Although the "validate" method in the above class is getting called properly, the desired action "pcFlow" is not getting invoked, which I know because nothing gets logged from teh debug statement. Any ideas what basic thing I'm missing?
Please UseCodeTags. (Also, minor nit--you don't have a servlet, you have an action.)
How would S2 know to call that method? The default method is execute(). If you want to call a specific, non-default method then you need to specify that in the action mapping via the "method" attribute.