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https://issues.apache.org/jira/browse/SPARK-22870?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-22870.
-------------------------------
Resolution: Fixed
Fix Version/s: 2.3.0
Issue resolved by pull request 20080
[https://github.com/apache/spark/pull/20080]
> Dynamic allocation should allow 0 idle time
> -------------------------------------------
>
> Key: SPARK-22870
> URL: https://issues.apache.org/jira/browse/SPARK-22870
> Project: Spark
> Issue Type: Improvement
> Components: Scheduler
> Affects Versions: 1.6.0
> Reporter: Xuefu Zhang
> Priority: Minor
> Fix For: 2.3.0
>
>
> As discussed in SPARK-22765, with SPARK-21656, an executor will not idle out
> when there are pending tasks to run. When there is no task to run, an
> executor will die out after {{spark.dynamicAllocation.executorIdleTimeout}},
> which is currently required to be greater than zero. However, for efficiency,
> a user should be able to specify that an executor can die out immediately w/o
> being required to be idle for at least 1s.
> This is to make {{0}} a valid value for
> {{spark.dynamicAllocation.executorIdleTimeout}}, and special handling such a
> case might be needed.
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