Struts Exception on undeploy

[raja05]

I have a basic app that uses Struts 1.1RC1 , everything works well when the app is deployed. When i try to undeploy the app, i get a stack trace that a resource is not found.
When i looked at the struts code, this is what i have.

if (log.isTraceEnabled()) {
log.trace(" Loading resource '" + name + "'");
}
ClassLoader classLoader =
Thread.currentThread().getContextClassLoader();
if (classLoader == null) {
classLoader = this.getClass().getClassLoader();
}
is = classLoader.getResourceAsStream(name);


The "name" thats loaded is org/apache/struts/action/ActionResources.properties which is a standard properties file that comes along with Struts. The interesting part is this is getting loaded during initialization but fails only during undeployment.
This is the Stack Trace that i get from jboss.
java.lang.NullPointerException
at org.apache.naming.resources.WARDirContext.treeLookup(WARDirContext.java:842)
at org.apache.naming.resources.WARDirContext.getAttributes(WARDirContext.java:493)
at org.apache.naming.resources.WARDirContext.getAttributes(WARDirContext.java:474)
at org.apache.naming.resources.BaseDirContext.getAttributes(BaseDirContext.java:789)
at org.apache.naming.resources.ProxyDirContext.cacheLoad(ProxyDirContext.java:1426)
at org.apache.naming.resources.ProxyDirContext.cacheLookup(ProxyDirContext.java:1350)
at org.apache.naming.resources.ProxyDirContext.lookup(ProxyDirContext.java:257)
at org.apache.catalina.loader.WebappClassLoader.findResourceInternal(WebappClassLoader.java:1691)
at org.apache.catalina.loader.WebappClassLoader.findResource(WebappClassLoader.java:999)
at org.apache.catalina.loader.WebappClassLoader.getResourceAsStream(WebappClassLoader.java:1203)
at org.apache.struts.util.PropertyMessageResources.loadLocale(PropertyMessageResources.java:294)
at org.apache.struts.util.PropertyMessageResources.getMessage(PropertyMessageResources.java:192)

Shoudnt the classloader be able to find this resource given that its a part of the struts distribution?

TIA.
Raj

[raja05]

Did a little more research on the AbstractwebContainer.java that does the start/stop for web apps.
Shouldnt the stop set the contextclass loader before it calls performUndeploy(). The code in performDeploy is something like

Thread thread = Thread.currentThread();
ClassLoader appClassLoader = thread.getContextClassLoader();
try
{
// Create a classloader for the war to ensure a unique ENC
URL[] empty = {};
URLClassLoader warLoader = URLClassLoader.newInstance(empty, di.ucl);
thread.setContextClassLoader(warLoader);
...............................


but the stop method just does a performUndeploy which means its operating on the appclassloader rather than the thread contextclassloader.
since struts depends on the threadcontextclassloader to get some resources, the undeploy operation fails.

Is this a bug in Jboss or am i wrong in my conclusion above?
I will post this in Tomcat forum also.

One other thing i did was move all the struts libraries to the default/lib directory and in this case i did *NOT* have any issues as the appclassloader does find these classes and loads the resources.

TIA
Raj