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From "Zhijie Shen (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-407) The requested AM memory is not checked against the maximum resource capacity in ResourceMgrDelegate and MRAppMaster
Date Fri, 15 Feb 2013 22:37:13 GMT
Zhijie Shen created YARN-407:
--------------------------------

             Summary: The requested AM memory is not checked against the maximum resource
capacity in ResourceMgrDelegate and MRAppMaster
                 Key: YARN-407
                 URL: https://issues.apache.org/jira/browse/YARN-407
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Zhijie Shen
            Assignee: Zhijie Shen


For the MR jobs, the requested AM memory is at the risk of being larger than the maximum resource
capacity. It is because the logic to check the requested AM memory against the maximum resource
capacity is missing in ResourceMgrDelegate and MRAppMaster. In contrast, this logic exists
in Client and ApplicationMaster of the distributed shell.

Another potential risk is that the requested AM memory is likely to be rounded up when being
normalized, therefore the after-normalization AM memory can be larger than the maximum resource
capacity as well.

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