
        
org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:189)
        org.apache.struts.action.ActionServlet.process(ActionServlet.java:1934)
        org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:429)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

java.lang.NullPointerException
        org.apache.struts.taglib.TagUtils.pageURL(TagUtils.java:1027)
        
org.apache.struts.taglib.TagUtils.computeURLWithCharEncoding(TagUtils.java:451)
        
org.apache.struts.taglib.TagUtils.computeURLWithCharEncoding(TagUtils.java:314)
        org.apache.struts.taglib.html.LinkTag.calculateURL(LinkTag.java:463)
        org.apache.struts.taglib.html.LinkTag.doStartTag(LinkTag.java:341)
        org.apache.jsp.welcome_jsp._jspx_meth_html_link_3(welcome_jsp.java:252)
        org.apache.jsp.welcome_jsp._jspService(welcome_jsp.java:96)
        org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
        org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
        org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        
org.apache.struts.chain.commands.servlet.PerformForward.perform(PerformForward.java:95)
        
org.apache.struts.chain.commands.AbstractPerformForward.execute(AbstractPerformForward.java:55)
        
org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:37)
        org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:166)
        
org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:175)
        org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:166)
        
org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:189)
        org.apache.struts.action.ActionServlet.process(ActionServlet.java:1934)
        org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:429)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

note The full stack trace of the root cause is available in the Apache
Tomcat/5.0.30 logs.
Apache Tomcat/5.0.30

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