[SPARK-2278] groupBy & groupByKey should support custom comparator

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 1.0.0
• Component/s: Java API
• Assignee: Unassigned
• Reporter: Hans Uhlig
• Created: 25/Jun/14 16:19
• Updated: 23/Jan/15 14:06
• Resolved: 23/Jan/15 14:06

Description

To maintain parity with MapReduce you should be able to specify a custom key equality function in groupBy/groupByKey similar to sortByKey.