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https://issues.apache.org/jira/browse/HDFS-5051?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Colin Patrick McCabe resolved HDFS-5051.
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Resolution: Fixed
> Propagate cache status information from the DataNode to the NameNode
> --------------------------------------------------------------------
>
> Key: HDFS-5051
> URL: https://issues.apache.org/jira/browse/HDFS-5051
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, namenode
> Reporter: Colin Patrick McCabe
> Assignee: Andrew Wang
> Attachments: hdfs-5051-1.patch, hdfs-5051-2.patch
>
>
> The DataNode needs to inform the NameNode of its current cache state. Let's
> wire up the RPCs and stub out the relevant methods on the DN and NN side.
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