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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