Description of problem:
While trying to Sign-in via GitHub on review.gluster.org(using Mozilla Firefox) I was presented with "Server Error" which resulted in a login failure.
Steps to Reproduce:
1. Log in to GitHub separately
2. Click on "Sign-in with GitHub" on https://review.gluster.org
Successful authentication via GitHub.
It works now. I could log in now via GitHub. How did that work all of a sudden?
This needed a Gerrit restart because of a Java security update.