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https://issues.apache.org/jira/browse/SPARK-8029?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Imran Rashid updated SPARK-8029:
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Attachment: AlternativesforMakingShuffleMapTasksRobusttoMultipleAttempts.pdf
[~joshrosen] and I discussed this a bit, I'm uploading a doc with a discussion
of some alternatives. I am working on exploring the options a little, but
would appreciate any feedback on the various options.
> ShuffleMapTasks must be robust to concurrent attempts on the same executor
> --------------------------------------------------------------------------
>
> Key: SPARK-8029
> URL: https://issues.apache.org/jira/browse/SPARK-8029
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.4.0
> Reporter: Imran Rashid
> Attachments:
> AlternativesforMakingShuffleMapTasksRobusttoMultipleAttempts.pdf
>
>
> When stages get retried, a task may have more than one attempt running at the
> same time, on the same executor. Currently this causes problems for
> ShuffleMapTasks, since all attempts try to write to the same output files.
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