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From Mladen Adamović <>
Subject web.xml and @WebServlet priority when more rules match
Date Wed, 12 Oct 2016 07:02:41 GMT
Lets assume that web.xml has a rule


While class Two.class has an annotation:

    @WebServlet(name = "Two", urlPatterns = {"/something/er*"})

>From the Servlet 3.0 specification

8.2.3. (point 4). `The web.xml of the web application has the highest
precedence when resolving conflicts between the web.xml, web-fragment.xml
and annotations.`

While 12.2 states: The container will recursively try to match the longest
path-prefix. This is done by stepping down the path tree a directory at a
time, using the ’/’ character as a path separator. The longest match
determines the servlet selected.

So for the request /something/error Tomcat will choose Two.class?

And more general, in the case there are both annotation and web.xml rule
with the same prefix length, it will choose a first occurrence in web.xml?

If no one knows the answers but knows where to look in the source code,
that could be beneficial as well.


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