Lost connection to background transfer service on large file

[joshweir]

RNFB: master (as at 16-Nov-2018)
RN: 0.57.2

I setup background upload following the readme, on small files this works but on large files the upload fails with:

[RNFetchBlobRequest] session didCompleteWithError Error Domain=NSURLErrorDomain Code=-997 "Lost connection to background transfer service" UserInfo={NSErrorFailingURLStringKey=https://hiddenurl.s3.amazonaws.com/, NSLocalizedDescription=Lost connection to background transfer service, NSErrorFailingURLKey=https://hiddenurl.s3.amazonaws.com/}
[info][tid:NSOperationQueue 0x1c0624fc0 (QOS: UTILITY)][RNFetchBlobRequest.m:362] [RNFetchBlobRequest] session didBecomeInvalidWithError (null)

I note that handleEventsForBackgroundURLSession in AppDelegate.m is not being triggered, however the uploadTaskWithRequest is being called (in sendRequest of RNFetchBlobRequest.m) and subsequent lines of sendRequest are being called, the task has a taskId.

Not sure where to go from here? Do you need any additional info?

[ghost]

I resolved it by adding capability of background tasks in the xCode; https://koenig-media.raywenderlich.com/uploads/2016/09/BM-EnableBackgroundFetch.png. However downloads stops when app in the background, but when you will return to the app, it continues.

[santi8194]

@NeliHarbuzava Did you ever find a solution? I'm having the same problem.