[YARN-4308] ContainersAggregated CPU resource utilization reports negative usage in first few heartbeats

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7.1
• Fix Version/s: 2.9.0, 3.0.0-alpha1
• Component/s: nodemanager
• Target Version/s: 2.9.0
• Hadoop Flags: Reviewed
• Assignee: Sunil G
• Reporter: Sunil G
• Created: 28/Oct/15 16:17
• Updated: 25/Oct/19 20:26
• Resolved: 09/Jun/16 00:24

Description

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.

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

Its better we send 0 as CPU usage rather than sending a negative values in heartbeats eventhough its happening in only first few heartbeats.

Issue Links

• is duplicated by: YARN-4885 Aggregate container utilization can be negative