Hello,
Pretty much everyone who's dealt with creating views for new wikis on the
labs hosts have experienced issues with "Access denied" sometimes.
This was usually due to the MariaDB grant role being missed. We tried to
workaround this by including the grant addition on the maintain-views
script.
Unfortunately, we ran into very weird problems when doing so and this is an
example:
https://phabricator.wikimedia.org/T193187#4273281
After lots of back and forth we decided to create a bug to MariaDB (
https://jira.mariadb.org/browse/MDEV-16466) which was confirmed by MariaDB
yesterday and pointed to a similar issue (
https://jira.mariadb.org/browse/MDEV-14732).
The expected fix will come in 10.4 (we are in 10.1), so quite long ahead of
us.
So, for now, the workaround before adding new views is to manually add the
GRANT on the DB and then run the script:
GRANT SELECT, SHOW VIEW ON `newiki\_p`.* to labsdbuser';
Hopefully with this email everyone is on the same page now.
Thanks everyone (specially Brooke for helping me out with the
troubleshooting!)
Manuel.