This is most probably caused by T147240: LoadBalancer fatals on Beta cluster rendering pages inaccessible.

-Sam

On Tue, Oct 4, 2016 at 1:22 PM, jenkins-bot <jenkins-bot@wikimedia.org> wrote:
FAILURE: selenium-GettingStarted Build #166 (Tue, 04 Oct 2016 12:22:00 +0000)