yanbing zhang created YARN-9490:
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             Summary: applicationresourceusagereport return wrong number of 
reserved containers
                 Key: YARN-9490
                 URL: https://issues.apache.org/jira/browse/YARN-9490
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
    Affects Versions: 3.3.0
            Reporter: yanbing zhang
             Fix For: 3.3.0


when getting an ApplicationResourceUsageReport instance from the class of 
SchedulerApplicationAttempt, I found the input constructor 
parameter(reservedContainers.size()) is wrong.  because the type of this 
variable is Map<SchedulerRequestKey, Map<NodeId, RMContainer>>, so 
"reservedContainer.size()" is not the number of containers, but the number of 
SchedulerRequestKey.



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