[jira] [Created] (MESOS-9688) Quota is not enforced properly when subroles makes reservation.

["Meng Zhu (JIRA)" <ji...@apache.org>]

Meng Zhu created MESOS-9688:
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             Summary: Quota is not enforced properly when subroles makes reservation.
                 Key: MESOS-9688
                 URL: https://issues.apache.org/jira/browse/MESOS-9688
             Project: Mesos
          Issue Type: Bug
          Components: allocation
            Reporter: Meng Zhu


Note: the discussion here concerns quota enforcement for top-level role, setting quota on sublevel role is not supported.

If a subrole directly makes a reservation (note: *NOT* reservation refinement where the reservation is first made to the top role then refined to a subrole), the accounting of `roleConsumedQuota` will be off:

https://github.com/apache/mesos/blob/master/src/master/allocator/mesos/hierarchical.cpp#L1703-L1705

Specifically, in this formula:
`Consumed Quota = reservations + allocation - allocated reservations`

The `reservation` part does not take account of subrule's reservation (again, reservations made first to the top role "a" and then refined to "a/b" are fine).

The "allocation" and "allocated reservations" are both tracked in the sorter where the hierarchical relationship is considered -- allocations are added hierarchically.



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