Suggestion: change default backend port?

Request for enhancement
1

Running cd openvidu-tutorials/openvidu-basic-node && node index.js gives following error:

Error: listen EADDRINUSE: address already in use :::5000
    at Server.setupListenHandle [as _listen2] (node:net:1372:16)
    at listenInCluster (node:net:1420:12)
    at Server.listen (node:net:1508:7)
    at Object.<anonymous> (/Users/andrey/Sites/openvidu-tutorials/openvidu-basic-node/index.js:35:8)
    at Module._compile (node:internal/modules/cjs/loader:1105:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1159:10)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:77:12)
    at node:internal/main/run_main_module:17:47 {
  code: 'EADDRINUSE',
  errno: -48,
  syscall: 'listen',
  address: '::',
  port: 5000
}

The reason is – port 5000 is currently used by system processes in macOS:

$ sudo lsof -i :5000

COMMAND   PID   USER   FD   TYPE            DEVICE SIZE/OFF NODE NAME
ControlCe 462 andrey    7u  IPv4 0x345fc02711044d7      0t0  TCP *:commplex-main (LISTEN)
ControlCe 462 andrey    8u  IPv6 0x345fbfda43ba22f      0t0  TCP *:commplex-main (LISTEN)

$ ps 462

  PID   TT  STAT      TIME COMMAND
  462   ??  S     59:55.47 /System/Library/CoreServices/ControlCenter.app/Contents/MacOS/ControlCenter

Currently, the first step developing with Openvidu on Mac is always – changing default backend port, e.g. to 5001. Other option is to turn off that service in macOS system settings (as described in this StackExchange post), which is also not obvious.

So maybe it’s worth either to change default port in backend apps in Openvidu, or add a short guide to the docs or FAQ?

2

Hi, every basic server sample is listening to a SERVER_PORT env variable so you can change it on the fly.
export SERVER_PORT=5001 && node index.js