13-dic-2011 17.00.36 org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in producti
This might be late but for the benefit of the those who might encounter the same problem in the future, I'll share what I experienced.
I got this problem after I deleted the WebContent folder of the Dynamic Web Project I just created in place of webapp folder which is the standard folder of my company. I found out that, in Project Properties > Deployment Assembly, WebContent folder is still used as the root of the web application (Deploy Path : "/"). Thus, Eclipse doesn't copy the project to .metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps because the root specified in Deployment Assembly does not exist anymore.
I fixed it by editing that entry then correcting it with the folder I am using in place of the default WebContent (the webapp folder)