Hi Mark,

you were right: it was a 401 causing this. The odd thing being, I got
this exception *before* I was actually able to check for a 401 (it was
thrown in getResponseCode()). But now knowing this error represents a
401, I was able to fix it in my code (I was not sending the OAuth
verifier code which was required at this point).

Thanks!

On Aug 31, 3:33 pm, "Mark Murphy" <mmur...@commonsware.com> wrote:
> > I am using HttpURLConnection to send a GET request to a server. Upon
> > reading the response code, the Android implementation of
> > HttpURLConnection.doRequestInternal() throws an exception:
>
> > "java.io.IOException: Received authentication challenge is null"
>
> > I don't even get what the error is trying to tell me.
>
> Off the cuff, it would seem as though you're getting a 401 Unauthorized
> error, due to a malformed Authorization header.
>
> > This works fine with Sun's Java implementation, so I guess it's a
> > problem with Apache Harmony?
>
> That's a distinct possibility.
>
> --
> Mark Murphy (a Commons Guy)http://commonsware.com
> Android App Developer Books:http://commonsware.com/books.html
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