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https://issues.apache.org/jira/browse/MAPREDUCE-3011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13132297#comment-13132297
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Ravi Gummadi commented on MAPREDUCE-3011:
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AFAIK TT is modifying the conf object(s) based on disks' health. If you see
some cases where we are missing updating conf, we can fix them too. Fine ?
> TT should remove bad local dirs from conf to prevent constant disk checking
> ---------------------------------------------------------------------------
>
> Key: MAPREDUCE-3011
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3011
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Components: tasktracker
> Affects Versions: 0.20.204.0
> Reporter: Eli Collins
>
> Per HADOOP-7551 the TT does not remove bad mapred.local.dirs from the conf so
> after a single disk failure *every* call to get a local path for reading or
> writing results in a disk check of *all* configured local dirs. After
> detecting that a local dir is bad we should remove it from the conf so that
> we don't repeatedly perform this expensive operation.
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