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https://issues.apache.org/jira/browse/HDFS-13916?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17743079#comment-17743079
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ASF GitHub Bot commented on HDFS-13916:
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sadanand48 opened a new pull request, #5839:
URL: https://github.com/apache/hadoop/pull/5839
### Description of PR
Backport of change HDFS-13916 into branch-3.3
### How was this patch tested?
Unit tests.
> 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
> Fix For: 3.4.0
>
> 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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