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https://issues.apache.org/jira/browse/SPARK-16984?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Herman van Hovell resolved SPARK-16984.
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Resolution: Fixed
Assignee: Robert Kruszewski
Fix Version/s: 2.1.0
> executeTake tries all partitions if first parition is empty
> -----------------------------------------------------------
>
> Key: SPARK-16984
> URL: https://issues.apache.org/jira/browse/SPARK-16984
> Project: Spark
> Issue Type: Bug
> Affects Versions: 2.0.0
> Reporter: Robert Kruszewski
> Assignee: Robert Kruszewski
> Fix For: 2.1.0
>
>
> in executeTake if the number of rows returned by first partition is 0 we try
> all partitions next time. This can lead to pathological cases where your
> first partition is empty and rest have data. This unfortunately can happen
> with skewed data. Empirically observed it's better to make few roundtrips
> instead of potentially killing driver with big collect
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