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From "Daniel Templeton (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4308) ContainersAggregated CPU resource utilization reports negative usage in first few heartbeats
Date Mon, 16 May 2016 13:49:13 GMT

    [ https://issues.apache.org/jira/browse/YARN-4308?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15284502#comment-15284502
] 

Daniel Templeton commented on YARN-4308:
----------------------------------------

Interesting idea.  When you say, "enable debug log," do you mean the admin can do that or
that you'd do it automatically in the code?

> ContainersAggregated CPU resource utilization reports negative usage in first few heartbeats
> --------------------------------------------------------------------------------------------
>
>                 Key: YARN-4308
>                 URL: https://issues.apache.org/jira/browse/YARN-4308
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.7.1
>            Reporter: Sunil G
>            Assignee: Sunil G
>         Attachments: 0001-YARN-4308.patch, 0002-YARN-4308.patch
>
>
> NodeManager reports ContainerAggregated CPU resource utilization as -ve value in first
few heartbeats cycles. I added a new debug print and received below values from heartbeats.
> {noformat}
> INFO org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainersMonitorImpl:
ContainersResource Utilization : CpuTrackerUsagePercent : -1.0 
> INFO org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainersMonitorImpl:ContainersResource
Utilization :  CpuTrackerUsagePercent : 198.94598
> {noformat}
> Its better we send 0 as CPU usage rather than sending a negative values in heartbeats
eventhough its happening in only first few heartbeats.



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