Polling not working in background in React Native

Intended outcome: Execute the query every 30 seconds even if the device is locked or if the app is in the background

Actual outcome: I want to execute a query every 30 seconds so I’m using pollInterval. Everything works fine, except when the application goes to the background because it stops from executing the query.

This is my query:

	const {
		loading,
		error,
		refetch,
		data
	} = useQuery(UNDELIVERED_ORDERS, {
		variables: {
			courier: userId
		},
		pollInterval: 30000,
		fetchPolicy: "network-only"
	})

How to reproduce the issue: Just use poll interval in React Native and press home or block the device

Versions

System: OS: Linux 5.0 Ubuntu 18.04.3 LTS (Bionic Beaver) Binaries: Node: 12.4.0 - ~/.nvm/versions/node/v12.4.0/bin/node Yarn: 1.19.2 - /usr/bin/yarn npm: 6.11.3 - ~/.nvm/versions/node/v12.4.0/bin/npm Browsers: Chrome: 78.0.3904.108 Firefox: 70.0.1 npmPackages: @apollo/react-hooks: ^3.0.1 => 3.0.1 apollo-boost: ^0.4.4 => 0.4.4 apollo-link-context: ^1.0.18 => 1.0.18 npmGlobalPackages: apollo: 2.18.3

[HugoLiconV]

So does a useQuery with a pollInterval set run in the background if the user were to navigate to the home screen of the device? Or would it only run if the app is opened?

For me, it’s only running when I have the app opened

[TheEhsanSarshar]

it’s not because of apollo-client. it’s because your app is in background and not just apollo-client but all of codes stop running. you should find a way to run background task