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https://issues.apache.org/jira/browse/HDFS-13916?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17366562#comment-17366562
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Masatake Iwasaki commented on HDFS-13916:
-----------------------------------------

I rebased the patch on behalf of [~renxunsaky]. attached 007.

> Distcp SnapshotDiff to support WebHDFS
> --------------------------------------
>
>                 Key: HDFS-13916
>                 URL: https://issues.apache.org/jira/browse/HDFS-13916
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: distcp, webhdfs
>    Affects Versions: 3.0.1, 3.1.1
>            Reporter: Xun REN
>            Assignee: Xun REN
>            Priority: Major
>              Labels: easyfix, newbie, patch
>         Attachments: HDFS-13916.002.patch, HDFS-13916.003.patch, 
> HDFS-13916.004.patch, HDFS-13916.005.patch, HDFS-13916.006.patch, 
> HDFS-13916.007.patch, HDFS-13916.patch
>
>
> [~ljain] has worked on the JIRA: HDFS-13052 to provide the possibility to 
> make DistCP of SnapshotDiff with WebHDFSFileSystem. However, in the patch, 
> there is no modification for the real java class which is used by launching 
> the command "hadoop distcp ..."
>  
> You can check in the latest version here:
> [https://github.com/apache/hadoop/blob/branch-3.1.1/hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/DistCpSync.java#L96-L100]
> In the method "preSyncCheck" of the class "DistCpSync", we still check if the 
> file system is DFS. 
> So I propose to change the class DistCpSync in order to take into 
> consideration what was committed by Lokesh Jain.



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