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From "Ming Ma (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-8670) Better to exclude decommissioned nodes for namenode NodeUsage JMX
Date Thu, 25 Jun 2015 22:32:06 GMT
Ming Ma created HDFS-8670:
-----------------------------

             Summary: Better to exclude decommissioned nodes for namenode NodeUsage JMX
                 Key: HDFS-8670
                 URL: https://issues.apache.org/jira/browse/HDFS-8670
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Ming Ma


The namenode NodeUsage JMX has Max, Median, Min and Standard Deviation of DataNodes usage,
it currently includes decommissioned nodes for the calculation. However, given balancer doesn't
work on decommissioned nodes and sometimes we could have nodes stay in decommissioned states
for a long time; it might be better to exclude decommissioned nodes for the metrics calculation.



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