Error: listen EADDRINUSE :::8080 when no process is using 8080 port

Question

I've been using Node over 2 years, never seen this case before. when I run lsof -i tcp:8080 ,There's literally nothing used in 8080 port. I also tried killall -9 node and sudo fuser -k 8080/tcp but the stil same error.

but when I run my Node appIt occurs the error. No idea why this happens. any Ideas?

app.js

const app = new Koa()
const port = process.env.PORT || 8080
const dist = isProduction() ? __dirname + '/../views' : __dirname + '/views/'
const bpOption = {
    fields: 'body',
    IncomingForm: form
}

console.log("SIBAL")

app.keys = ['secret', 'key'];
require('./util/passport')

app
    .use(logger())
    .use(serve(dist))
    .use(session({}, app))
    .use(bodyParser(bpOption))
    .use(passport.initialize())
    .use(passport.session())
    .use(views(dist, { extension: 'pug'}))
    .use(routes())

let server = app.listen(port)

Answer 1

You can try this:

sudo kill $(sudo lsof -t -i:8080)