Hello!

I just finished writing a short incident report on the maps issue of last Friday [1].

Basically, I was stupid and reinitialized Cassandra on the wrong node.

This should have had almost no effect, except that the system_auth keyspace of Cassandra is configured with a replication factor of 1. Loosing that node means that we also lost authentication.

Thanks a lot to Brandon for the help in mitigating this!

[1] https://wikitech.wikimedia.org/wiki/Incident_documentation/20161021-Maps