Yufei Gu created YARN-7967:
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             Summary: Better doc and Java doc for Fair Scheduler Queue ACL
                 Key: YARN-7967
                 URL: https://issues.apache.org/jira/browse/YARN-7967
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: fairscheduler
    Affects Versions: 3.1.0
            Reporter: Yufei Gu


Wilfred mentioned that:
{quote}
Queue ACLs work bottom up. The first check is made at the leaf queue (in the 
example above q2). If the ACL at that level does not allow access we go up one 
level (here q1) and check that level. That process is repeated until we hit the 
top in the form of the root queue. If at any level we are allowed to submit or 
administer then the action is allowed and we stop reversing up the tree.
{quote}

Bottom up is a surprise behavior. Most queue related checking works top down. 
We should add this into Fair Scheduler Doc. In addition, maybe link the doc to 
Java Doc of AllocationFileLoaderService#getDefaultPermissions so that it won't 
be too confusing. 



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