NameNode Component Health

Ambari.SCOM.Rollup.NameNodeComponentToHdfsServiceAvailability (DependencyMonitor)

Rolls up NameNode Component availability monitors to the Hadoop HDFS Service.

Knowledge Base article:

Summary

This monitor is the rollup of availability monitoring for NameNode Host Component. If the state is unknown - monitoring has not been initialized yet.

Causes

An unhealthy state for this monitor indicates some problem with availability of NameNode Host Component. View all current alerts for HDFS Cluster Service using this link:

View Alerts

Resolutions

Use the health explorer to drill down and find the cause of the unhealthy state. Use the knowledge on the specific monitor causing the issue to troubleshoot and fix the problem.

Element properties:

Target	Ambari.SCOM.ClusterService.Hdfs
Parent Monitor	System.Health.AvailabilityState
Algorithm	WorstOf
Source Monitor	System.Health.AvailabilityState
Relationship	Ambari.SCOM.HdfsServiceContainsNameNodeComponent
Category	AvailabilityHealth
Enabled	True
Alert Generate	False
Alert Auto Resolve	False
Remotable	True
Accessibility	Public

Source Code:

<DependencyMonitor ID="Ambari.SCOM.Rollup.NameNodeComponentToHdfsServiceAvailability" Target="Ambari.SCOM.ClusterService.Hdfs" ParentMonitorID="Health!System.Health.AvailabilityState" RelationshipType="Ambari.SCOM.HdfsServiceContainsNameNodeComponent" MemberMonitor="Health!System.Health.AvailabilityState" Accessibility="Public" Enabled="true" Remotable="true" Priority="Normal">

  <Category>AvailabilityHealth</Category>

  <Algorithm>WorstOf</Algorithm>

</DependencyMonitor>