Error: timeout reached while waiting for sockets response

[hamitsaka]

socket.io@3.0.3
socket.io-redis@6.0.1

Calls made to the adapter methods as follows:
`
const sockets = await io.of('/').adapter.sockets();
console.log(sockets); // a Set containing all the connected socket ids

// this method is also exposed by the Server instance
const sockets = io.in('room3').allSockets();
console.log(sockets); // a Set containing the socket ids in 'room3'
`

Causes the below exception being thrown:
(node:20818) UnhandledPromiseRejectionWarning: Error: timeout reached while waiting for sockets response at Timeout._onTimeout (/var/app/node_modules/socket.io-redis/dist/index.js:286:28) at listOnTimeout (internal/timers.js:549:17) at processTimers (internal/timers.js:492:7) (node:20818) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag--unhandled-rejections=strict(see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 4)

[cesco69]

same error

[alkalox]

Getting this error. Any clue for fixes?

[unicornsoftwareinc]

I am having the same issue and I'm at a loss on how to stop it.

Error: timeout reached while waiting for sockets response
at Timeout._onTimeout (/app/node_modules/@socket.io/redis-adapter/dist/index.js

This is with:
"socket.io": "^4.4.0"
"@socket.io/redis-adapter": "^7.0.1"

I've pretty much wrapped everything in try/catch blocks and .catch() where promises are involved. Really need a solution here.

[andreuka]

getting this error randomly

[lehno]

Same error using ioredis

[willjk]

This happened to me when the connection of the socket server loses connection to the redis server. We had it happen when our redis server went down and we tried to send things via redis

[gabrielgrijincu]

Happening to me too.

Using ioredis for connection and fetchSockets instead of allSockets due to the deprecation of allSockets sice socket.io@4.5.3, but the result is the same.

Error: timeout reached while waiting for fetchSockets response
    at Timeout._onTimeout (/node_modules/@socket.io/redis-adapter/dist/index.js:559:28)
    at listOnTimeout (node:internal/timers:569:17)
    at process.processTimers (node:internal/timers:512:7)

[hysapp]

Same problem when the number of clients is large.

[italosvieira]

Same error here. Looking at the lib seems like the error is generated on this line:

socket.io-redis-adapter/lib/index.ts

Line 759 in ef5f0da

new Error("timeout reached while waiting for fetchSockets response")

@darrachequesne Can you help us? What is the logic of this if that generates the error?

    if (this.requests.has(requestId)) {
      reject(
        new Error("timeout reached while waiting for fetchSockets response")
      );
      this.requests.delete(requestId);
    }

[cody-evaluate]

I am seeing this issue as well intermittently

[cody-evaluate]

seems to happen when numSub and msgCount are off by 1

{ type: 5, numSub: 3, resolve: [Function (anonymous)], timeout: Timeout { _idleTimeout: 5000, _idlePrev: [TimersList], _idleNext: [Timeout], _idleStart: 5650, _onTimeout: [Function (anonymous)], _timerArgs: undefined, _repeat: null, _destroyed: false, [Symbol(refed)]: true, [Symbol(kHasPrimitive)]: false, [Symbol(asyncId)]: 391, [Symbol(triggerId)]: 0 }, msgCount: 2, sockets: [] }

[introspection3]

me too

[alirafiq-js]

allSockets

allSockets works for me, my app deployed on k8, on single instance it was fine, fetchsocket timeout on multiple instances

[HannaSamia]

anyone found a solution??

[darrachequesne]

The timeout might happen if the requesting server does not receive enough responses from the other servers in the cluster.

Catching the exception and retrying upon failure should account for those temporary issues:

async function fetchSockets() {
  for (let i = 0; i < MAX_RETRIES; i++) {
    try {
      return await io.in("room1").fetchSockets();
    } catch (e) {
      // timeout error
    }
  }
  throw "too many retries";
}