PM2, Redis, Express, Sticky Sessions Error: not worker

[vito-vanhecke]

Hi all,

I am trying to make an application that scales over multiple CPU's using PM2 and Scales over multiple servers using the redis-streams-adapter.

Whenever I try to start the app in cluster mode I get the following error in PM2 logs:

The code looks as follows (index.js):

import { createAdapter } from "@socket.io/redis-streams-adapter";
import { setupWorker } from "@socket.io/sticky";
import { eiows } from 'eiows';
import express from "express";
import { createServer } from "http";
import { createClient } from "redis";
import { Server } from "socket.io";

const app = express();
app.use(express.json());
app.set('trust proxy', true)

const httpServer = createServer(app);
const client = createClient({ url: "redis://localhost:6379", enable_offline_queue: false });
await client.connect()

const io = new Server(httpServer, {
  wsEngine: eiows.Server,
  transports: ["websocket", "polling"],
});

io.adapter(createAdapter(client));

setupWorker(io);

And my PM2 config file (ecosystem.config.js):

module.exports = {
  apps: [
    {
      name: "socket",
      script: "src/index.js",
      instances: "max",
      max_memory_restart: "300M",

      // Logging
      out_file: "./logs/out.log",
      error_file: "./logs/error.log",
      merge_logs: true,
      log_date_format: "DD-MM HH:mm:ss",

      // Env Specific Config
      env_production: {
        NODE_ENV: "production",
        PORT: 3000,
        exec_mode: "cluster",
      },
      env_development: {
        NODE_ENV: "development",
        PORT: 3000,
        watch: true,
        watch_delay: 3000,
        ignore_watch: [
          "./node_modules",
          "./app/views",
          "./public",
          "./.DS_Store",
          "./package.json",
          "./yarn.lock",
          "./samples",
          "./.git",
          "./logs"
        ],
      },
    },
  ],
};

The error just happens as soon as I start the process with pm2 start...