[SPARK-14347] Require Java 8 for Spark 2.x

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Later
• Affects Version/s: 2.0.0
• Component/s: DStreams, MLlib, Spark Core, SQL
• Target Version/s: 2.0.0
• Assignee: Unassigned
• Reporter: Sean R. Owen
• Created: 02/Apr/16 20:17
• Updated: 22/Apr/16 20:40
• Resolved: 22/Apr/16 20:40

Description

Putting this down as a JIRA to advance the discussion – I think this is far enough along to consensus for that.

The change here is to require Java 8. This means:

• Require Java 8 in the build
• Only build and test with Java 8, removing other older Jenkins configs
• Remove MaxPermSize
• Remove reflection to use Java 8-only methods
• Move external/java8-tests to core/streaming and remove profile

And optionally:

• Update all Java 8 code to take advantage of 8+ features, like lambdas, for simplification

Issue Links

• links to: [Github] Pull Request #12165 (srowen)