Verifier error on filters during Glassfish deployment

Question

Trying to deploy a couple of simple filter classes like this:
public class MyFilter implements FilterI get this error for every single filter when deploying the WAR in Glassfish with the verifier option checked:
Error: Servlet Class [com.myPackage.MyFilter] does not directly or indirectly implement javax.servlet.Servlet
If I do not pass through the verifier the deployment is OK and the filters seem to run as expected.
thanks for any suggestion,
giovanni

Answer 1

when your class does implement a Filter interface the container
must recognize it as a servletReally? I never heard nor read this before.
Here is an excerpt of: http://www.servlets.com/soapbox/servlet23.html
Filters are not servlets; they do not actually create a response. They are preprocessors of the request before it reaches a servlet, and/or postprocessors of the response leaving a servlet. In a sense, filters are a mature version of the old "servlet chaining" concept.
Maybe you are used to the pre-servlet 2.3 specs?