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https://issues.apache.org/jira/browse/SPARK-1707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13989498#comment-13989498
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Thomas Graves commented on SPARK-1707:
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See discussions on SPARK-1453.
> Remove 3 second sleep before starting app on YARN
> -------------------------------------------------
>
> Key: SPARK-1707
> URL: https://issues.apache.org/jira/browse/SPARK-1707
> Project: Spark
> Issue Type: Improvement
> Components: YARN
> Reporter: Sandy Ryza
> Assignee: Sandy Ryza
>
> After acquiring allocations from YARN and launching containers, Spark
> currently waits for 3 seconds for executors to connect to the driver. On
> Spark standalone, nothing like this happens.
> I'm wondering whether we can just remove this sleep entirely. Is there a
> reason I'm missing why YARN is different than standalone in this regard? At
> the least we could do something smarter like wait until all executors have
> registered.
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