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https://issues.apache.org/jira/browse/HBASE-19969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16395363#comment-16395363
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Ted Yu commented on HBASE-19969:
--------------------------------

Josh:
See HBASE-20123.
Looks like we would need hadoop 3.1.0+ to make backup tests fully working.

> Improve fault tolerance in backup merge operation
> -------------------------------------------------
>
>                 Key: HBASE-19969
>                 URL: https://issues.apache.org/jira/browse/HBASE-19969
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Vladimir Rodionov
>            Assignee: Vladimir Rodionov
>            Priority: Major
>             Fix For: 3.0.0
>
>         Attachments: 19969-v4.patch, HBASE-19969-v1.patch, 
> HBASE-19969-v2.patch, HBASE-19969-v3.patch
>
>
> Some file system operations are not fault tolerant during merge. We delete 
> backup data in a backup file system, then copy new data over to backup 
> destination. Deletes can be partial, copy can fail as well



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