Hadoop Secondary NameNode JVM metrics (HADOOP_SECONDARYNAMENODE_JVMMETRICS)

The HADOOP_SECONDARYNAMENODE_JVMMETRICS application class contains all the basic statistics received from the Java Virtual Machine metrics for the Secondary NameNode group. These attributes are related to the memory usage, thread counts, garbage collection and error logs of the JVM. The Hadoop KM gathers these attributes by executing the following query: 

<SecondaryNameNode jmx url>?qry=Hadoop:service=SecondaryNameNode,name=JvmMetrics

where,

<SecondaryNameNode jmx url> is the Java Management Extensions url, http://<<SecondaryNameNode host name>>:<<SecondaryNameNode 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

Item	Description
Active	Yes
Created by	Discovery
Parent class	HADOOP_SECONDARY_NAME_NODE
Child class	None

Attributes (parameters)