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https://issues.apache.org/jira/browse/YARN-6025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15796658#comment-15796658
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Naganarasimha G R commented on YARN-6025:
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Thanks for the review and commit [~leftnoteasy] and additional review from
[~sunilg]
> Fix synchronization issues of AbstractYarnScheduler#nodeUpdate and its
> implementations
> --------------------------------------------------------------------------------------
>
> Key: YARN-6025
> URL: https://issues.apache.org/jira/browse/YARN-6025
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: capacity scheduler, scheduler
> Reporter: Naganarasimha G R
> Assignee: Naganarasimha G R
> Fix For: 2.9.0, 3.0.0-alpha2
>
> Attachments: YARN-6025.002.patch, YARN-6025.01.patch
>
>
> YARN-3139 does optimization on the locks by introducing
> ReentrantReadWriteLock to remove synchronized locks, but still seems to have
> some synchronization locks in AbstractYarnScheduler and its hierarchy
> because of nonavailibility of read write locks in Fifo scheduler.
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