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

I solved this by deleting the working directory of my Tomcat server, cleaning, and republishing. For reference, my working directory was:

{eclipse-workspace}/.metadata/.plugins/org.eclipse.wst.server.core

And my server was tmp0. I've seen other people have servers under different directories. I found this path after double clicking on the Tomcat server in eclipse. That brings up a configuration menu and it lists the "Server Location".