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https://issues.apache.org/jira/browse/HBASE-18946?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack updated HBASE-18946:
--------------------------
    Attachment: HBASE-18946.master.007.patch

> 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.master.001.patch, 
> HBASE-18946.master.002.patch, HBASE-18946.master.003.patch, 
> HBASE-18946.master.004.patch, HBASE-18946.master.005.patch, 
> HBASE-18946.master.006.patch, HBASE-18946.master.007.patch, 
> HBASE-18946.patch, HBASE-18946.patch, HBASE-18946_2.patch, 
> HBASE-18946_2.patch, HBASE-18946_simple_7.patch, HBASE-18946_simple_8.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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