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From "Aaron T. Myers (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-2997) Expose status of DNs from the NN programmatically
Date Thu, 23 Feb 2012 16:10:49 GMT
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
    Affects Versions: 0.23.1
            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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