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TypeError: Cannot read properties of undefined (reading 'id') when using createAdapter() from @socket.io/cluster-adapter #5337

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michioxd asked this question in Q&A
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Hi, I'm trying to set up Socket.IO with cluster support using PM2, following this docs.

Here's my code:

import { createAdapter } from "@socket.io/redis-adapter";
import { createAdapter as createClusterAdapter } from "@socket.io/cluster-adapter";
import { setupWorker } from "@socket.io/sticky";
const app = express();
export const server = http.createServer(app);
export const io = new Server(server, {
 transports: ['websocket', 'polling'],
 adapter: createAdapter(redisClient, redisSubClient)
});
io.adapter(createClusterAdapter()); // src/server.ts:76:4
setupWorker(io);

While I try to run my code, it showing this error

TypeError: Cannot read properties of undefined (reading 'id')
 at new ClusterAdapter (/home/michioxd/backend/node_modules/.pnpm/@socket.io+cluster-adapter@0.2.2_socket.io-adapter@2.5.5/node_modules/@socket.io/cluster-adapter/dist/index.js:61:34)
 at new <anonymous> (/home/michioxd/backend/node_modules/.pnpm/@socket.io+cluster-adapter@0.2.2_socket.io-adapter@2.5.5/node_modules/@socket.io/cluster-adapter/dist/index.js:40:16)
 at Namespace._initAdapter (/home/michioxd/backend/node_modules/.pnpm/socket.io@4.8.1/node_modules/socket.io/dist/namespace.js:99:24)
 at Server.adapter (/home/michioxd/backend/node_modules/.pnpm/socket.io@4.8.1/node_modules/socket.io/dist/index.js:188:17)
 at file:///home/michioxd/src/server.ts:76:4
 at ModuleJob.run (node:internal/modules/esm/module_job:274:25)
 at onImport.tracePromise.__proto__ (node:internal/modules/esm/loader:644:26)

Command I used to run in PM2:

pm2 start index.js -i max

Thanks!

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