NullPointerException on tiles

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Posts: 51

posted 16 years ago

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Hello good forumites ... First time here & glad to end up here .. I'm pretty new in almost everything on Java but not doing too bad... I have a small app using tiles with struts on JSP

Here's my tile definition ...

and my JSP

<%@ page language="java" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/jstl/core_rt" prefix="c" %>
<%@ taglib uri="http://struts.apache.org/tags-tiles-el" prefix="tiles" %>
<%@ taglib uri="http://struts.apache.org/tags-bean-el" prefix="bean" %>
<%@ taglib uri="http://struts.apache.org/tags-logic-el" prefix="logic" %>
<%@ taglib uri="http://struts.apache.org/tags-html-el" prefix="html" %>
 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html:html lang="true">
  <head>    
    <title>FullLayout.jsp</title>
 

 
  </head>
  
  <body>   
    <html:errors/>
    <table cellspacing ="0" cellpadding ="0" width="100%" height="100%">
<tbody>
<tr height="50">

</tr>
<tr>
<td>
<table cellspacing ="2" cellpadding ="1" width="100%" height="100%" border="2" align="center">
<tr height="100%">

</tr>
</table>
</td>
</tr>
<tr height="50">

</tr>
</tbody>
</table> 
  </body>
</html:html>

Please note that i've commented all insertions of tiles, but still get the Exception, so problem is not likely to be on my JSP

stack trace

org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:346)
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:810)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:263)
org.apache.struts.action.RequestProcessor.internalModuleRelativeForward(RequestProcessor.java:1023)
org.apache.struts.tiles.TilesRequestProcessor.internalModuleRelativeForward(TilesRequestProcessor.java:345)
org.apache.struts.action.RequestProcessor.processForward(RequestProcessor.java:572)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:221)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)

root cause 
 
java.lang.NullPointerException
org.apache.struts.taglib.tiles.InsertTag.processAttribute(InsertTag.java:687)
org.apache.struts.taglib.tiles.InsertTag.createTagHandler(InsertTag.java:478)
org.apache.struts.taglib.tiles.InsertTag.doStartTag(InsertTag.java:438)
org.apache.strutsel.taglib.tiles.ELInsertTag.doStartTag(ELInsertTag.java:282)
org.apache.jsp.DeltaProfileForm_jsp._jspx_meth_tiles_insert_0(DeltaProfileForm_jsp.java:177)
org.apache.jsp.DeltaProfileForm_jsp._jspx_meth_html_html_0(DeltaProfileForm_jsp.java:113)
org.apache.jsp.DeltaProfileForm_jsp._jspService(DeltaProfileForm_jsp.java:66)
................
...........

Please help!

Songezo Nkukwana

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Posts: 51

posted 16 years ago

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Could a missing struts-tiles.jar be causing this perhaps? I've added struts-tiles.jar but get a ClassNotFoundError for TilesPlugin. I think because TilesPlugin appears in both struts.jar & struts-tiles-1.3.5.jar ... This is my second day still stuck on the same problem

Mark Spritzler

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Posts: 17347

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posted 16 years ago

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We might find better answers in the more appropriate Struts forum. So I will move this there for ya.

Good Luck, and make sure you don't go over board with tiles definitions and its inheritance. I once worked on a project where tiles definitions went 6 levels deep in heirarchy, and things like level 2 and 5 added absolutely nothing.

Mark

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