Due to a persistent problem we have not yet been able to trace down, we have instituted a regular (weekly) system maintenance window, for every Friday evening at 17:00 Pacific time. During this time, you should assume that Tigris will be briefly unavailable (system restart).
I know this will be an inconvenience for some, particularly those who have to reschedule automated builds and similar processes. The problem, however, has been causing unscheduled restarts about every week and a half, so at least scheduling it in this way does allow you to accommodate, whereas the unscheduled outages do not.
We’re very sorry for the inconvenience. Rest assured, we continue to pursue the underlying problem, and sincerely hope to resolve it soon.