各位 ：Express4.x 启动server报错。麻烦有经验的帮忙看看 什么问题

报错如下：

events.js:72
        throw er; // Unhandled 'error' event
              ^
Error: socket hang up
at createHangUpError (http.js:1472:15)
at Socket.socketOnEnd [as onend] (http.js:1568:23)
at Socket.g (events.js:180:16)
at Socket.emit (events.js:117:20)
at _stream_readable.js:929:16
at process._tickCallback (node.js:419:13)
Program node d:\WWWBOX\\server.js exited with code 8