I'm trying to get to know tomcat 6. I am experimenting with editing one of
the java classes in apache-tomcat-6.0.18/webapps/examples/WEB-INF/classes
I have replaced the contents of HelloWorldExample.java with my own code
which server a web page . One of the lines of code is:
public void doGet(HttpServletRequest req, HttpServletResponse res)
The code compiles fine and runs fine.
Now I want to add some code which might throw an exception so I modify the
above line to read :
public void doGet(HttpServletRequest req, HttpServletResponse res) throws
IOException, ServletException
The file again compiles without problem. But now when I start the tomcat
instance I see the following errors in the logs :
Dec 17, 2008 1:23:02 PM org.apache.catalina.core.StandardContext
listenerStart
SEVERE: Error configuring application listener of class
listeners.ContextListener
java.lang.NoClassDefFoundError:
javax/servlet/ServletContextAttributeListener
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
The "javax/servlet/ServletContextAttributeListener" is definately there and
the location is included in the environmental variable "CLASSPATH"
Now the tomcat server is totally disfunctional and gives me HTTP STatus 404
when I do to the servlet demo page.
George
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