+1 For a clear explanation and the links to the code. The code also expects realm=" to be the first parameter after the scheme.
+1 for Excellent response. Problem on my side was the server return of realm=... instead of realm="..." . Fixed that and app started working on both ICS and JB
As one can see in 4.1 JB the method getAuthorizationCredentials() throws the IOException. It parses the challenge headers it finds in the response using HeaderParser.parseChallenges(..), if the response code is 401 or 407. If the returned List is empty the Exception is thrown.
By now we have been able to verify that the usage of realm= without quotation marks was indeed the reason which caused this error for us. We were able to change this on our backend side and now everything is working as expected.
I am currently facing the same problem. On 4.1 Jelly Bean I receive an IOException "No authentication challenges found" when calling getResponseCode() on the HttpURLConnection.
I made my app work under android 4.x finally by just removing mHttpConnection.setDoOutput(true);But I still had not knewn clearly about the root cause.
We are currently investigating what exactly causes that List to be empty, but have the suspicion that our server might use realm=... instead of realm="..." in the challenge header. Missing quotation marks might be the cause for this problem. We have to investigate further if that is indeed the case and if we can make it work.
did you find a workaround for this? It works on kitkat, but not on JB