Hi all,
A bug in the code that imports EventLogging data into Hive caused top 3
level EventCapsule <https://meta.wikimedia.org/wiki/Schema:EventCapsule>
fields to be set to NULL in all Hive EventLogging tables
since 2018-11-29T17:00:00. The affected fields were recvFrom, seqId, and
(more importantly) userAgent.
We've fixed the bug, and are backfilling the data now.
https://phabricator.wikimedia.org/T211833 has more info.
Sorry for the inconvenience! Follow the phabricator ticket to get updates
on when backfilling has completed.
-Andrew Otto
Systems Engineer, WMF