Open Radar

 
Summary:
I've created an App Group in my provisioning profile for my app. I've also added Suite usage for my NSUserDefaults. I know the app group is working because the extension I'm testing can access the NSUserDefaults fine. However when I create a NSURLSessionConfiguration with a sharedContainerIdentifier I'm getting back a invalidated NSURLSession immediately which according to the documentation is what happens when the App Group is not valid or you don't set the  sharedContainerIdentifier properly.

Steps to Reproduce:
let sessionConfig = NSURLSessionConfiguration.backgroundSessionConfigurationWithIdentifier("io.avocado.AvocadoShare.UploadSession")

sessionConfig.sharedContainerIdentifier = "group.avocado.io"

sessionConfig.allowsCellularAccess = true
sessionConfig.sessionSendsLaunchEvents = true
sessionConfig.discretionary = true
sessionConfig.HTTPShouldSetCookies = true

let session = NSURLSession(configuration: sessionConfig)

// This task is immediately invalidated
let task = session.uploadTaskWithRequest(aRequest, fromFile: fileUrl)

Expected Results:
A valid working session. This was working in Xcode6-B5 I believe, but it is no longer working. My code hasn't changed

Actual Results:
This task is immediately invalidated. See above sample code

Version:
8.0 (12A4345d)

Notes:
Occurs in Xcode6-B6, but same code was working in Xcode6-B5
https://devforums.apple.com/message/1030869#1030869