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https://issues.apache.org/jira/browse/SPARK-29976?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Graves resolved SPARK-29976.
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Fix Version/s: 3.0.0
Assignee: Yuchen Huo
Resolution: Fixed
> Allow speculation even if there is only one task
> ------------------------------------------------
>
> Key: SPARK-29976
> URL: https://issues.apache.org/jira/browse/SPARK-29976
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 3.0.0
> Reporter: Yuchen Huo
> Assignee: Yuchen Huo
> Priority: Major
> Fix For: 3.0.0
>
>
> In the current speculative execution implementation if there is only one task
> in the stage then no speculative run would be conducted. However, there might
> be cases where an executor have some problem in writing to its disk and just
> hang forever. In this case, if the single task stage get assigned to the
> problematic executor then the whole job would hang forever. It would be
> better if we could run the task on another executor if this happens.
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