Muhammad Samir Khan created YARN-9671:
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Summary: Improve Locality Scheduling when cluster is busy
Key: YARN-9671
URL: https://issues.apache.org/jira/browse/YARN-9671
Project: Hadoop YARN
Issue Type: Improvement
Reporter: Muhammad Samir Khan
Assignee: Muhammad Samir Khan
When a cluster is very busy, scheduling opportunities are few and far between.
Scheduling opportunities are how an application knows when to give up looking
for decent locality.
It doesn't make sense to work hard waiting for locality when the odds of it
coming are very small and it may actually take a very long time to actually
give up.
This causes the priority of queues to be violated which is the last thing we
want to do when the cluster is full.
* Add metrics for queue priority inversions.
* Add mode to disable skipping locality when cluster is busy.
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