Action class not found when using error-page redirect from web.xml

[Craig Dickson <cd...@aol.com>]

I am attempting to set up an error handling framework for our
application. I am aware that we could register an exception handler in
the struts config, but we are attempting to achieve a similar result
using the basic functionality provided by the web.xml file.

We have the following declaration in our web.xml file :
     <error-page>
         <exception-type>java.lang.Throwable</exception-type>
         <location>/do/error</location>
     </error-page>

And in our struts-config.xml we have:
     <action
       path="/error"
       type="com.aol.ygp.wia.admin.ErrorAction"
       name="error"
       scope="request"
       unknown="false"
       validate="true"
     >
       <forward
         name="success"
         path=".error"
         redirect="false"
       />
     </action>

So when a checked exception is thrown from one of our Action classes, we
simply want to fo to our ErrorAction class and then use a forward to a
tile definition. However when this executes and an exception is thrown,
the following exception occurs:

Aug 30, 2004 3:24:16 PM org.apache.struts.util.RequestUtils createActionForm
WARNING: No FormBeanConfig found under 'error'
Aug 30, 2004 3:24:16 PM org.apache.struts.action.RequestProcessor
processActionCreate
SEVERE: No action instance for path /error could be created
java.lang.ClassNotFoundException: com.aol.ygp.wia.admin.ErrorAction
         at java.net.URLClassLoader$1.run(URLClassLoader.java:198)
         at java.security.AccessController.doPrivileged(Native Method)
         at java.net.URLClassLoader.findClass(URLClassLoader.java:186)
         at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
         at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:272)
         at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
         at
org.apache.struts.util.RequestUtils.applicationClass(RequestUtils.java:119)
         at
org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:145)
         at
org.apache.struts.action.RequestProcessor.processActionCreate(RequestProcessor.java:282)
         at
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:220)
         at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1158)
         at
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:397)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
         at
weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:971)
         at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:402)
         at 
weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
         at
weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
         at
com.aol.ygp.wia.servlet.RequestParameterFilter.doFilter(RequestParameterFilter.java:104)
         at
weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
         at
com.aol.ygp.webcommons.filter.SnsFilter.doFilter(SnsFilter.java:182)
         at
weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
         at
weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:305)
         at
weblogic.servlet.internal.ForwardAction.run(ForwardAction.java:23)
         at
weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:317)
         at
weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118)
         at
weblogic.servlet.internal.WebAppServletContext.handleException(WebAppServletContext.java:3861)
         at
weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3683)
         at
weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2585)
         at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)

Anyone know why the class cannot be loaded? When I go to that page 
direcly from the browser (e.g. http://myserver/do/error), the page 
renders just fine.

Thanks




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