[LIVY-501] Support Spark 2.3 SparkR backend

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 0.5.0, 0.5.1
• Component/s: Interpreter
• Assignee: Unassigned
• Reporter: shanyu zhao
• Created: 27/Aug/18 23:45
• Updated: 28/Aug/18 03:54
• Resolved: 28/Aug/18 01:28

Description

Spark 2.3 modified RBackend:init() method to return Tuple2[Int, RAuthHelper] instead of just an Int.

https://github.com/apache/spark/commit/628c7b517969c4a7ccb26ea67ab3dd61266073ca

Livy does not work with this version of RBackend because it still expecting a single Int in the return value from init().