Problem unregistering background fetch task

Expo SDK
1

Hi all,

I’m using SDK 34 and when I try to unregister the background fetch task in either Android or iOS I get an error -

await BackgroundFetch.unregisterTaskAsync(BACKGROUND_FETCH_TASK);

Invalid task consumer. Cannot unregister task with name 'background-fetch' because it is associated with different consumer class.

Has anyone see this before? It basically means that the background fetch tasks aren’t getting unregistered.

thanks
Nick

2

Anyone?

3

Observing the exact same behaviour

Invalid task consumer. Cannot unregister task with name 'location-updates' because it is associated with different consumer class.

My code looks like this

let isRegistered = await TaskManager.isTaskRegisteredAsync(LOCATION_UPDATES_TASK);
if (isRegistered) {
      await BackgroundFetch.unregisterTaskAsync(LOCATION_UPDATES_TASK);
}

Which to me looks fine. However the error is unexpected.

SDK = 34.0.3

4

Hi @bosuntechnology and @eddyoc

Someone (not sure if this is you, @bosuntechnology) posted a comment on an issue on GitHub with the same error:

NickR49 commented 6 days ago •

Hi all,

What I’m finding is that I must have the await Location.startLocationUpdatesAsync(BACKGROUND_FETCH_TASK); code to make background fetch work for iOS. However when I use that then unregistering the task fails with Invalid task consumer. Cannot unregister task with name 'background-fetch' because it is associated with different consumer class. . I’m guessing this is because the task started as a backgroundFetch task type and got changed to a location task type.

Any idea why calling Location.startLocationUpdatesAsync(taskName) is necessary to get background fetch working for iOS @tsapeta ?

cheers
Nick

Can one of you create a snack that demonstrates the problem and then create an issue here explaining the problem with a link to the snack?

Then post the link to the issue in this thread.

5

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