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https://issues.apache.org/jira/browse/HDFS-4114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14315345#comment-14315345
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Konstantin Shvachko commented on HDFS-4114:
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[Just in case you missed
it|https://issues.apache.org/jira/browse/HDFS-4114?focusedCommentId=13967774&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13967774].
I really prefer to first introduce interfaces to replace BackupNode, then
remove it. Isn't that what you said?
It is not just about the method signatures.
> Remove the BackupNode and CheckpointNode from trunk
> ---------------------------------------------------
>
> Key: HDFS-4114
> URL: https://issues.apache.org/jira/browse/HDFS-4114
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Eli Collins
> Assignee: Tsz Wo Nicholas Sze
> Attachments: HDFS-4114.000.patch, HDFS-4114.001.patch,
> HDFS-4114.patch, h4114_20150210.patch
>
>
> Per the thread on hdfs-dev@ (http://s.apache.org/tMT) let's remove the
> BackupNode and CheckpointNode.
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