I am having the same problem with JBoss AS 4.0.3
Did you find a remedy?
Yes. I use struts and it turns out that if the action doesn't appear correctly in the struts.xml and the web.xml, you can see this behaviour.
In my case, I had an action that was called
But in my web.xml it was called /MyComponentDelete.do. By changing the name to /MyComponentDeleteAction.do in web.xml the problem went away. You may be facing a similar issue.
Ugh. It should say:
type = "my.DeleteAction"