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https://issues.apache.org/jira/browse/HBASE-19126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16291231#comment-16291231
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stack commented on HBASE-19126:
-------------------------------
Moving out an important but nice-to-have issue.
> [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
>
>
> // 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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