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you can still use legacy version of web.xml.
But you won't be able to use new features that servlet 3.0 spec brings.
but changing web.xml to be 3.0 complient should be simple change.
In short it is recomended so you can gain new functionalites but not required
Thanks. That makes sense. would you happen to know of any helpful documentation that illustrates the changes to the web.xml from 2.4 to 3.0. Or if i dont intend to use any new features of servlet 3.0, is it just a matter of chaging the version and schema location ?