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An elasticsearch upgrade is in progress, forced a little early due to an issue that downgraded an instance for 6 to 5 (which made the indices unopenable). It should be back up in a bit. On the production side we don't expect to have similar issues, and we have multiple clusters so we will be upgrading clusters while they are not serving user traffic.
Ah, cool, thanks. I should have looked at the logs which make it pretty clear this is transient. I just tend to assume that anything broken on beta has been broken for weeks with no one noticing...