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https://issues.apache.org/jira/browse/YARN-2155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14029792#comment-14029792
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Karthik Kambatla commented on YARN-2155:
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Good catch [~octo47]. Thanks for fixing it, Wei.
The fix looks good to me. +1.
> FairScheduler: Incorrect check when trigger a preemption
> --------------------------------------------------------
>
> Key: YARN-2155
> URL: https://issues.apache.org/jira/browse/YARN-2155
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Wei Yan
> Assignee: Wei Yan
> Attachments: YARN-2155.patch
>
>
> {code}
> private boolean shouldAttemptPreemption() {
> if (preemptionEnabled) {
> return (preemptionUtilizationThreshold < Math.max(
> (float) rootMetrics.getAvailableMB() / clusterResource.getMemory(),
> (float) rootMetrics.getAvailableVirtualCores() /
> clusterResource.getVirtualCores()));
> }
> return false;
> }
> {code}
> preemptionUtilizationThreshould should be compared with allocatedResource
> instead of availableResource.
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