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https://issues.apache.org/jira/browse/SPARK-8029?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14965832#comment-14965832
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Reynold Xin commented on SPARK-8029:
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It'd be really good to fix this in 1.6, and maybe even backport it to older
branches.
[~irashid] Would you have time to give "Executors Commit ShuffleMapOutput:
First Attempt Wins" in your design proposal a try? It seems like a much smaller
fix needed, and the chance of that fix having problems is pretty low (despite
you think it is "optimistic").
> 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
> Assignee: Imran Rashid
> Priority: Critical
> 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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