1. Exit eclipse
2. Go to [project directory]/.metadata/.plugins/org.eclipse.core.runtime
3. Remove the two files org.eclipse.wst.server.core.prefs and org.eclipse.jst.server.tomcat.core.prefs
4. Restart eclipse
1. Exit eclipse
2. Go to [project directory]/.metadata/.plugins/org.eclipse.core.runtime
3. Remove the two files org.eclipse.wst.server.core.prefs and org.eclipse.jst.server.tomcat.core.prefs
4. Restart eclipse