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https://issues.apache.org/jira/browse/SPARK-9548?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14653173#comment-14653173
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Apache Spark commented on SPARK-9548:
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User 'viirya' has created a pull request for this issue:
https://github.com/apache/spark/pull/7924
> BytesToBytesMap could have a destructive iterator
> -------------------------------------------------
>
> Key: SPARK-9548
> URL: https://issues.apache.org/jira/browse/SPARK-9548
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Josh Rosen
>
> BytesToBytesMap.iterator() could be destructive, freeing each page as it
> moves onto the next one. There are some circumstances where we don't want a
> destructive iterator (such as when we're building a KV sorter from a map), so
> there should be a flag to control this.
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