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java servlet newbie problem

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lasse_heinonen7@hotmail.com - 14 Jul 2006 14:34 GMT
Hi, I can't get my Java servlets to work. Tomcat-4.1.31 and the example
servlets work fine.
I have added my own context "eka" under webapps.
The code builds ok:

package paketti1;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class Eka1 extends HttpServlet {

       public void doGet ( HttpServletRequest request,
HttpServletResponse response )
       throws ServletException, IOException    {

               response.setContentType("text/html");
               PrintWriter out = response.getWriter();

               out.println("<html>");
               out.println("<head><title>He llo, Cruel
World!</title></head>");
               out.println("<body>");
               out.println("<h1>Hello, Cruel World !</h1>");
               out.println("This is my last servlet.");
               out.println("</body>");
       }// end doGet

}///:~

This is what I have added to server.xml:
<Context path="/eka" docBase="eka" debug="0" reloadable="true" />

my web.xml:
<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
   PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
   "http://java.sun.com/dtd/web-app_2_3.dtd">

<web-app>

<servlet>
       <servlet-name>Eka1</servlet-name>
       <servlet-class>paketti1.Eka1</servlet-class>
</servlet>

<servlet-mapping>
       <servlet-name>Eka1</servlet-name>
       <url-pattern>/Eka1</url-pattern>
</servlet-mapping>

</web-app>

My class file is here:
/usr/local/jakarta-tomcat-4.1.31/webapps/eka/WEB-INF/classes/paketti1

I put this to address bar http://localhost:8080/eka/Eka1
and I received an error message:

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: Wrapper cannot find servlet class
paketti1.Eka1 or a class it depends on
    at
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:844)
    at
org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:621)
    at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:163)
    at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
    at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
    at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
    at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:144)
    at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
    at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
    at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
    at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2358)
    at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:133)
    at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
    at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)
    at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
    at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)
    at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
    at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
    at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
    at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:127)
    at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
    at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
    at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
    at
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:152)
    at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
    at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
    at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
    at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
    at java.lang.Thread.run(Thread.java:595)

root cause

java.lang.ClassNotFoundException: paketti1.Eka1
    at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1407)
    at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1252)
    at
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:838)
    at
org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:621)
    at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:163)
    at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
    at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
    at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
    at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:144)
    at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
    at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
    at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
    at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2358)
    at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:133)
    at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
    at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)
    at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
    at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)
    at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
    at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
    at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
    at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:127)
    at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
    at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
    at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
    at
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:152)
    at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
    at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
    at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
    at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
    at java.lang.Thread.run(Thread.java:595)

Apache Tomcat/4.1.31

What have I done wrong?
Regars Lasse
Reply to this Message
Greger - 14 Jul 2006 15:02 GMT
> Hi, I can't get my Java servlets to work. Tomcat-4.1.31 and the example
> servlets work fine.
[quoted text clipped - 45 lines]
> <servlet-mapping>
>         <servlet-name>Eka1</servlet-name>
====>>>         <url-pattern>/Eka1</url-pattern>

> </servlet-mapping>
>
> </web-app>
>
> My class file is here:
> /usr/local/jakarta-tomcat-4.1.31/webapps/eka/WEB-INF/classes/paketti1

> I put this to address bar http://localhost:8080/eka/Eka1

try
http://localhost:8080/Eka1

Greger
> and I received an error message:
>
[quoted text clipped - 12 lines]
> paketti1.Eka1 or a class it depends on
> at

org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:844)
> at

org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:621)
> at

org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:163)
> at
> org.apache.catalina.core.StandardPipelin
$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
> at

org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
> at

org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:144)
> at
> org.apache.catalina.core.StandardPipelin
$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
> at

org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
> at
> org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2358)
> at

org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:133)
> at
> org.apache.catalina.core.StandardPipelin
$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
> at

org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)
> at
> org.apache.catalina.core.StandardPipelin
$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
> at

org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)
> at
> org.apache.catalina.core.StandardPipelin
$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
> at

org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
> at

org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:127)
> at
> org.apache.catalina.core.StandardPipelin
$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
> at

org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
[quoted text clipped - 4 lines]
> at
> org.apache.coyote.http11.Http11Protoco
$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
> at
> org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
> at
> org.apache.tomcat.util.threads.ThreadPoo
$ControlRunnable.run(ThreadPool.java:683)
> at java.lang.Thread.run(Thread.java:595)
>
> root cause
>
> java.lang.ClassNotFoundException: paketti1.Eka1
> at

org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1407)
> at

org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1252)
> at

org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:838)
> at

org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:621)
> at

org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:163)
> at
> org.apache.catalina.core.StandardPipelin
$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
> at

org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
> at

org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:144)
> at
> org.apache.catalina.core.StandardPipelin
$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
> at

org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
> at
> org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2358)
> at

org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:133)
> at
> org.apache.catalina.core.StandardPipelin
$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
> at

org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)
> at
> org.apache.catalina.core.StandardPipelin
$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
> at

org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)
> at
> org.apache.catalina.core.StandardPipelin
$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
> at

org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
> at

org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:127)
> at
> org.apache.catalina.core.StandardPipelin
$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
> at

org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
[quoted text clipped - 4 lines]
> at
> org.apache.coyote.http11.Http11Protoco
$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
> at
> org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
> at
> org.apache.tomcat.util.threads.ThreadPoo
$ControlRunnable.run(ThreadPool.java:683)
> at java.lang.Thread.run(Thread.java:595)
>
> Apache Tomcat/4.1.31
>
> What have I done wrong?
> Regars Lasse
Signature

QxRSSReader v1.2.6a released (30-06-2006)
http://www.gregerhaga.net/
There are no stupid questions, only stupid answers.

Reply to this Message
lasse_heinonen7@hotmail.com - 14 Jul 2006 15:17 GMT
This didn't help:
HTTP Status 404 - /Eka1

type Status report

message /Eka1

description The requested resource (/Eka1) is not available.
Apache Tomcat/4.1.31

Greger kirjoitti:

> > Hi, I can't get my Java servlets to work. Tomcat-4.1.31 and the example
> > servlets work fine.
[quoted text clipped - 248 lines]
> http://www.gregerhaga.net/
> There are no stupid questions, only stupid answers.
Reply to this Message
Juha Laiho - 20 Jul 2006 10:27 GMT
lasse_heinonen7@hotmail.com said:
>Hi, I can't get my Java servlets to work. Tomcat-4.1.31 and the example
>servlets work fine.
>I have added my own context "eka" under webapps.

Pretty much everything seems ok.

>The code builds ok:
>
[quoted text clipped - 4 lines]
>
>public class Eka1 extends HttpServlet {

I suppose the generated class file is named Eka1.class (note the capital
E in the file name)?

>This is what I have added to server.xml:
><Context path="/eka" docBase="eka" debug="0" reloadable="true" />

Looks good. You could try increasing the debug level, though.

>My class file is here:
>/usr/local/jakarta-tomcat-4.1.31/webapps/eka/WEB-INF/classes/paketti1

Seems correct. Does the Tomcat runtime account (so, the user account
under which you're running the tomcat processes) have at least read
access to everything within webapps/eka?

>javax.servlet.ServletException: Wrapper cannot find servlet class
>paketti1.Eka1 or a class it depends on

... I wonder where/why this happens. The error message is clear, at
least.
Signature

Wolf  a.k.a.  Juha Laiho     Espoo, Finland
(GC 3.0) GIT d- s+: a C++ ULSH++++$ P++@ L+++ E- W+$@ N++ !K w !O !M V
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"...cancel my subscription to the resurrection!" (Jim Morrison)

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