At this time the cleanup has finished and we're processing builds as expected.
Posted Jan 12, 2016 - 20:29 UTC
Identified
We identified a repository that made multiple pushes that resulted in a 600 job build matrix and this was the source of the delays. We're running a cleanup process which is steadily marching along. We'll update once we've finished cleaning up.
Posted Jan 12, 2016 - 19:17 UTC
Investigating
We're currently investigating build delays in .org GCE `sudo:required` builds