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https://issues.apache.org/jira/browse/HBASE-18946?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16210767#comment-16210767
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ramkrishna.s.vasudevan commented on HBASE-18946:
------------------------------------------------
bq.Do we need to apply the same collection logic to EnableTableProcedure (to
address the TODO in the comment)?
Yes it could be. But with HBASE-19017 it may not be needed because we know
where the assignment would go.
But before I commit this I would like to spend some more time to understand if
there could be any other issues with how the procedure pool executes and we
could starve other threads from adding to the assignQueue and only the other
threads keep retrying which I think happened when I tried doing the same for
enableTablePRocedure. But HBASE-19017 we are safe.
And thanks a lot for the review [~huaxiang].
> Stochastic load balancer assigns replica regions to the same RS
> ---------------------------------------------------------------
>
> Key: HBASE-18946
> URL: https://issues.apache.org/jira/browse/HBASE-18946
> Project: HBase
> Issue Type: Bug
> Affects Versions: 2.0.0-alpha-3
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Fix For: 2.0.0-beta-1
>
> Attachments: HBASE-18946.patch, HBASE-18946.patch,
> TestRegionReplicasWithRestartScenarios.java
>
>
> Trying out region replica and its assignment I can see that some times the
> default LB Stocahstic load balancer assigns replica regions to the same RS.
> This happens when we have 3 RS checked in and we have a table with 3
> replicas. When a RS goes down then the replicas being assigned to same RS is
> acceptable but the case when we have enough RS to assign this behaviour is
> undesirable and does not solve the purpose of replicas.
> [~huaxiang] and [~enis].
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