Biju Nair created HDFS-6688:
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Summary: Hadoop JMX stats are not refreshed
Key: HDFS-6688
URL: https://issues.apache.org/jira/browse/HDFS-6688
Project: Hadoop HDFS
Issue Type: Bug
Environment: Ubuntu
Reporter: Biju Nair
Even when the HDFS datanode process is stopped the JMX attribute
Hadoop.NameNode.FSNamesystemState.NumLiveDataNodes/NumDeadDataNodes attribute
values doesn't change. Also Hadoop.NameNode.NameNodeInfo.Attributes.LiveNodes
shows the stopped datanode details. If these attributes reflect the actual
changes in the datanode, they can be used to monitor the health of the HDFS
cluster which currently can't be used.
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