In our effort to bring you a more performant and stable helpdesk, we have been hard at work making some big changes behind the scenes. The cause for this downtime, which was limited to one cluster, is related to that work.
The length of the outage was because the problem that occurred was new to us and the large main database required some time to recover.
We are confident in what the root cause was so we do not expect this to happen again. We sincerely apologize for the inconvenience.