[LIVY-201] Pick up R executable from configuration first

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.2
• Fix Version/s: 0.3
• Component/s: Interpreter
• Assignee: Jeff Zhang
• Reporter: Jeff Zhang
• Created: 10/Aug/16 06:43
• Updated: 15/Aug/16 17:21
• Resolved: 15/Aug/16 17:21

Description

For now, I can not run sparkr in cluster mode as livy pick up R executable from environment variable DRIVER_R, but spark didn't pass DRIVER_R to AM in yarn-cluster mode (This can be fixed in spark side). And since spark introduce spark.sparkr.r.command & spark.r.command for configuring R executable. Livy should also take this configuration over environment variable DRIVER_R.