[KAFKA-7524] Recommend Scala 2.12 and use it for development

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.2.0
• Assignee: Ismael Juma
• Reporter: Ismael Juma
• Created: 21/Oct/18 02:30
• Updated: 28/Oct/18 18:45
• Resolved: 28/Oct/18 18:45

Description

Scala 2.12 has better support for newer Java versions and includes additional compiler warnings that are helpful during development. In addition, Scala 2.11 hasn't been supported by the Scala community for a long time, the soon to be released Spark 2.4.0 will finally support Scala 2.12 (this was the main reason preventing many from upgrading to Scala 2.12) and Scala 2.13 is at the RC stage. It's time to start recommending the Scala 2.12 build as we prepare support for Scala 2.13 and start thinking about removing support for Scala 2.11.

In the meantime, Jenkins will continue to build all supported Scala versions (including Scala 2.11) so the PR and trunk jobs will fail if people accidentally use methods introduced in Scala 2.12.

Issue Links

• links to: GitHub Pull Request #5530