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https://issues.apache.org/jira/browse/HIVE-12951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15120600#comment-15120600
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Rui Li commented on HIVE-12951:
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Hi [~xuefuz], Spark has configurations
{{spark.scheduler.minRegisteredResourcesRatio}} and
{{spark.scheduler.maxRegisteredResourcesWaitingTime}}, which I think serve the
purpose of pre-warm. I suppose we do this on hive side because we use the
number of executors to set the number of reducers?
> Reduce Spark executor prewarm timeout to 5s
> -------------------------------------------
>
> Key: HIVE-12951
> URL: https://issues.apache.org/jira/browse/HIVE-12951
> Project: Hive
> Issue Type: Bug
> Components: Spark
> Affects Versions: 1.2.0
> Reporter: Xuefu Zhang
> Assignee: Xuefu Zhang
> Attachments: HIVE-12951.patch
>
>
> Currently it's set to 30s, which tends to be longer than needed. Reduce it to
> 5s, only considering jvm startup time. (Eventually, we may want to make this
> configurable.)
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