Home Tutorialhelp Comment Null Pointer exception in Struts2HelloWorld

 
 

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Suraj Gupta
Null Pointer exception in Struts2HelloWorld,
September 11, 2007 at 3:35 PM

I downloaded "struts2-blank-2.0.9" and configured it as per this site to run the Struts2HelloWorld application.

The build was successful.

----------------------
Buildfile: build.xml

clean:
[delete] Deleting directory C:\Program Files\Apache Software Foundation\Tomca
t 5.5\webapps\struts2tutorial\WEB-INF\classes
[mkdir] Created dir: C:\Program Files\Apache Software Foundation\Tomcat 5.5\
webapps\struts2tutorial\WEB-INF\classes

prepare:
[copy] Copying 1 file to C:\Program Files\Apache Software Foundation\Tomcat
5.5\webapps\struts2tutorial\WEB-INF\src\classes

resources:

compile:
[javac] Compiling 1 source file to C:\Program Files\Apache Software Foundati
on\Tomcat 5.5\webapps\struts2tutorial\WEB-INF\src\classes
[jar] Building jar: C:\Program Files\Apache Software Foundation\Tomcat 5.5
\webapps\struts2tutorial\WEB-INF\lib\struts2tutorial.jar

project:

all:

BUILD SUCCESSFUL
Total time: 4 seconds
---------------------------------------

But when I am trying to open the HelloWorld.jsp page in the browser I am getting Null pointer exception.

-----------------------------------------------
HTTP Status 500 -

--------------------------------------------------------------------------------

type Exception report

message

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

exception

org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


root cause

java.lang.NullPointerException
org.apache.struts2.views.jsp.TagUtils.getStack(TagUtils.java:58)
org.apache.struts2.views.jsp.StrutsBodyTagSupport.getStack(StrutsBodyTagSupport.java:52)
org.apache.struts2.views.jsp.ComponentTagSupport.doStartTag(ComponentTagSupport.java:49)
org.apache.jsp.example.HelloWorld_jsp._jspx_meth_s_text_0(org.apache.jsp.example.HelloWorld_jsp:127)
org.apache.jsp.example.HelloWorld_jsp._jspService(org.apache.jsp.example.HelloWorld_jsp:69)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
------------------------------------------------

I searched in google with this exception on this link

https://issues.apache.org/struts/browse/WW-1969

Plz assist me.
Thanks in advance.




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