[SPARK-12604] Java count(AprroxDistinct)ByKey methods return Scala Long not Java

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.6.0
• Fix Version/s: 2.0.0
• Component/s: Java API, Spark Core
• Labels: releasenotes
• Target Version/s: 2.0.0
• Assignee: Sean R. Owen
• Reporter: Sean R. Owen
• Created: 02/Jan/16 11:50
• Updated: 23/Apr/16 09:24
• Resolved: 07/Jan/16 01:17

Description

Another minor API problem I noticed while digging around. The following Java API methods return a Long as part of their signature, but it's a scala.Long, not a java.lang.Long:

• countByKey
• countApproxDistinctByKey

Other similar methods correctly return a Java Long, like countByValue, and the whole Java streaming API.

Of course, changing this is probably the right thing to do, but also is an API change. I think it's worth fixing up

Issue Links

• is duplicated by: SPARK-14873 Java sampleByKey methods take ju.Map but with Scala Double values; results in type Object
• links to: [Github] Pull Request #10554 (srowen)
• links to: [Github] Pull Request #10641 (srowen)