Discovery features

Introduce data exploration feature (beta)
- You can search and find the data you want to use.
Add additional options when creating data sources.
- Schema modifications have been improved in the ingestion stage.
- The re-ingestion feature has been added.
Improved metadata management
- You can do metadata management on all db connections supported by metatron.
- You can see sample data in metadata details view.
Improved notebook functionality
- Change Notebook connection information from existing hostname and port to url
- Added the function to release notebook server in workspace
Improved the item view in the workspace.
- Along with some design changes, let you know the (un)publishing status of the resources associated with the item.
Compatible with the latest Java version(12)
Support spark as data trasformation engine in data-preparation

Druid features

You need to upgrade your Druid according to the Discovery version.
Use druid-metatron-3.3.0.tar.gz from the assets of this release page.