gulp - 错误events.js：72 throw er; //未处理的'错误'事件

Question

当我试图运行gulp时，我正在接受以下问题。 我正在使用laravel 5.2和gulp 3.9.1

[16:40:58] Using gulpfile /var/www/html/embassy/embassyv1/gulpfile.js
[16:40:58] Starting 'build'...
[16:40:58] Finished 'build' after 14 ms
[16:40:58] Starting 'serve'...
[16:40:58] Finished 'serve' after 10 ms
[16:40:58] Starting 'default'...
[16:40:58] Finished 'default' after 15 μs

events.js:72 throw er; // Unhandled 'error' event  
            ^
Error: EPERM, chmod '/var/www/html/embassy/embassyv1'
embassy@EMB-NEW-VM-UBUNTU:/var/www/html/embassy/embassyv1$ [Tue Feb 21 16:40:58 2017] Failed to listen on 127.0.0.1:8000 (reason: Address already in use)