[jira] [Work logged] (HADOOP-18117) Add an option to preserve root directory permissions

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-18117?focusedWorklogId=723573&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-723573 ]

ASF GitHub Bot logged work on HADOOP-18117:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 09/Feb/22 10:52
            Start Date: 09/Feb/22 10:52
    Worklog Time Spent: 10m 
      Work Description: mohan3d opened a new pull request #3970:
URL: https://github.com/apache/hadoop/pull/3970


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   ### Description of PR
   Add an option to preserve root directory permissions when using **distcp**
   
   ### How was this patch tested?
   dev-support/bin/test-patch against trunk and unittest
   
   
   ### For code changes:
   
   - [x] Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
   - [ ] Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
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Issue Time Tracking
-------------------

            Worklog Id:     (was: 723573)
    Remaining Estimate: 0h
            Time Spent: 10m

> 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
>            Priority: Minor
>          Time Spent: 10m
>  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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