Lin Yiqun created YARN-4396:
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             Summary: Log the trance information on FSAppAttempt#assignContainer
                 Key: YARN-4396
                 URL: https://issues.apache.org/jira/browse/YARN-4396
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: applications, scheduler
    Affects Versions: 2.7.1
            Reporter: Lin Yiqun
            Assignee: Lin Yiqun


When I configure the yarn.scheduler.fair.locality.threshold.node and 
yarn.scheduler.fair.locality.threshold.rack to open this function, I have no 
detail info of assigning container's locality. And it's important because it 
will lead some delay scheduling and will have an influence on my cluster. If I 
know these info, I can adjust param in cluster.



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