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https://issues.apache.org/jira/browse/HDFS-9685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15113543#comment-15113543
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Lin Yiqun commented on HDFS-9685:
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The failed tests seem not related.
> StopDecommission for datanode should remove the underReplicatedBlocks
> ---------------------------------------------------------------------
>
> Key: HDFS-9685
> URL: https://issues.apache.org/jira/browse/HDFS-9685
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.7.1
> Reporter: Lin Yiqun
> Assignee: Lin Yiqun
> Attachments: HDFS-9685.001.patch
>
>
> When one node removed from exclude file, and its state from
> decommission-in-progress to in service. But the underReplicatedBlocksNum of
> cluster has not been decreased. Most of these underReplicatedBlocks are not
> needed and it will costs namenode much time to deal with. And frequently
> namenode will find there are enough replications. So in
> {{stopDecommissioned}} operation, we should remove neededReplicatedBlocks of
> decomNodes.
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