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https://issues.apache.org/jira/browse/YARN-6193?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Karthik Kambatla updated YARN-6193:
-----------------------------------
Description:
{{FSAppAttempt#canContainerBePreempted}} verifies preempting a container
doesn't lead to new starvation ({{Resources.fitsIn}}). When using DRF, this
leads to verifying both resources instead of just the dominant resource.
Ideally, the check should be based on policy.
Note that current implementation of
{{DominantResourceFairnessPolicy#checkIfUsageOverFairShare}} is broken.
was:{{DominantResourceFairnessPolicy#checkIfUsageOverFairShare}} considers
all resources instead of just dominant resource. Ideally, it should use the
DominantResourceCalculator.
> FairScheduler might not trigger preemption when using DRF
> ---------------------------------------------------------
>
> Key: YARN-6193
> URL: https://issues.apache.org/jira/browse/YARN-6193
> Project: Hadoop YARN
> Issue Type: Bug
> Components: fairscheduler
> Affects Versions: 2.8.0
> Reporter: Karthik Kambatla
> Assignee: Karthik Kambatla
>
> {{FSAppAttempt#canContainerBePreempted}} verifies preempting a container
> doesn't lead to new starvation ({{Resources.fitsIn}}). When using DRF, this
> leads to verifying both resources instead of just the dominant resource.
> Ideally, the check should be based on policy.
> Note that current implementation of
> {{DominantResourceFairnessPolicy#checkIfUsageOverFairShare}} is broken.
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