Ming Ma created HDFS-8670:
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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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