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https://issues.apache.org/jira/browse/SPARK-4741?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Josh Rosen updated SPARK-4741:
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Component/s: Spark Core
Shuffle
> Do not destroy and re-create FileInputStream
> --------------------------------------------
>
> Key: SPARK-4741
> URL: https://issues.apache.org/jira/browse/SPARK-4741
> Project: Spark
> Issue Type: Improvement
> Components: Shuffle, Spark Core
> Reporter: Liang-Chi Hsieh
> Priority: Minor
>
> The FileInputStream in DiskMapIterator is destroyed and recreate after each
> batch reading. However, since we can change the reading position on that
> stream, it is no need and inefficient to destroy and recreate it every time.
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