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From "Aaron T. Myers (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-2997) Expose status of DNs from the NN programmatically
Date Thu, 23 Feb 2012 17:54:48 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2997?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Aaron T. Myers resolved HDFS-2997.

          Resolution: Not A Problem
    Target Version/s:   (was: 0.23.2)

My mistake, Suresh. This info is indeed already present. Sorry for the noise.
> Expose status of DNs from the NN programmatically
> -------------------------------------------------
>                 Key: HDFS-2997
>                 URL: https://issues.apache.org/jira/browse/HDFS-2997
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: name-node
>            Reporter: Aaron T. Myers
> Users who would like monitor the NN's view of DN health currently have two options: either
parse the NN web UI, or call the (private API) DFSClient#datanodeReport. We should expose
this in a nicer way, e.g. through metrics.

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