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From "Karam Singh (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-4606) Sometimes Fairness inconjuncttions with UserLimitPercent and UserLimitFactor in queue leads to situation where it appears that applications in queue are getting starved or stuck
Date Tue, 19 Jan 2016 09:43:39 GMT
Karam Singh created YARN-4606:
---------------------------------

             Summary: Sometimes Fairness inconjuncttions with UserLimitPercent and UserLimitFactor
in queue leads to situation where it appears that applications in queue are getting starved
or stuck
                 Key: YARN-4606
                 URL: https://issues.apache.org/jira/browse/YARN-4606
             Project: Hadoop YARN
          Issue Type: Bug
          Components: capacity scheduler, capacityscheduler
    Affects Versions: 2.7.1, 2.8.0
            Reporter: Karam Singh


Encountered while studying behaviour fairness with UserLimitPercent and UserLimitFactor during
following test:
Ran GridMix with Queue settings: Capacity=10, MaxCap=80, UserLimit=25 UserLimitFactor=32,
FairOrderingPolicy only. Encountered a application starving situation where 33 application
(190 apps completed out of 761 apps, queue can 345 containers) are running with total of 45
containers running, and that 12 extra only one app(the app was having around 18000 tasks)
, all other apps were having AM running only no other containers were given any apps. After
that app finished, there were 32 AMs that kept running without any containers for task being
launched
GridMix was run with following settings:
gridmix.client.pending.queue.depth=10, gridmix.job-submission.policy=REPLAY, gridmix.client.submit.threads=5,
gridmix.submit.multiplier=0.0001, gridmix.job.type=SLEEPJOB, mapreduce.framework.name=yarn,
mapreduce.job.queuename=hive1, mapred.job.queue.name=hive1, gridmix.sleep.max-map-time=5000,
gridmix.sleep.max-reduce-time=5000, gridmix.user.resolve.class=org.apache.hadoop.mapred.gridmix.RoundRobinUserResolver
With Users file containing 4 users for RoundRobinUserResolver



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