[jira] [Commented] (HBASE-19126) [AMv2] RegionStates/RegionStateNode needs cleanup

["Mike Drob (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-19126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16227636#comment-16227636 ] 

Mike Drob commented on HBASE-19126:
-----------------------------------

[~easyliangjob] - do you want to work on this one?

> [AMv2] RegionStates/RegionStateNode needs cleanup
> -------------------------------------------------
>
>                 Key: HBASE-19126
>                 URL: https://issues.apache.org/jira/browse/HBASE-19126
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Yi Liang
>             Fix For: 2.0.0-beta-1
>
>
>   // Mutable/Immutable? Changes have to be synchronized or not?
>   // Data members are volatile which seems to say multi-threaded access is fine.
>   // In the below we do check and set but the check state could change before
>   // we do the set because no synchronization....which seems dodgy. Clear up
>   // understanding here... how many threads accessing? Do locks make it so one
>   // thread at a time working on a single Region's RegionStateNode? Lets presume
>   // so for now. Odd is that elsewhere in this RegionStates, we synchronize on
>   // the RegionStateNode instance
> Copied from TODO in RegionState.java
> Open this jira to track some cleanups for RegionStates/RegionStateNode



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