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https://issues.apache.org/jira/browse/SPARK-3655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14711435#comment-14711435
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Nick Xie commented on SPARK-3655:
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It is in your api/java/GroupSorted.scala
line 8: import com.google.common.collect.{ Ordering => GuavaOrdering }
.....
line 29: private implicit def ordering[K]: Ordering[K] =
comparatorToOrdering(GuavaOrdering.natural.asInstanceOf[Comparator[K]])
> Support sorting of values in addition to keys (i.e. secondary sort)
> -------------------------------------------------------------------
>
> Key: SPARK-3655
> URL: https://issues.apache.org/jira/browse/SPARK-3655
> Project: Spark
> Issue Type: New Feature
> Components: Spark Core
> Affects Versions: 1.1.0, 1.2.0
> Reporter: koert kuipers
> Assignee: Koert Kuipers
>
> Now that spark has a sort based shuffle, can we expect a secondary sort soon?
> There are some use cases where getting a sorted iterator of values per key is
> helpful.
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