Can't load action classes

[Patrick Coskren <pc...@unitedmedia.com>]

Hi, all.

	I'm new to Struts (though not to Java development), and at this 
point I'm just trying to get a very simple page up and running.  The 
page itself displays fine; its main feature is an <html:link> tag that 
points to the action "/add.do".  When I click the link, the browser 
comes back with:

Error 500
Location JspAdder/add.do
No action instance for path /add could be created

Looking at servlet.log, it turns out that the right class is recognized 
(um.AdderPageAddAction), but ActionServlet can't load it.  Here's the 
stack trace:

> 2001-07-26 02:06:48 - path="/JspAdder" :action: Mapping for servlet 
> 'action' = '*.d\
> o'
> 2001-07-26 02:06:52 - path="/JspAdder" :action: Processing a GET for 
> /add
> 2001-07-26 02:07:39 - path="/JspAdder" :action: Setting locale 'english'
> 2001-07-26 02:07:39 - path="/JspAdder" :action:  Looking for Action 
> instance for cl\
> ass um.comicsmail.AdderPageAddAction
> 2001-07-26 02:07:39 - path="/JspAdder" :action:   Double checking for 
> Action instan\
> ce already there
> 2001-07-26 02:07:39 - path="/JspAdder" :action:   Creating new Action 
> instance
> 2001-07-26 02:07:39 - path="/JspAdder" :action: Error creating Action 
> instance for \
> path '/add', class name 'um.AdderPageAddAction' - 
> java.lang.ClassNotFoun\
> dException: um.AdderPageAddAction
>     at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
>     at java.security.AccessController.doPrivileged(Native Method)
>     at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
>     at java.lang.ClassLoader.loadClass(ClassLoader.java:297)
>     at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
>     at java.lang.Class.forName0(Native Method)
>     at java.lang.Class.forName(Class.java:120)
>     at 
> org.apache.struts.action.ActionServlet.processActionCreate
> (ActionServlet.jav\
> a:1630)

It's as though the class loader doesn't have my action class in its 
classpath.  But according to the jasper.log, the classpath is correct:

> 2001-07-26 02:06:47 - Scratch dir for the JSP engine is: 
> /Applications/tomcat/work/\
> localhost%2FJspAdder
> 2001-07-26 02:06:47 - IMPORTANT: Do not modify the generated servlets
> 2001-07-26 02:10:42 - JspEngine --> /index.jsp
> 2001-07-26 02:10:42 -        ServletPath: /index.jsp
> 2001-07-26 02:10:42 -           PathInfo: null
> 2001-07-26 02:10:42 -           RealPath: 
> /Users/patrick/Documents/Development/Comi\
> csMail/FigureStudies/JspAdder/index.jsp
> 2001-07-26 02:10:42 -         RequestURI: /JspAdder/index.jsp
> 2001-07-26 02:10:42 -        QueryString: null
> 2001-07-26 02:10:42 -     Request Params:
> 2001-07-26 02:10:42 - Classpath according to the Servlet Engine is: 
> /Users/patrick/\
> Documents/Development/ComicsMail/FigureStudies/JspAdder/WEB-INF/classes

And the file its looking for is in that classes directory, which is 
readable.  Does anyone have any ideas what I'm missing here?  I'm using 
Java 1.3 on Mac OS X.

Thanks for any pointers,
-Patrick