sticky-session: worker died error TypeError: Cannot call method 'removeListener' of undefined

[Alexandrrr]

Hello.
I had a problem with my project. If I hold down the button F5 to reload my page, which is rendered by GET request, nodeserver is down with exception:
sticky-session: worker died
error TypeError: Cannot call method 'removeListener' of undefined

CallStack:
at httpSocketSetup (http.js:1859:10)
at Server.connectionListener (http.js:1928:3)
at Server.emit (events.js:95:17)
at process. (/var/www/producer/data/www/producer.lifeha.ru/project/node_modules/sticky-session/lib/sticky-session.js:63:14)
at process.emit (events.js:117:20)
at handleMessage (child_process.js:322:10)
at Pipe.channel.onread (child_process.js:349:11)
sticky-session: worker died

[liebo]

the same problem when high concurrent connection number

[triitvn]

@liebo @Alexandrrr I have the same issue. I use sitcky session with socket.io. How can we setup a high-traffic websocket server?

Here is my app:

(function() {
  var admSecret, os, redis, socketPort, sticky;

  os = require('os');

  redis = require('socket.io-redis');

  sticky = require('sticky-session');

  socketPort = 3000;

  sticky(function() {
    var handler, importantNotice, io, server;

    handler = function(req, res) {
      res.writeHead(200);
      return res.end('vgws: ' + process.pid);
    };

    server = require('http').createServer(handler);

    io = require('socket.io')(server);

    io.adapter(redis({
      host: 'localhost',
      port: 6379
    }));

    io.on('connection', function(socket) {
      socket.on('important-notice', function() {
        return socket.emit('important-notice', importantNotice);
      });
    });
    return server;
  }).listen(socketPort, function() {
    console.log(process.pid);
  });

}).call(this);

Error in high traffic period

http.js:1864
  socket.removeListener('drain', ondrain);
         ^
TypeError: Cannot call method 'removeListener' of undefined
    at httpSocketSetup (http.js:1864:10)
    at Server.connectionListener (http.js:1933:3)
    at Server.emit (events.js:95:17)
    at process.<anonymous> (/home/node_modules/sticky-session/lib/sticky-session.js:63:14)
    at process.emit (events.js:117:20)
    at handleMessage (child_process.js:322:10)
    at Pipe.channel.onread (child_process.js:349:11)
sticky-session: worker died
11429

http.js:1864
  socket.removeListener('drain', ondrain);
         ^
TypeError: Cannot call method 'removeListener' of undefined
    at httpSocketSetup (http.js:1864:10)
    at Server.connectionListener (http.js:1933:3)
    at Server.emit (events.js:95:17)
    at process.<anonymous> (/home/node_modules/sticky-session/lib/sticky-session.js:63:14)
    at process.emit (events.js:117:20)
    at handleMessage (child_process.js:322:10)
    at Pipe.channel.onread (child_process.js:349:11)
sticky-session: worker died
11534
11536

events.js:72
        throw er; // Unhandled 'error' event
              ^
Error: read ECONNRESET
    at errnoException (net.js:905:11)
    at TCP.onread (net.js:559:19)
4 May 14:55:15 - [nodemon] app crashed - waiting for file changes before starting..

[Mad-Head]

Cause of error:
You tried to "server.emit ('connection', socket);" in sticky-session.js: 63 line, where: variable "socket" is undefined.

Solution: add a validation variable.

For example:

    process.on('message', function(msg, socket) {
      if (msg !== 'sticky-session:connection') return;
      if (socket) {
        server.emit('connection', socket);
      } else {
        console.log('Warning: socket is not defined');
      }
    });

[triitvn]

Thank you @Mad-Head so much.