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