[jira] [Created] (YARN-12015) Add a Capacity Scheduler queue configuration resolver with explicit inheritance and value sources

["Benjamin Teke (Jira)" <ji...@apache.org>]

Benjamin Teke created YARN-12015:
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             Summary: Add a Capacity Scheduler queue configuration resolver with explicit inheritance and value sources
                 Key: YARN-12015
                 URL: https://issues.apache.org/jira/browse/YARN-12015
             Project: Hadoop YARN
          Issue Type: Sub-task
          Components: capacity scheduler
            Reporter: Benjamin Teke
            Assignee: Benjamin Teke


Defaults and inheritance rules for queue properties are spread across CapacitySchedulerConfiguration getters, settings classes and queue setup code.

Declare each per-queue property once (key, parser, applicable queue kinds, resolution chain: queue key, template, parent, global key, default; plus derivations such as absolute capacity and maximum applications) and add QueueConfigResolver, which produces an immutable ResolvedQueueConfig per queue in which every value records its source.

CapacitySchedulerConfiguration getters keep their signatures and delegate to the same descriptors, so each default and inheritance rule is defined once. Leaf queues, plan queues and the resolver share the maximum applications arithmetic (QueueApplicationLimits). Dynamic queue template values are read like trunk reads them after writing them into the configuration, including variables that reference other template entries. No behavior change should be implemented.



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