Resolution: Engine Daemons may have issues connecting to Managers, with a file not found exception on the URL http://server:port/livecluster/director/PublicEngineDaemonChannel.
Ensure that the environment variable http_proxy is not set. It is sometimes set to access the internet with a proxy from programs like wget, lynx, or firefox. Java also uses this proxy setting, and this will cause Engines to attempt to contact the Manager using the proxy, often resulting in a File not found exception on the URL http://server:port/livecluster/director/PublicEngineDaemonChannel.