getting the events.js:72 throw er; // Unhandled 'error' event when starting server.js

[kodemafia]

user@mediasrvr:~/kurento-tutorial-node/kurento-group-call/example$ node server.js express-session deprecated undefined resave option; provide resave option server.js:55:9 express-session deprecated undefined saveUninitialized option; provide saveUninitialized option server.js:55:9

events.js:72 throw er; // Unhandled 'error' event ^ Error: listen EADDRINUSE at errnoException (net.js:905:11) at Server._listen2 (net.js:1043:14) at listen (net.js:1065:10) at Server.listen (net.js:1139:5) at EventEmitter.app.listen (/home/user/kurento-tutorial-node/kurento-group-call/example/node_modules/express/lib/application.js:595:24) at Object. (/home/user/kurento-tutorial-node/kurento-group-call/example/server.js:127:18) at Module._compile (module.js:456:26) at Object.Module._extensions..js (module.js:474:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:312:12) user@mediasrvr:~/kurento-tutorial-node/kurento-group-call/example$