TypeError: Cannot read property 'encode' of undefined

[marcosc90]

When using socket.io-redis@5.0.1 I get the following error:

TypeError: Cannot read property 'encode' of undefined
    at Redis.Adapter.broadcast (/var/www/test/node_modules/socket.io-redis/node_modules/socket.io-adapter/index.js:136:15)
    at Redis.broadcast (/var/www/test/node_modules/socket.io-redis/index.js:414:33)
    at Namespace.emit (/var/www/test/node_modules/socket.io/lib/namespace.js:222:18)
    at EventEmitter.emitter.on.data (/var/www/test/private/test.js:121:16)
    at emitOne (events.js:96:13)
    at EventEmitter.emit (events.js:191:7)
    at Test.handleResponse (/var/www/test/private/test.js:286:17)
    at EventRequest.request.on (/var/www/test/private/test.js:198:9)
    at emitOne (events.js:96:13)
    at EventRequest.emit (events.js:191:7)

My code:

const socketio = require('socket.io');
const express = require('express');

const app = express();
const server = require('http').Server(app);

const io = socketio(server);
const redis = require('socket.io-redis');

server.listen(3002);

io.adapter(redis({ host: 'localhost', port: 6379 }));
io.on('connection', (socket) =>{
	const room = 'test';

	socket.join(room);

	socket.on('chat message', () => {
		console.log("message");
		io.to(room).emit('chat message', 'hi');  //This is where the error starts.
	});
});

I fixed it changing this line:

this.encoder = nsp.server.encoder;

with:

this.encoder = nsp.adapter.encoder;

in socket.io-redis/node_modules/socket.io-adapter/index.js

But I really don't think I should be doing that.

Info:

OS: Ubuntu 16.04 64-bit

├─┬ socket.io@1.7.3
│ └── socket.io-adapter@0.5.0
└─┬ socket.io-redis@5.0.1
└── socket.io-adapter@1.1.0

[johnfrades]

I'm having the same issue

**Update

Holy cow, i tried your solution and it work. How come you know what to change in that index.js. I know the error is pointing to that but how did you come up by changing the "server" to "adapter"?

Cheers

[darrachequesne]

As noted in the release note, socket.io-redis@5.0.1 is not compatible with socket.io@1.x.

Related: socketio/socket.io-adapter#47

[marcosc90]

@darrachequesne Thanks, my bad for not reading the release notes.
In any case I would recommend showing a warning if socket.io version is lower than 2.

[olegmdev]

I have this issue with socket.io@2.0.1.

@marcosc90 's solution helped, but it's not acceptable to make such changes

[darrachequesne]

but it's not acceptable to make such changes

@olegmdev May I ask what you do mean?

[olegmdev]

I meant to make changes inside dependent node_modules sources, nevermind.

Rolling back to socket.io-redis@5.0.0 (from 5.0.1) did the trick.

[felipemarques]

Iam rolling back to socket.io-redis@5.0.0 likve @olegmdev mentioned, but not work

[felipemarques]

This is my package.json

{
"name": "newpubsub",
"version": "0.0.0",
"private": true,
"scripts": {
"start": "NODE_ENV=production node ./bin/www",
"start:dev": "NODE_ENV=development node ./bin/www"
},
"dependencies": {
"bcrypt": "^1.0.3",
"body-parser": "~1.14.1",
"connect-redis": "^3.0.0",
"cookie-parser": "~1.4.0",
"debug": "~2.2.0",
"ejs": "~2.3.1",
"express": "~4.13.3",
"express-session": "^1.11.1",
"express-useragent": "^1.0.8",
"faker": "^4.1.0",
"hiredis": "^0.4.1",
"lodash": "^4.17.4",
"md5": "^2.2.1",
"moment": "^2.17.1",
"morgan": "~1.6.1",
"mysql": "mysqljs/mysql",
"redis": "^2.1.0",
"request": "^2.81.0",
"serve-favicon": "~2.3.0",
"session.socket.io": "^0.2.0",
"socket.io": "^1.3.5",
"socket.io-emitter": "^3.1.1",
"socket.io-express-session": "^0.1.3",
"socket.io-redis": "5.0.0",
"sticky-session": "^1.0.1",
"uniqid": "^4.1.1"
},
"devDependencies": {
"socket-stress-test": "^0.1.0",
"socket.io-client": "^2.0.3"
}
}

[felipemarques]

Worked only when i update socket.io to 2.x

[darrachequesne]

@felipemarques please see https://github.com/socketio/socket.io-redis/releases/tag/5.0.0.

[jonathan-casarrubias]

I'm having this problem, I'm using socket.io 2.1.1 and socket.io-redis 5.2.0

any ideas?