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https://issues.apache.org/jira/browse/HDFS-13916?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16621727#comment-16621727
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Wei-Chiu Chuang commented on HDFS-13916:
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Stepping back a little, I realized HADOOP-15691 is targeting 3.3.0 release and
it's not even clear if it'll ever happen. What about we make two jiras, one
that is based on the current patch (and we work on it first) and another that
is based on HADOOP-15691?
I am proposing this, because (1) we shouldn't depend on HADOOP-15691 to
implement this one. (2) Moving SnapshotDiffReport from hadoop-hdfs-client to
hadoop-common is a big change that should only be included in a minor release.
> Distcp SnapshotDiff not completely implemented for supporting WebHdfs
> ---------------------------------------------------------------------
>
> Key: HDFS-13916
> URL: https://issues.apache.org/jira/browse/HDFS-13916
> Project: Hadoop HDFS
> Issue Type: Improvement
> 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.patch
>
>
> [~ljain] has worked on the JIRA:
> https://issues.apache.org/jira/browse/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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