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https://issues.apache.org/jira/browse/MAPREDUCE-2846?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13085837#comment-13085837
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Eli Collins commented on MAPREDUCE-2846:
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MR-2413 (disk failure handling) and MR-2415 (distribute userlogs onto multiple
disks) were only implemented for LinuxTaskController but change some of the
relevant code, might be worth looking into.
> approx 10% of all tasks fail with DefaultTaskController
> -------------------------------------------------------
>
> Key: MAPREDUCE-2846
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2846
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: task, task-controller, tasktracker
> Affects Versions: 0.20.204.0
> Reporter: Allen Wittenauer
> Priority: Blocker
>
> After upgrading our test 0.20.203 grid to 0.20.204-rc2, we ran terasort to
> verify operation. While the job completed successfully, approx 10% of the
> tasks failed with task runner execution errors and the inability to create
> symlinks for attempt logs.
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