Upload tasks get randomly restarted on a slow Android device about background_downloader

[781flyingdutchman]

Since you mentioned a slow Android 12 device I think it's likely that the OS cancels the task because it is trying to manage performance. If you Google around you'll see lots of examples of that, and there is nothing you can do except indeed chunking the upload.

[781flyingdutchman]

Two possible reasons:

1. Upload is canceled by server (because it takes too long or is too slow)
2. Upload is canceled by Android OS (especially on less-performant devices the Android OEM often implements aggressive background task management to improve perceived performance, and this includes unceremoniously canceling background tasks)

The second is most likely given how you describe the problem, and unfortunately there is nothing you can do about that. There is nothing in the logs that stands out.

[Ansis100]

1. Upload is canceled by server (because it takes too long or is too slow)

Don't think so. The DAV logs show errors mentioning incomplete downloads (i.e. expected x bytes, received y bytes), which probably means the client is terminating the connection too soon.

Does this mean that big file on slow devices are generally impossible to upload? Could this be solved by switching to the MemoryQueue?

If nothing can be done about this then we might need to think about chunking these kinds of slow uploads.

[Ansis100]

Alright, I'll look into that. Thanks for the info!