Tomcat v7.0 stopped to run my project at localhost

Question

I was working on my web application in eclipse with Tomcat v7.0, and everything was fine.
But today suddenly I can\'t run my poject on server anymore.
I do as usual:

Answer 1

Recheck your web.XML file.

This error just because of web.xml configuration or sometime need to clean & build whole project from

Project>clean

Server clean

Server>right click>delete

Then

Setup new server