Xianyin Xin created YARN-3547:

             Summary: Apps that have no resource demand should not participate 
                 Key: YARN-3547
                 URL: https://issues.apache.org/jira/browse/YARN-3547
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: scheduler
            Reporter: Xianyin Xin

At present, all of the 'running' apps participate the scheduling process, 
however, most of them may have no resource demand on a production cluster, as 
the app's status is running other than waiting for resource at the most of the 
app's lifetime. It's not a wise way we sort all the 'running' apps and try to 
fulfill them, especially on a large-scale cluster which has heavy scheduling 

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