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Unhealthy NodeManagers

Ambari.SCOM.UnitMonitor.YarnUnhealthyNodeManagers (UnitMonitor)

Gives warning/critical alert if percentage of YARN unhealthy NodeManagers is more than lower/upper threshold.

Knowledge Base article:

Summary

Gives warning/critical alert if percentage of YARN unhealthy NodeManagers is more than lower/upper threshold.

Causes

TBD

Resolutions

TBD

Element properties:

TargetAmbari.SCOM.ClusterService.Yarn
Parent MonitorSystem.Health.AvailabilityState
CategoryAvailabilityHealth
EnabledTrue
Alert GenerateTrue
Alert SeverityMatchMonitorHealth
Alert PriorityNormal
Alert Auto ResolveTrue
Monitor TypeAmbari.SCOM.UnitMonitorType.YarnServiceThreeStateThreshold
RemotableTrue
AccessibilityPublic
Alert Message
A significant number of NodeManagers are unhealthy in the cluster.
There are {1}\% unhealthy NodeManagers in cluster "{0}".
RunAsDefault

Source Code:

<UnitMonitor ID="Ambari.SCOM.UnitMonitor.YarnUnhealthyNodeManagers" TypeID="Ambari.SCOM.UnitMonitorType.YarnServiceThreeStateThreshold" Target="Ambari.SCOM.ClusterService.Yarn" ParentMonitorID="Health!System.Health.AvailabilityState" Remotable="true" Priority="Normal" Accessibility="Public" Enabled="true" ConfirmDelivery="true">

  <Category>AvailabilityHealth</Category>

  <AlertSettings AlertMessage="Ambari.SCOM.UnitMonitor.YarnUnhealthyNodeManagers.AlertMessage">

    <AlertOnState>Warning</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Normal</AlertPriority>

    <AlertSeverity>MatchMonitorHealth</AlertSeverity>

    <AlertParameters>

      <AlertParameter1>$Target/Host/Property[Type="Ambari.SCOM.ClusterService.Private"]/ClusterName$</AlertParameter1>

      <AlertParameter2>$Data/Context/Property[@Name='unhealthynodemanagers_percent']$</AlertParameter2>

    </AlertParameters>

  </AlertSettings>

  <OperationalStates>

    <OperationalState ID="Healthy" MonitorTypeStateID="Healthy" HealthState="Success"/>

    <OperationalState ID="Warning" MonitorTypeStateID="Warning" HealthState="Warning"/>

    <OperationalState ID="Critical" MonitorTypeStateID="Critical" HealthState="Error"/>

  </OperationalStates>

  <Configuration>

    <IntervalSeconds>900</IntervalSeconds>

    <TimeoutSeconds>300</TimeoutSeconds>

    <PropertyName>unhealthynodemanagers_percent</PropertyName>

    <TheGreaterTheBetter>false</TheGreaterTheBetter>

    <WarningThreshold>10</WarningThreshold>

    <CriticalThreshold>20</CriticalThreshold>

  </Configuration>

</UnitMonitor>