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https://issues.apache.org/jira/browse/HDFS-15479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17164004#comment-17164004
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Tsz-wo Sze commented on HDFS-15479:
-----------------------------------

[~ayushtkn],  I also notice the failure recently.  I am going to fix it in 
HDFS-15481 by moving the conf out from DFSConfigKeys.

> Ordered snapshot deletion: make it a configurable feature
> ---------------------------------------------------------
>
>                 Key: HDFS-15479
>                 URL: https://issues.apache.org/jira/browse/HDFS-15479
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: snapshots
>            Reporter: Tsz-wo Sze
>            Assignee: Tsz-wo Sze
>            Priority: Major
>             Fix For: 3.4.0
>
>         Attachments: h15479_20200719.patch
>
>
> Ordered snapshot deletion is a configurable feature.  In this JIRA, a conf is 
> added.
> When the feature is enabled, only the earliest snapshot can be deleted.  For 
> deleting the non-earliest snapshots, the behavior is temporarily changed to 
> throwing an exception in this JIRA.  In HDFS-15480, the behavior of deleting 
> the non-earliest snapshots will be changed to marking them as deleted.



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