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https://issues.apache.org/jira/browse/SPARK-25376?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiangrui Meng updated SPARK-25376:
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Summary: Scenarios we should handle but missed in 2.4 for barrier execution
mode (was: Scenarios we should handle but missed for barrier execution mode)
> Scenarios we should handle but missed in 2.4 for barrier execution mode
> -----------------------------------------------------------------------
>
> Key: SPARK-25376
> URL: https://issues.apache.org/jira/browse/SPARK-25376
> Project: Spark
> Issue Type: Story
> Components: Spark Core
> Affects Versions: 2.4.0
> Reporter: Xiangrui Meng
> Priority: Major
>
> [~irashid] You mentioned that there are couple scenarios we should handle in
> barrier execution mode but we didn't in 2.4. Could you elaborate here?
> One scenario we are aware of is that speculation is not supported by barrier
> mode. Hence a barrier mode might hang in case of hardware issues on one node.
> I don't have a good proposal here except letting users set a timeout for the
> barrier stage. Would like to hear your thoughts.
> You also mentioned multi-tenancy issues. Could you say more?
> cc: [~jiangxb1987]
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