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https://issues.apache.org/jira/browse/HBASE-19021?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Biju Nair updated HBASE-19021:
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Component/s: Balancer
> Restore a few important missing logics for balancer in 2.0
> ----------------------------------------------------------
>
> Key: HBASE-19021
> URL: https://issues.apache.org/jira/browse/HBASE-19021
> Project: HBase
> Issue Type: Bug
> Components: Balancer
> Reporter: Jerry He
> Assignee: Jerry He
> Priority: Critical
> Fix For: 2.0.0-alpha-4, 2.0.0
>
> Attachments: HBASE-19021-master-v2.patch, HBASE-19021-master.patch,
> HBASE-19021-master.patch
>
>
> After looking at the code, and some testing, I see the following things are
> missing for balancer to work properly after AMv2.
> # hbase.master.loadbalance.bytable is not respected. It is always 'bytable'.
> Previous default is cluster wide, not by table.
> # Servers with no assignments is not added for balance consideration.
> # Crashed server is not removed from the in-memory server map in
> RegionStates, which affects balance.
> # Draining marker is not respected when balance.
> Also try to re-enable {{TestRegionRebalancing}}, which has a
> {{testRebalanceOnRegionServerNumberChange}}
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