Hong Zhiguo created YARN-4104:

             Summary: dryrun of schedule for diagnostic and tenant's complain
                 Key: YARN-4104
                 URL: https://issues.apache.org/jira/browse/YARN-4104
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: scheduler
            Reporter: Hong Zhiguo
            Assignee: Hong Zhiguo
            Priority: Minor

We have more than 1 thousand queues and several handreds of tenants in a busy 
cluster. We get a lot of complains/questions from owner/operator of queues 
about "Why my queue/app can't get resource for a long while? "

It's realy hard to answer such questions.

So we added an diagnostic REST endpoint 
"/ws/v1/cluster/schedule/dryrun/{parentQueueName}" which returns the sorted 
list of it's children according to it's SchedulingPolicy.getComparator().  All 
scheduling parameters of the chidren are also displayed, such as minShare, 
usage, demand, weight, priority etc.
Usually we just call "/ws/v1/cluster/schedule/root", and the result 
self-explains to the questions.
I feel it's really usefull for multi-tenant clusters, and hope it could be 
merged into the mainline.

This message was sent by Atlassian JIRA

Reply via email to