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https://issues.apache.org/jira/browse/HADOOP-5958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12768848#action_12768848
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Doug Cutting commented on HADOOP-5958:
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> Remove the inheritance from Shell? (incompatible change)
I'd be surprised if this broke any applications. It would indeed be safer to
add the dummy methods, deprecated, and file an issue to remove them attached to
the next release, but that feels like overkill here. Does any code in Hadoop
depend on it extending Shell?
Does java.io.File let you find the mount point? I thought we used that in
places, but perhaps not. I guess if it's used then we might still need to use
the 'df' command to support that, although perhaps we could avoid it for the
other methods.
> Use JDK 1.6 File APIs in DF.java wherever possible
> --------------------------------------------------
>
> Key: HADOOP-5958
> URL: https://issues.apache.org/jira/browse/HADOOP-5958
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Reporter: Devaraj Das
> Fix For: 0.21.0
>
>
> JDK 1.6 has File APIs like File.getFreeSpace() which should be used instead
> of spawning a command process for getting the various disk/partition related
> attributes. This would avoid spikes in memory consumption by tasks when
> things like LocalDirAllocator is used for creating paths on the filesystem.
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