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https://issues.apache.org/jira/browse/HADOOP-7551?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13126383#comment-13126383
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Ravi Gummadi commented on HADOOP-7551:
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I mean the concern seems to be not valid.
> LocalDirAllocator should incorporate LocalStorage
> -------------------------------------------------
>
> Key: HADOOP-7551
> URL: https://issues.apache.org/jira/browse/HADOOP-7551
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Affects Versions: 0.20.204.0
> Reporter: Eli Collins
>
> The o.a.h.fs.LocalDirAllocator is not aware of o.a.h.m.t.LocalStorage
> (introduced in MAPREDUCE-2413) - it always considers the configured local
> dirs, not just the ones that happen to be good. Therefore if there's a disk
> failure then *every* call to get a local path will result in
> LocalDirAllocator#confChanged doing a disk check of *all* the configured
> local dirs. It seems like LocalStorage should be a private class to
> LocalAllocator so that all users of LocalDirAllocator benefit from the disk
> failure handling and all the various users of LocalDirAllocator don't have to
> be modified to handle disk failures. Note that LocalDirAllocator already
> handles faulty directories.
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