Bibin A Chundatt created YARN-3733:
--------------------------------------

             Summary:  On RM restart AM getting more than maximum possible 
memory when many  tasks in queue
                 Key: YARN-3733
                 URL: https://issues.apache.org/jira/browse/YARN-3733
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
         Environment: Suse 11 Sp3 , 2 NM , 2 RM
one NM - 3 GB 6 v core

            Reporter: Bibin A Chundatt
            Priority: Critical


Steps to reproduce
=================
1. Install HA with 2 RM 2 NM (3072 MB * 2 total cluster)
2. Configure map and reduce size to 512 MB  after changing scheduler minimum 
size to 512 MB
3. Configure capacity scheduler and AM limit to .5 (DominantResourceCalculator 
is configured)
4. Submit 30 concurrent task 
5. Switch RM

Actual
=====
For 12 Jobs AM gets allocated and all 12 starts running
No other Yarn child is initiated , *all 12 Jobs in Running state for ever*

Expected
=======
Only 6 should be running at a time since max AM allocated is .5 (3072 MB)






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