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https://issues.apache.org/jira/browse/SPARK-21506?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-21506.
---------------------------------
Resolution: Fixed
Fix Version/s: 2.3.0
Issue resolved by pull request 18711
[https://github.com/apache/spark/pull/18711]
> The description of "spark.executor.cores" may be not correct
> -------------------------------------------------------------
>
> Key: SPARK-21506
> URL: https://issues.apache.org/jira/browse/SPARK-21506
> Project: Spark
> Issue Type: Improvement
> Components: Documentation
> Affects Versions: 2.2.0
> Reporter: liuxian
> Priority: Trivial
> Fix For: 2.3.0
>
>
> The description for "spark.executor.cores" :"The number of cores assigned to
> each executor is configurable. When this is not explicitly set, only one
> executor per application will run the same worker "
> I think it is not correct, because if one application is not assigned
> enough cores in the first `schedule()`, another executor may be launched on
> the same worker in the next time.
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