[ https://issues.apache.org/jira/browse/YARN-6538?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wangda Tan updated YARN-6538: ----------------------------- Issue Type: Sub-task (was: Bug) Parent: YARN-8159 > Inter Queue preemption is not happening when DRF is configured > -------------------------------------------------------------- > > Key: YARN-6538 > URL: https://issues.apache.org/jira/browse/YARN-6538 > Project: Hadoop YARN > Issue Type: Sub-task > Components: capacity scheduler, scheduler preemption > Affects Versions: 2.8.0 > Reporter: Sunil G > Assignee: Sunil G > Priority: Major > > Cluster capacity of <memory:3TB, vCores:168>. Here memory is more and vcores > are less. If applications have more demand, vcores might be exhausted. > Inter queue preemption ideally has to be kicked in once vcores is over > utilized. However preemption is not happening. > Analysis: > In {{AbstractPreemptableResourceCalculator.computeFixpointAllocation}}, > {code} > // assign all cluster resources until no more demand, or no resources are > // left > while (!orderedByNeed.isEmpty() && Resources.greaterThan(rc, totGuarant, > unassigned, Resources.none())) { > {code} > will loop even when vcores are 0 (because memory is still +ve). Hence we are > having more vcores in idealAssigned which cause no-preemption cases. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org