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From: "Dmytro Sen (JIRA)" <jira@apache.org>
To: dev@ambari.apache.org
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Subject: [jira] [Assigned] (AMBARI-5607) Yarn Nodemanager Metrics only
 update every few minutes
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     [ https://issues.apache.org/jira/browse/AMBARI-5607?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dmytro Sen reassigned AMBARI-5607:
----------------------------------

    Assignee: Dmytro Sen

> Yarn Nodemanager Metrics only update every few minutes
> ------------------------------------------------------
>
>                 Key: AMBARI-5607
>                 URL: https://issues.apache.org/jira/browse/AMBARI-5607
>             Project: Ambari
>          Issue Type: Bug
>    Affects Versions: 1.5.1
>         Environment: sles11sp1
>            Reporter: Michael Harp
>            Assignee: Dmytro Sen
>
> Yarn Nodemanager Metrics take far too long between updates.
> To demonstrate:
> Run Terasort or anything that runs mapreduce:
> {code}
> hdfs dfs -mkdir -p benchmarks/terasort
> hadoop jar /usr/lib/hadoop-mapreduce/hadoop-mapreduce-examples.jar teragen -Dmapred.map.tasks=72 -Dmapred.reduce.tasks=36  1000000 benchmarks/terasort/input
> hadoop jar /usr/lib/hadoop-mapreduce/hadoop-mapreduce-examples.jar terasort -Dmapred.map.tasks=72 -Dmapred.reduce.tasks=36 benchmarks/terasort/input benchmarks/terasort/output
> hdfs dfs -rm -R -skipTrash benchmarks/terasort
> {code}
> Then repeatedly probe the API at:
> {noformat}https://<server>:8081/api/v1/clusters/c1/services/YARN/components/NODEMANAGER?fields=host_components/metrics/yarn{noformat}
> It usually takes 2-3 minutes to see the metrics update, very repeatable.



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