I don't think it includes entirely inactive nodes. Use the CLI or use
the RM REST API directly:
https://hadoop.apache.org/docs/current/hadoop-yarn/hadoop-yarn-site/ResourceManagerRest.html#Cluster_Nodes_API
On Mon, Oct 15, 2018 at 12:20 PM Huang Meilong wrote:
>
> Thank you Harsh,
>
>
> What are the possible values for the state in LiveNodeManagers bean? Will
> LOST, ACTIV, REBOOTED and DECOMMISSIONED show up in the state filed?
>
>
> 发件人: Harsh J
> 发送时间: 2018年10月15日 12:46:49
> 收件人: ims...@outlook.com
> 抄送:
> 主题: Re: How can I find out which nodemanagers are unhealthy and which
> nodemangers are lost?
>
> The JMX servlet query for 'RMNMInfo' done via
> /jmx?qry=Hadoop:service=ResourceManager,name=RMNMInfo returns a
> LiveNodeManagers bean whose value is a JSON-parseable string of all
> currently-tracked NodeManagers and their actual states (UNHEALTHY,
> RUNNING, etc.).
>
> You can also use the 'yarn node -list' command to retrieve similar
> information from a CLI.
> On Mon, Oct 15, 2018 at 8:48 AM Huang Meilong wrote:
> >
> > Hi,
> >
> >
> > I'm building a system to monitor my hadoop cluster, I can get metrics about
> > the cluster via hadoop
> > metrics(https://hadoop.apache.org/docs/r2.7.2/hadoop-project-dist/hadoop-common/Metrics.html?spm=5176.2020520111.111.1.278ad103oLtdlm#NodeManagerMetrics):
> >
> >
> > ClusterMetrics
> >
> > ClusterMetrics shows the metrics of the YARN cluster from the
> > ResourceManager’s perspective. Each metrics record contains Hostname tag as
> > additional information along with metrics.
> >
> > Name Description
> > 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
> >
> >
> > How can I find out which nodemangers are unhealthy and which are lost?
> > Better if it could be achieved by calling jmx rest api or hadoop command.
> >
> >
> > Any suggestions are appreciated, thank you.
> >
> >
> >
> > HUANG
> >
> >
> >
> >
>
>
> --
> Harsh J
--
Harsh J
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