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https://issues.apache.org/jira/browse/HADOOP-18117?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hui Fei resolved HADOOP-18117.
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Fix Version/s: 3.4.0
Resolution: Fixed
> Add an option to preserve root directory permissions
> ----------------------------------------------------
>
> Key: HADOOP-18117
> URL: https://issues.apache.org/jira/browse/HADOOP-18117
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Mohanad Elsafty
> Assignee: Mohanad Elsafty
> Priority: Minor
> Labels: pull-request-available
> Fix For: 3.4.0
>
> Time Spent: 2h 50m
> Remaining Estimate: 0h
>
> As mentioned in https://issues.apache.org/jira/browse/HADOOP-15211
>
> If *-update* or *-overwrite* is being passed when *distcp* used, the root
> directory will be skipped in two occasions (CopyListing#doBuildListing &
> CopyCommitter#preserveFileAttributesForDirectories), which will ignore root
> directory's attributes.
>
> We face the same issue when distcp huge data between clusters and it takes
> too much effort to update root directories attributes manually.
>
> From the earlier ticket it's obvious why this behaviour is there, but
> sometime we need to enforce root directory update hence I will add a new
> option for distcp to enable someone (who understands the need of this and
> know what they are doing) to enforce the update of root directory's
> attributes (permissions, ownership, ...)
>
> It should be simple one, something like this
> {code:java}
> $ hadoop distcp -p -update -updateRootDirectoryAttributes /a/b/c /a/b/d {code}
> This behaviour is optional and will be *false* by default. (it should not
> affect existing *distcp* users).
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