Periodic crashes with TypeError: Uncaught, unspecified "error" event.

[JohnMcLear]

Pretty much impossible to debug crashes periodically happens(every hour or so) under slight load(40 users, 3% cpu, 3% memory) on one of my hosts but there are no steps to replicate consistently.

Plenty of free system resources, it's a CentOS VM and this crash happens periodically.. I have tried turning off plugins etc.

Crash seems to be coming from engine.io..

I can't replicate on any local instances.. Any tips anyone?

[ERROR] console - TypeError: Uncaught, unspecified "error" event.
    at TypeError (<anonymous>)
    at WebSocket.EventEmitter.emit (events.js:74:15)
    at Receiver.onerror (/home/etherpad-lite/src/node_modules/socket.io/node_modules/engine.io/node_modules/ws/lib/WebSocket.js:775:10)
    at Receiver.error (/home/etherpad-lite/src/node_modules/socket.io/node_modules/engine.io/node_modules/ws/lib/Receiver.hixie.js:153:8)
    at doAdd (/home/etherpad-lite/src/node_modules/socket.io/node_modules/engine.io/node_modules/ws/lib/Receiver.hixie.js:61:14)
    at Receiver.add (/home/etherpad-lite/src/node_modules/socket.io/node_modules/engine.io/node_modules/ws/lib/Receiver.hixie.js:104:22)
    at CleartextStream.firstHandler (/home/etherpad-lite/src/node_modules/socket.io/node_modules/engine.io/node_modules/ws/lib/WebSocket.js:718:22)
    at CleartextStream.EventEmitter.emit (events.js:95:17)
    at CleartextStream.<anonymous> (_stream_readable.js:746:14)
    at CleartextStream.EventEmitter.emit (events.js:92:17)

[JohnMcLear]

Updating to Node 12+ fixed this for me.. Spooooooky :|

[kingmook]

I've been receiving this exact error under very similar circumstances (CentOS, low load and users) since upgrading to the most recent develop very of etherpad (cloned down on Oct 28th).

I was running node 4.2.1 but downgraded to 12.7 following your 12+ response. Doesn't seem to have helped.

Happy to give more details or create a separate issue if appropriate. Wondering if you ever got to the bottom of this one?

[webzwo0i]

Can you provide a new stacktrace and the corresponding versions in socket.io/package.json socket.io/node_modules/engine.io/package.json socket.io/node_modules/engine.io/node_modules/ws/package.json

[kingmook]

Sorry for the delay webz. Stack trace and versions as requested:

[ERROR] console - TypeError: Uncaught, unspecified "error" event.
at TypeError (<anonymous>)
at WebSocket.EventEmitter.emit (events.js:74:15)
at Receiver.onerror (/opt/etherpad/src/node_modules/socket.io/node_modules/engine.io/node_modules/ws/lib/WebSocket.js:775:10)
at Receiver.error (/opt/etherpad/src/node_modules/socket.io/node_modules/engine.io/node_modules/ws/lib/Receiver.hixie.js:153:8)
at doAdd (/opt/etherpad/src/node_modules/socket.io/node_modules/engine.io/node_modules/ws/lib/Receiver.hixie.js:61:14)
at Receiver.add (/opt/etherpad/src/node_modules/socket.io/node_modules/engine.io/node_modules/ws/lib/Receiver.hixie.js:104:22)
at CleartextStream.firstHandler (/opt/etherpad/src/node_modules/socket.io/node_modules/engine.io/node_modules/ws/lib/WebSocket.js:718:22)
at CleartextStream.EventEmitter.emit (events.js:95:17)
at CleartextStream.<anonymous> (_stream_readable.js:746:14)
at CleartextStream.EventEmitter.emit (events.js:92:17)

socket.io/package.json - version 1.3.5

socket.io/node_modules/engine.io/package.json - version 1.5.1

socket.io/node_modules/engine.io/node_modules/ws/package.json - version 0.5.0

[kingmook]

Still getting this one as of today. Has upgrading to a newer version of the code base or node saved others?

[JohnMcLear]

Modern code is stable.