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https://issues.apache.org/jira/browse/HDFS-11034?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16173117#comment-16173117
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Brahma Reddy Battula commented on HDFS-11034:
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can we add one argument to {{hdfs dfsadmin -refreshNodes}} itself instead of
new admin command..?
May be something like {{clearDeadNodes}}..?
> Provide a command line tool to clear decommissioned DataNode information from
> the NameNode without restarting.
> --------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-11034
> URL: https://issues.apache.org/jira/browse/HDFS-11034
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Reporter: Chris Nauroth
> Assignee: Gergely Novák
>
> Information about decommissioned DataNodes remains tracked in the NameNode
> for the entire NameNode process lifetime. Currently, the only way to clear
> this information is to restart the NameNode. This issue proposes to add a
> way to clear this information online, without requiring a process restart.
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