Since about 1 week ago I'm getting consistently 500. That’s an error from accounts.google.com side when trying to authenticate with Google.
The first request to
https://accounts.google.com/o/oauth2/auth?scope=openid%20email%20https://adwords.google.com/api/adwords/%20https://www.googleapis.com/auth/drive%20https://spreadsheets.google.com/feeds%20https://docs.google.com/feeds&response_type=token&redirect_uri=https://<XXXXXX>/&state=<XXXX>2&client_id=<MY_CLIENT_NUMBER>.apps.googleusercontent.com&hd=
returns 200, but then the second request to
https://accounts.google.com/signin/oauth?hd&client_id=<app_id>.apps.googleusercontent.com&as=-XXXXXX&nosignup=1&destination=https://<my_app_uri>&approval_state=<somewhatrandomstate>&xsrfsig=<signature>
almost always fails with 500.
I'm using Java Google API client version 1.22.0 and my application is deployed on AWS (region eu-central-1). I'm currently signed in to multiple google accounts, so Account Chooser is triggered.
Any ideas what could be the problem? This auth flow worked fine for long time before then.
The problem was a very slight change of behavior on Google side. Mainly handling hd parameter. Before this change hd parameter was accepted even empty, but now when it's empty it usually ends up with status code 500.