Update: data should now be recovered and everything back on track. Latest
data might take a bit of time to catch up since we have just restarted the
replication script on the analytics-slave.

All the details about the outage in https://phabricator.



2018-03-06 13:55 GMT+01:00 Luca Toscano <ltosc...@wikimedia.org>:

> Hi everybody,
> today, while performing maintenance to the Eventlogging Master database,
> we ended up in https://phabricator.wikimedia.org/T188991 (TL;DR: two
> hours of data inserted to the slave database and not the master one). We
> are working to find a feasible solution to avoid loosing data and getting
> out this inconsistent state, so as precautionary measure the Eventlogging
> mysql consumers have been stopped.
> A couple of notes:
> - The Eventlogging machinery is working as expected, except mysql
> insertion of course.
> - The HDFS data has not been affected by this issue.
> Please check the task for more updates, or follow up with the Analytics
> team on IRC (#wikimedia-analytics on freenode).
> Thanks and sorry for the trouble!
> Luca (on behalf of the Analytics team)
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