Jason Lowe created YARN-3489:
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Summary: RMServerUtils.validateResourceRequests should only obtain
queue info once
Key: YARN-3489
URL: https://issues.apache.org/jira/browse/YARN-3489
Project: Hadoop YARN
Issue Type: Improvement
Components: resourcemanager
Affects Versions: 2.6.0
Reporter: Jason Lowe
Since the label support was added we now get the queue info for each request
being validated in SchedulerUtils.validateResourceRequest. If
validateResourceRequests needs to validate a lot of requests at a time (e.g.:
large cluster with lots of varied locality in the requests) then it will get
the queue info for each request. Since we build the queue info this generates
a lot of unnecessary garbage, as the queue isn't changing between requests. We
should grab the queue info once and pass it down rather than building it again
for each request.
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