[SPARK-17999] Add getPreferredLocations for KafkaSourceRDD

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.0.2, 2.1.0
• Component/s: Structured Streaming
• Assignee: Saisai Shao
• Reporter: Saisai Shao
• Created: 19/Oct/16 02:51
• Updated: 28/Dec/16 18:11
• Resolved: 20/Oct/16 17:51

Description

The newly implemented Structured Streaming KafkaSource did calculate the preferred locations for each topic partition, but didn't offer this information through RDD's getPreferredLocations method. So here propose to add this method in KafkaSourceRDD.

Issue Links

• links to: [Github] Pull Request #15545 (jerryshao)