[jira] [Commented] (HBASE-11290) Unlock RegionStates

["Mikhail Antonov (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-11290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14127773#comment-14127773 ] 

Mikhail Antonov commented on HBASE-11290:
-----------------------------------------

(I looked at the puts for the collections and seems there are no places where partially-initialized objects can escape and gets published outside the scope of locks)

> Unlock RegionStates
> -------------------
>
>                 Key: HBASE-11290
>                 URL: https://issues.apache.org/jira/browse/HBASE-11290
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Francis Liu
>            Assignee: Francis Liu
>         Attachments: HBASE-11290.draft.patch
>
>
> Even though RegionStates is a highly accessed data structure in HMaster. Most of it's methods are synchronized. Which limits concurrency. Even simply making some of the getters non-synchronized by using concurrent data structures has helped with region assignments. We can go as simple as this approach or create locks per region or a bucket lock per region bucket.



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