Node.JS multiple new Class only last executed (http & socket.io-client) - node.js

Question

First sorry for my bad english.
I tried connect to server using http token authentication with socket.io as exchange data. When socket.io got an error then request token by http and try to connect again.
I put the connection function in the class then call it from main program. My problem is when I create multiple client why only last work, here my code
call the class
const SocketHttpClient = require('./class/socket-http-client')
let ioClient_1 = new SocketHttpClient('localhost', 3001, 'admin', 'admin', '/login')
let ioClient_2 = new SocketHttpClient('localhost', 3002, 'admin', 'admin', '/login')
let ioClient_3 = new SocketHttpClient('localhost', 3003, 'admin', 'admin', '/login')
connection class
// =================================================================================================
// INCLUDE LIBRARY
// =================================================================================================
const ioClient = require('socket.io-client')
const http = require('http')
const cookie = require('cookie')
const log = require('./log-custom')
// =================================================================================================
// VARIABLE
// =================================================================================================
let data
let httpOption
ioOption = {
transportOptions: {
polling: {
extraHeaders: {
Cookie: 'hello=world'
}
}
}
}
module.exports = class Socket {
constructor(ioHostname, ioPort, httpUsername, httpPassword, loginPath) {
data = {
username: httpUsername,
password: httpPassword
}
data = JSON.stringify(data)
httpOption = {
hostname: ioHostname,
port: ioPort,
path: loginPath,
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Content-Length': data.length
}
}
log(`Connecting to "${httpOption.hostname}:${httpOption.port}"`)
this.io = ioClient(`http://${httpOption.hostname}:${httpOption.port}`, ioOption)
this.io.on('connect', () => {
log(`Connected to socket "${httpOption.hostname}:${httpOption.port}"`)
})
this.io.on('disconnect', () => {
log(`Disconnected to socket "${httpOption.hostname}:${httpOption.port}"`)
log('Reconnecting...')
})
this.io.on('error', () => {
console.log(`error: ${httpOption.hostname}:${httpOption.port}`)
// When error then try to reconnect...
setTimeout(() => {
this.io.disconnect()
this.io.close()
this.req = http.request(httpOption, res => {
this.c = cookie.parse(res.headers['set-cookie'][0])
ioOption.transportOptions.polling.extraHeaders.Cookie = `sid=${this.c.sid}`
this.io.io.opts.query = ioOption
})
this.req.write(data)
this.req.end()
this.req.on('error', err => {
})
// delay to reconnect
setTimeout(() => {
this.io.connect()
}, 1000)
}, 1000)
})
}
}
the result:
ioClient_1 => not working
ioClient_2 => not working
ioClient_3 => working fine as expected
Where I doing wrong here? Need advice from you guys. Thank you in advanced.