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https://issues.apache.org/jira/browse/YARN-4090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15700940#comment-15700940
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He Tianyi commented on YARN-4090:
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Hi, [~xinxianyin]. The patch didn't cause deadlock. There has been another
cause.
BTW, I've been running a build with the patch for nearly 3 month on a cluster
serving 50M container allocations each day, and everything works fine.
> Make Collections.sort() more efficient in FSParentQueue.java
> ------------------------------------------------------------
>
> Key: YARN-4090
> URL: https://issues.apache.org/jira/browse/YARN-4090
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: fairscheduler
> Reporter: Xianyin Xin
> Assignee: Xianyin Xin
> Attachments: YARN-4090-TestResult.pdf, YARN-4090-preview.patch,
> YARN-4090.001.patch, YARN-4090.002.patch, YARN-4090.003.patch, sampling1.jpg,
> sampling2.jpg
>
>
> Collections.sort() consumes too much time in a scheduling round.
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