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From "Sunil G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4308) ContainersAggregated CPU resource utilization reports negative usage in first few heartbeats
Date Wed, 25 May 2016 13:59:14 GMT

    [ https://issues.apache.org/jira/browse/YARN-4308?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15300082#comment-15300082
] 

Sunil G commented on YARN-4308:
-------------------------------

Hi [~templedf]

[~Naganarasimha Garla] also had a same concern. And earlier i tried to explain with this [comment.|https://issues.apache.org/jira/browse/YARN-4308?focusedCommentId=15258302&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15258302].
With {{MockResourceCalculatorProcessTree#getCpuUsagePercent}}, I am overriding the default
CPU usage from -1 to 0. If I am not overloading, then this will always be skipped in {{ContainreMonitor}}.
Actual;y existing tests were covering this scenario already. Do you see whether we need one
more test for same?. Pls help to share your thoughts.

> 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, 0003-YARN-4308.patch,
0004-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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