Setting a timer for a long period of time warning

[rickardinho]

Hi, I'm getting the following warnings when using socket.io with my React Native project.

I'm on React Native version 0.44.3
and socket.io-client: 1.5.1

Any ideas of how to solve or is this a bug? It seems to be slowing my whole app down significantly, as well as producing lots of console warnings.

Here is the error in the console:

Setting a timer for a long period of time, i.e. multiple minutes, is a performance and correctness issue on Android as it keeps the timer module awake, and timers can only be called when the app is in the foreground. See facebook/react-native#12981 for more info.
(Saw setTimeout with duration 85000ms)
console.warn @ index.android.bundle:40843
setTimeout @ index.android.bundle:3412
Socket.onHeartbeat @ index.android.bundle:72517
Emitter.emit @ index.android.bundle:74290
Socket.onPacket @ index.android.bundle:72470
(anonymous) @ index.android.bundle:72336
Emitter.emit @ index.android.bundle:74290
Transport.onPacket @ index.android.bundle:73298
Transport.onData @ index.android.bundle:73294
ws.onmessage @ index.android.bundle:74952
dispatchEvent @ index.android.bundle:13268
(anonymous) @ index.android.bundle:12969
emit @ index.android.bundle:3853
__callFunction @ index.android.bundle:2092
(anonymous) @ index.android.bundle:1950
__guard @ index.android.bundle:2064
callFunctionReturnFlushedQueue @ index.android.bundle:1949
(anonymous) @ debuggerWorker.js:71
index.android.bundle:40843 Remote debugger is in a background tab which may cause apps to perform slowly. Fix this by foregrounding the tab (or opening it in a separate window).
console.warn @ index.android.bundle:40843
(anonymous) @ debuggerWorker.js:25
(anonymous) @ debuggerWorker.js:53

Thanks

[KingCosmic]

add {pingTimeout: 30000}to where you tie socket.io to your http server
example:

