Servlet "X" is not available

Question

I have a simple application. I'm trying to follow the MVC Pattern.
I receive the following messages.
HTTP Status 404 - Servlet Bla is not available
type Status report
message Servlet Bla is not available
description The requested resource (Servlet Bla is not available) is not available.
Apache Tomcat/6.0.20or sometimes I receive
javax.servlet.ServletException: Wrapper cannot find servlet class pachet.DispatcherServlet or a class it depends on
SEVERE: Allocate exception for servlet Bla
java.lang.ClassNotFoundException: pachet.DispatcherServlet
20.09.2009 11:56:39 org.apache.catalina.core.StandardWrapperValve invokeweb.xml
   <servlet>
        <servlet-name>Bla</servlet-name>
        <servlet-class>pachet.DispatcherServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>Bla</servlet-name>
        <url-pattern>/dispatcher</url-pattern>
    </servlet-mapping>I'm using an IDE and if I would change, let's say the package name from the web.xml, it would warn me that the path is wrong, but in this moment, I don't receive any warning about anything.
Edited by: abcdriver on Sep 20, 2009 2:02 AM

Answer 1

The error message seems clear enough:
Wrapper cannot find servlet class pachet.DispatcherServlet or a class it depends onIs your class called DispatcherServlet in the package pachet? Double check the spelling - remember it is case sensitive.
Is that class deployed in your web application? WEB-INF/classes/pachet/DispatcherServlet.class?
What dependencies does your class have? What classes need to be present for it?
Are all of them available in the web application classpath?