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Posted to yarn-issues@hadoop.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2017/12/08 14:24:08 UTC
[jira] [Commented] (YARN-7625) Expose NM node/containers resource
utilization in JVM metrics
[ https://issues.apache.org/jira/browse/YARN-7625?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16283556#comment-16283556 ]
Jason Lowe commented on YARN-7625:
----------------------------------
Thanks for the patch!
Get methods that have side effects are a bit less than ideal. Would it make more sense to update the metrics when the values are calculated rather than when they are retrieved? Due to out-of-band heartbeats, it's not unusual for the nodemanager to generate a node status more often than the ContainersMonitorImpl and NodeResourceMonitorImpl will calculate new values. Similarly if the admin has configured a large node heartbeat interval then the metric is only updated when the node heartbeats rather than when new values have been calculated by the monitoring code.
> Expose NM node/containers resource utilization in JVM metrics
> -------------------------------------------------------------
>
> Key: YARN-7625
> URL: https://issues.apache.org/jira/browse/YARN-7625
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: nodemanager
> Reporter: Weiwei Yang
> Assignee: Weiwei Yang
> Attachments: YARN-7625.001.patch
>
>
> YARN-4055 adds node resource utilization to NM, we should expose these info in NM metrics, it helps in following cases:
> # Users want to check NM load in NM web UI or via rest API
> # Provide the API to further integrated to the new yarn UI, to display NM load status
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