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From "Naganarasimha G R (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-4712) CPU Usage Metric is not captured properly in YARN-2928
Date Sun, 21 Feb 2016 18:54:18 GMT
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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