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From "Jerry He (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-19021) Restore a few important missing logics for balancer in 2.0
Date Mon, 23 Oct 2017 04:50:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-19021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16214636#comment-16214636
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Jerry He commented on HBASE-19021:
----------------------------------

Are you good with the patch?  [~stack], [~yuzhihong@gmail.com]
Any other comment from others?

> 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
>            Reporter: Jerry He
>            Assignee: Jerry He
>            Priority: Critical
>         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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