I’m running Eclipse Helios Service Release 1, with Tomcat 7.0.12 in Linux Ubuntu Natty Narwhal. I’ve been happily hot re-deploying my webapp until it stopped working for apparently no reason. The following exception is displayed: In Servers tab I’ve “Tomcat v7.0 Server at localhost [Started,Synchronized] My project appears as a child of Tomcat v7.0 Server In Properties, Java Build Path,