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https://issues.apache.org/jira/browse/SPARK-16302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Josh Rosen updated SPARK-16302:
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Assignee: Lianhui Wang
> Set the right number of partitions for reading data from a local collection.
> ----------------------------------------------------------------------------
>
> Key: SPARK-16302
> URL: https://issues.apache.org/jira/browse/SPARK-16302
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Lianhui Wang
> Assignee: Lianhui Wang
> Priority: Minor
> Fix For: 2.1.0
>
>
> query: val df = Seq[(Int, Int)]().toDF("key", "value").count it always use
> defaultParallelism tasks. So i cause run empty or small tasks.
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