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Posted to mapreduce-issues@hadoop.apache.org by "Steve Loughran (Jira)" <ji...@apache.org> on 2020/07/29 13:35:00 UTC

[jira] [Updated] (MAPREDUCE-7287) Distcp will delete exists file , If we use "--delete and --update" options and distcp file.

     [ https://issues.apache.org/jira/browse/MAPREDUCE-7287?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Loughran updated MAPREDUCE-7287:
--------------------------------------
    Priority: Major  (was: Minor)

> Distcp will delete exists file ,  If we use "--delete and --update" options and distcp file.
> --------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-7287
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-7287
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: distcp
>    Affects Versions: 3.2.1
>            Reporter: zhengchenyu
>            Priority: Major
>             Fix For: 3.3.1
>
>
> hdfs://ns1/tmp/a is an existing file, hdfs://ns2/tmp/a is also an existing file.
> When I run this command, 
> {code}
> hadoop distcp -delete -update hdfs://ns1/tmp/a hdfs://ns2/tmp/a
> {code}
> I Found hdfs://ns2/tmp/a is deleted unpectectedly.
>  
> Then problem is DeletedDirTracker. Because here we only distcp a file (not a directory), the varialbe `directories` in DeletedDirTracker is not set.
> Maybe I think DeletedDirTracker only consider directory in design stage. But we distcp only a file, they are deleted unpectectedly.



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