[jira] [Created] (YARN-4712) CPU Usage Metric is not captured properly in YARN-2928

[Naganarasimha G R (JIRA)]

Naganarasimha G R created YARN-4712:
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             Summary: CPU Usage Metric is not captured properly in YARN-2928
                 Key: YARN-4712
                 URL: https://issues.apache.org/jira/browse/YARN-4712
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Naganarasimha G R
            Assignee: Naganarasimha G R


There are 2 issues with CPU usage collection 
* I was able to observe that that many times CPU usage got from 
{{pTree.getCpuUsagePercent()}} is 
ResourceCalculatorProcessTree.UNAVAILABLE(i.e. -1) but ContainersMonitor do the 
calculation  i.e. {{cpuUsageTotalCoresPercentage = cpuUsagePercentPerCore 
/resourceCalculatorPlugin.getNumProcessors()}} because of which UNAVAILABLE 
check in {{NMTimelinePublisher.reportContainerResourceUsage}} is not 
encountered. so proper checks needs to be handled
* {{EntityColumnPrefix.METRIC}} uses always LongConverter but ContainerMonitor 
is publishing decimal values for the CPU usage.



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