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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2014/11/19 01:08:35 UTC

[jira] [Commented] (HBASE-12529) Use ThreadLocalRandom for RandomQueueBalancer

    [ https://issues.apache.org/jira/browse/HBASE-12529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14217094#comment-14217094 ] 

stack commented on HBASE-12529:
-------------------------------

+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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