Hadoop NameNode metrics system stats (HADOOP_NAMENODE_METRICSSYSTEM_STATS)

The HADOOP_NAMENODE_METRICSSYSTEM_STATS application class monitors the metrics snapshots and publish attributes of the NameNode. The Hadoop KM gathers these attributes by executing the following query:

<NameNode jmx url>?qry= Hadoop:service=NameNode,name=MetricsSystem,sub=Stats

where,

<NameNode jmx url>  Java Management Extensions url, http://<<NameNode name>>:<<NameNode port>>/jmx

qry is Hadoop by default

service contains the type of the group, for example, DataNode, ResourceManager, JobTracker, ResourceManager, TaskTracker and other available groups

name contains the type of metrics data you want to collect and display, for example, JVMmetrics, Queuemetrics, RPCactivity and other available metrics types

Application class attributes

Attributes (parameters)