https://github.com/apache/druid/releases/tag/druid-0.17.0
Druid is currently at version 0.17, and our version 0.12.3 is starting to lag too much from upstream. This means more painful upgrades and more things to check/consider as new releases comes out. Two major motivations to upgrade:
* Having the last security auth/encryption features (useful to integrate Kerberos for example)
* Hopefully solving problems like T226035
Things to do/keep-in-mind:
* Druid is now a top level project, it went out from the incubator so some APIs etc.. might have changed.
* Check the prometheus exporter before calling it done since it will surely require adjustments.
* Check the full list of changes in the changelog to figure out if any change will affect our current settings in a negative way.