Clustermetrics - aajisaka/hadoop-metrics GitHub Wiki

• NumActiveNMs
  • Current number of active NodeManagers
• NumDecommissionedNMs
  • Current number of decommissioned NodeManagers
• NumLostNMs
  • Current number of lost NodeManagers for not sending heartbeats
• NumUnhealthyNMs
  • Current number of unhealthy NodeManagers
• NumRebootedNMs
  • Current number of rebooted NodeManagers

For more details, see org.apache.hadoop.yarn.server.resourcemanager.ClusterMetrics.java