Getting timeout errors a lot

[fabianhijlkema]

I'm making calls to Fauna from a Netlify function, and I seem to be getting a lot of timeout errors that I can't get rid of. They occur to ~10% or more of my calls, but without a particular pattern that I see.

{"message":"Request aborted due to timeout","isTimeoutError":true} Response with status 500 in 5006 ms.

const formattedResponse = require('./utils/formattedResponse')
const {encodeString} = require("./utils/encodeDecodeString")

const faunadb = require('faunadb')
const secret = process.env.DB_ADMIN_KEY
const faunaClient = new faunadb.Client({ secret, timeout: 5, queryTimeout: 5000, keepAlive: true })
const q = faunadb.query

const handler = async (event, context, callback) => {
	if(event.httpMethod !== 'POST') {
		return formattedResponse(405, { message: 'Method not supported. POST expected.' })
	}

	const { client, uid } = JSON.parse(event.body)
	if(!uid || !client) {
		return formattedResponse(500, { message: 'Insufficient data provided.' })
	}
	try {
		const PARAMETERS = await faunaClient.query( <FAUNA QUERY EXCLUDED> )
		
		return formattedResponse(200, {
			client: PARAMETERS.client,
			parameters: PARAMETERS.parameters,
			db: encodeString(PARAMETERS.db.id)
		})
	} catch (error) {
		console.log(JSON.stringify(error))
		if(error.requestResult) return formattedResponse(error.requestResult.statusCode, { message: error.message })
		return formattedResponse(500, { message: 'Something went wrong.' })
	}
}

module.exports = {
	handler
}

I've tried adding context.callbackWaitsForEmptyEventLoop = false and looked at https://docs.fauna.com/fauna/current/drivers/known_issues. I've tried changing the keepAlive setting to false to see if that changed anything, but I keep getting timeout errors.

I'm running the latest version "faunadb": "^4.1.1" and using the latest version of Netlify CLI.

Am I doing something wrong? Or is this to be expected and should I find a way to retry in case of a timeout?

[github-actions]

Internal ticket number is OSS-724

[fireridlle]

you pass queryTimeout to the Client constructor which is set to be 5 sec

[fabianhijlkema]

I know, if I set it 10 seconds it times out at 10. Which is the maximum amount of seconds a Netlify Function will run. But usually this call takes a fraction of a second.

But maybe the problem lies in the local dev server run by Netlify, because on a live Netlify function this seems to happen less or not. So I might need to raise this issue with Netlify rather than here.

[fireridlle]

Can you check the NodeJS runtime version? there is an issue with some 12.16.1 version (probably some other versions too)
Long story short, NodeJS v12.16.1 doesn’t trigger the end event for Http2Stream. you can read more here nodejs/node#31309.

Personally, I have got the same when using NodeJS v12.16.1 on and of.
With lts/erbium → v12.22.1 issue seems to be fixed