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https://issues.apache.org/jira/browse/SPARK-6168?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14367787#comment-14367787
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Apache Spark commented on SPARK-6168:
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User 'mridulm' has created a pull request for this issue:
https://github.com/apache/spark/pull/5084
> Expose some of the collection classes as DeveloperApi
> -----------------------------------------------------
>
> Key: SPARK-6168
> URL: https://issues.apache.org/jira/browse/SPARK-6168
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 1.4.0
> Reporter: Mridul Muralidharan
> Priority: Minor
>
> It would be very useful to mark some of the collection and util classes we
> have as @DeveloperApi or even @Experimental.
> For example :
> - org.apache.spark.util.BoundedPriorityQueue
> - org.apache.spark.util.collection.Utils
> - org.apache.spark.util.collection.CompactBuffer
> Usecases for these are for example to do a treeAggregate and/or treeReduce
> impl for common api's within RDD which fail due to limitations of
> aggregate/reduce at scale (ref: SPARK-6165).
> Ofcourse, they are useful for other things too :-)
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