[SPARK-3994] countByKey / countByValue do not go through Aggregator

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.0
• Fix Version/s: 1.2.0
• Component/s: Spark Core
• Target Version/s: 1.2.0
• Assignee: Aaron Davidson
• Reporter: Aaron Davidson
• Created: 17/Oct/14 21:50
• Updated: 21/Oct/14 20:16
• Resolved: 21/Oct/14 20:16

Description

The implementations of these methods are historical remnants of Spark from a time when the shuffle may have been nonexistent. Now, they can be simplified by plugging into reduceByKey(), potentially seeing performance and stability improvements.

Issue Links

• links to: [Github] Pull Request #2839 (aarondav)