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Posted to hdfs-issues@hadoop.apache.org by "Biju Nair (JIRA)" <ji...@apache.org> on 2014/07/15 21:23:04 UTC

[jira] [Created] (HDFS-6688) Hadoop JMX stats are not refreshed

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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