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https://issues.apache.org/jira/browse/HADOOP-12975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15348567#comment-15348567
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Colin Patrick McCabe commented on HADOOP-12975:
-----------------------------------------------
Thanks for the heads up, [~vinayrpet]. I fixed the accidental revert of
HADOOP-13072.
> Add jitter to CachingGetSpaceUsed's thread
> ------------------------------------------
>
> Key: HADOOP-12975
> URL: https://issues.apache.org/jira/browse/HADOOP-12975
> Project: Hadoop Common
> Issue Type: Sub-task
> Affects Versions: 2.8.0
> Reporter: Elliott Clark
> Assignee: Elliott Clark
> Fix For: 2.8.0
>
> Attachments: HADOOP-12975v0.patch, HADOOP-12975v1.patch,
> HADOOP-12975v2.patch, HADOOP-12975v3.patch, HADOOP-12975v4.patch,
> HADOOP-12975v5.patch, HADOOP-12975v6.patch
>
>
> Running DU across lots of disks is very expensive and running all of the
> processes at the same time creates a noticeable IO spike. We should add some
> jitter.
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