var io = socketio(server, {pingTimeout: 30000});
```  or some other amount it defaults to 85000 which is more then RN likes 

[ikhsanalatsary]

@KingCosmic not work for me

[KingCosmic]

Is your issue the same as the o e here? @ikgsanalatsary

[juergengunz]

does not work for me either

[matthieupinte]

Same warning... but not working for me either @KingCosmic :/
Thanks for your help ;)

[imdadahad]

Facing the same issue, any news?

[KingCosmic]

did you try configuring socket timeout

[matthieupinte]

@KingCosmic tried with { pingTimeout: 30000 }, { timeout: 30000 } as defined in doc. Do I have to do it server-side or client-side ?

[ikhsanalatsary]

@KingCosmic I tried both in server side & RN. But the yellow warning still show

[KingCosmic]

Why am I the only one be here ;-; @ikhsanalatsary what is your error exactly and @matthieupinte server side should be fine how are you connecting socket.io to your http server?

[ikhsanalatsary]

and in my React native app:

dependency:
"react": "16.0.0-alpha.12",
"react-native": "0.48.4",
"socket.io-client": "2.0.4",

server dependency:
"socket.io": "~2.0.3",

[KingCosmic]

@ikhsanalatsary set the ping timeout server side not client side and it should be fixed

[KingCosmic]

That's what fixed it for me anyways

[hansinhu]

does not work

[aprilmintacpineda]

on the server side do this:

const io = socketIO(server, {
  pingTimeout: 30000,
  pingInterval: 30000
});

[jussirantala]

(console as any).ignoredYellowBox = [ 'Setting a timer' ];

[clayrisser]

This fixes the yellow box and the console log. It even fixes it for Expo.

Simply place the following script at the beginning of your codebase.

import { YellowBox } from 'react-native';
import _ from 'lodash';

YellowBox.ignoreWarnings(['Setting a timer']);
const _console = _.clone(console);
console.warn = message => {
  if (message.indexOf('Setting a timer') <= -1) {
    _console.warn(message);
  }
};

[clayrisser]

I've encapsulated the previous logic into two npm modules, one for general node/javascript and one for react-native.

The react-native module is compatible with expo apps.

https://github.com/jamrizzi/ignore-warnings
https://www.npmjs.com/package/ignore-warnings
https://github.com/jamrizzi/react-native-ignore-warnings
https://www.npmjs.com/package/react-native-ignore-warnings

You would use it the following way . . .

import ignoreWarnings from 'react-native-ignore-warnings';
ignoreWarnings('Setting a timer');

[darrachequesne]

As noted above, I think setting pingTimeout and pingInterval (which currently default to 60000 and 25000) should fix the issue.

[KingCosmic]

after some more looking around, pingTimeout fixed it on iOS but on android it still showed up but as said above pingInterval might fix that

[giantss]

@ikhsanalatsary Hello, Can it be used in the react native project? I plan to use it. Please advise.

[clayrisser]

@giantss can what be used in the react native project?

[giantss]

@jamrizzi socket.io

[ikhsanalatsary]

Its works after I update socket.io in the server and did

const io = socketIO(server, {
 pingTimeout: 30000,
 pingInterval: 30000
});

As @aprilmintacpineda mentioned

[giantss]

@ikhsanalatsary Are you using socket.io-client in react native?

[ikhsanalatsary]

@giantss yes

[giantss]

@ikhsanalatsary thanks, Could you provide some of the core client-side initialization code? Have you used webscoket?

[ikhsanalatsary]

const socket = io(api.BASE_API_URL, {
  transports: ['websocket'] // you need to explicitly tell it to use websockets
})

class RootContainer extends PureComponent<Props> {
  // class body
}

put it outside on your root component

[giantss]

Your reply is very helpful to me, thank you very much.

[giantss]

@ikhsanalatsary Hello, do you have encountered the following warning in the integration process?

Setting a timer for a long period of time, i.e. multiple minutes, is a performance and correctness issue on Android as it keeps the timer module awake, and timers can only be called when the app is in the foreground. See https://github.com/facebook/react-native/issues/12981 for more info.
(Saw setTimeout with duration 85000ms)

How do you solve this warning?

[clayrisser]

@giantss I'm not sure what the real solution is yet, but you can at least hide the error for now. Refer to my previous comments.

[giantss]

@jamrizzi Thank you for your answer, I have seen this solution before, I do not know what better solution

[clayrisser]

@giantss, yeah I wish I had a better answer.

[darrachequesne]

@jamrizzi @giantss did you try the answer from @aprilmintacpineda above?

const io = socketIO(server, {
  pingTimeout: 5000 // this will be the default starting version 2.1.0 (currently it's 60000)
});

[giantss]

@darrachequesne I tried this solution but it has no effect. @ikhsanalatsary He also encountered this warning. I don't know if he has solved it perfectly.

[aprilmintacpineda]

@giantss That's weird. Can you paste the code of your server.js here? at least the ones relevant to socket.io. That way we can help you more.

[giantss]

@aprilmintacpineda Thank you for your advice.This warning appears in the react native app.

[aprilmintacpineda]

@giantss Yes, it does. Please post the server.js. Basically, the reason for the warning is that socket.io timer defaults to 80000 (I think, correct me if I'm wrong), react-native hates this. This is not an issue with socket.io-client, which is in the frontend, but rather this is an issue with socket.io, which is in the backend, and therefore, you need to fix it there.

[aprilmintacpineda]

@giantss if you followed my advice above, you should have a code like this on the backend.

// .. other codes

server.listen(9000, () => {
  console.log('Dev server is running on http(s)://localhost:9000.');
  console.log('http(s)://10.0.22:9000 for android');
});

/**
 * socket.io
 */
import socketIO from 'socket.io';

const io = socketIO(server, {
  pingTimeout: 30000,
  pingInterval: 30000
});

// .. other codes

io.on('connection', socket => {
  // events
});

[giantss]

@aprilmintacpineda I use the server.js in this demo，I tried to modify the fifth line of the demo server.js file to the following,

 io = require('socket.io')(server, {pingTimeout: 30000,pingInterval: 30000}),

then restart the server, the problem still exists.

[aprilmintacpineda]

have you done npm update?

[giantss]

The version used in the demo is "socket.io": "^2.0.1"，Do you think there is a relationship with the version?

[rafser01]

Thanks @aprilmintacpineda
It works for me by adding

var io = require("socket.io")(server, {
  pingTimeout: 30000,
  pingInterval: 30000
});

in server side.

[ikhsanalatsary]

@giantss use latest version

[juergengunz]

all solutions mentioned here, do not solve this issue for me.... except, hiding the warning...

[kyriakos]

Unfortunately I have no control over the server side so I can't change the timeout. Why is this a server side issue to start with though?
Is this warning safe to ignore?

[pentarex]

for whoever doesn't work, restart you server.... tried like 20 times... stupid me :D

[sunday58]

@codejamninja thanks..it fixed it for Android... Plz I want to know all the warnings this api can fix..thanks

[darrachequesne]

For future readers: the default pingTimeout value was changed from 60000 to 5000 by this commit, included in [email protected] & [email protected].

So the complete delay (pingTimeout + pingInterval) is now 30s, which is below the RN threshold of 60s.

Note: this value may be a bit too small, as it may cause ping timeouts when uploading big files. Please increase it if needed.

Documentation here.