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https://issues.apache.org/jira/browse/HBASE-19126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16234414#comment-16234414
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Yi Liang commented on HBASE-19126:
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Hi [~mdrob]
yes, I am working on this one, I am recently read code about this part and
found some problems, will open sub jiras to fix the issues. If you are
interested, you can also 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
> Priority: Major
> 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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