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https://issues.apache.org/jira/browse/YARN-9490?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16819703#comment-16819703
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Tao Yang commented on YARN-9490:
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Thanks [~zyb] for raising this issue.
The patch makes sense to me, just a small suggestion: we can iterate values if
no need to access the keys, and a simpler way is to use stream like this:
this.reservedContainers.values().stream().mapToInt(Map::size).sum();
> 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
> Priority: Minor
> Fix For: 3.3.0
>
> Attachments: YARN-9490.patch
>
>
> 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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