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https://issues.apache.org/jira/browse/HBASE-12529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14217094#comment-14217094
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stack commented on HBASE-12529:
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+1 Was going to go through our code base and see where we could use this java7
feature in place of expensive new Randoms. Thanks [~mbertozzi]
> Use ThreadLocalRandom for RandomQueueBalancer
> ---------------------------------------------
>
> Key: HBASE-12529
> URL: https://issues.apache.org/jira/browse/HBASE-12529
> Project: HBase
> Issue Type: Improvement
> Components: IPC/RPC
> Affects Versions: 2.0.0, 0.99.1, 0.98.6.1
> Reporter: Matteo Bertozzi
> Assignee: Matteo Bertozzi
> Priority: Minor
> Fix For: 2.0.0, 0.98.9, 0.99.2
>
> Attachments: HBASE-12529-v0.patch
>
>
> looks like the Random in RandomQueueBalancer is now the main cause of
> contention in the rpc queue insertion. we should replace that Random with a
> ThreadLocalRandom.
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