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The above API call retrieves two metrics values which represent the point in time metric value for the requested metrics obtained for the Metrics Service backend. (non JMX)

For a call to get JMX metrics directly from a Hadoop daemon, use the metrics name that corresponds to the JMX MBean metric, example: metrics/dfs/FSNamesystem/CapacityUsedGB (Refer to Stack Defined Metrics for more info)

The request part of the above API call selects the service from the cluster while predicate part includes the metrics names.

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