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From "Elliott Clark (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12839) Remove synchronization in ServerStatisticsTracker
Date Mon, 12 Jan 2015 20:47:35 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14274145#comment-14274145
] 

Elliott Clark commented on HBASE-12839:
---------------------------------------

Don't you need to re-assign stats if the put if absent returns something different?

> Remove synchronization in ServerStatisticsTracker
> -------------------------------------------------
>
>                 Key: HBASE-12839
>                 URL: https://issues.apache.org/jira/browse/HBASE-12839
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 2.0.0
>            Reporter: Andrew Purtell
>            Assignee: Andrew Purtell
>            Priority: Minor
>             Fix For: 2.0.0
>
>         Attachments: HBASE-12839.patch
>
>
> Remove synchronization in ServerStatisticTracker. We can use putIfAbsent instead of a
synchronized block to add ServerStatistic objects to the concurrent statistics hashmap. 



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