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Posted to dev@myfaces.apache.org by rageice <ra...@rastamail.com> on 2008/05/16 12:26:54 UTC
java.lang.NullPointerException: context

Hello everybody, and sorry for my bad English.
A very very strange error for me. Before trying others myfaces "extensions"
like tomahawk and others, I wanted to do the most simple test with
myfaces-core-1.2.3.
So, I just did a forward in my index.jsp to my home.jsp. (my files are
displayed after). But I have the following error:

java.lang.NullPointerException: context
	at
javax.faces.component.UIComponentBase.getRenderer(UIComponentBase.java:845)
	at
javax.faces.component.UIComponentBase.getRendersChildren(UIComponentBase.java:333)
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:237)
	at
org.apache.myfaces.application.jsp.JspViewHandlerImpl.actuallyRenderView(JspViewHandlerImpl.java:424)
	at
org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:380)
	at
org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)
	at
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:140)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:152)
	at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
	at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
	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:447)
	at java.lang.Thread.run(Unknown Source)

If I don't use the jsp:forward and I use jsf tags directly in index.jsp, no
problem.
I am actually using eclipse. If I do EXACTLY the same thing with netbeans,
no problem. (I am almost sure of using the good libraries in eclipse). And
if I do EXACTLY the same thing with the sun reference implementation, no
problem. And absolutely no info about this on google. So any idea or
suggestion is welcome.
This is my files:

WEB.XML:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID"
version="2.5">
  <display-name>myfaces-core-1.2.3</display-name>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>Faces Servlet</servlet-name>
    <url-pattern>*.jsf</url-pattern>
  </servlet-mapping>
</web-app>



INDEX.JSP:

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1" %>
    
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
	<jsp:forward page="/faces/home.jsf"/>	 
</body>
</html>


HOME.JSP

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1" %>

<%@taglib prefix="h" uri="http://java.sun.com/jsf/html"%>
<%@taglib prefix="f" uri="http://java.sun.com/jsf/core"%>    
    
    
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
	<f:view>
		<h:form>
			<h:outputText
				value="Hello World"
			/>
		</h:form>	
	</f:view>
</body>
</html>



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