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https://issues.apache.org/jira/browse/HDFS-10313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15250582#comment-15250582
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Jing Zhao commented on HDFS-10313:
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bq. the old behavior is that we fallback to regular distcp if sync failed, my
suggested change would change the old behavior so no fallback would happen, I
believe it's safer, do you agree?
Yes, agree. Let's return some error msg here.
> Distcp does not check the order of snapshot names passed to -diff
> -----------------------------------------------------------------
>
> Key: HDFS-10313
> URL: https://issues.apache.org/jira/browse/HDFS-10313
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: distcp
> Reporter: Yongjun Zhang
> Assignee: Lin Yiqun
> Attachments: HDFS-10313.001.patch
>
>
> This jira is to propose adding a check to distcp, when {{-diff s1 s2}} is
> passed, we need to ensure that s2 is newer than s1, otherwise, abort with a
> informative error message.
> This is the result of my offline discussion with [~jingzhao] on HDFS-9820.
> Thanks Jing.
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