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https://issues.apache.org/jira/browse/HBASE-12007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14139151#comment-14139151
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Jimmy Xiang commented on HBASE-12007:
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I meant any region that is assigned to the master. In branch-1,
StochasticBalancer could assign some region to the master since there is no
region on it, per the region count skew cost function, then the balancer will
move the region away in the another run, which causes the flakiness of
TestRegionRebalancing. With this patch, we leave balancing regions on the
master server to the base balancer instead of StochasticBalancer.
> StochasticBalancer should avoid putting user regions on master
> --------------------------------------------------------------
>
> Key: HBASE-12007
> URL: https://issues.apache.org/jira/browse/HBASE-12007
> Project: HBase
> Issue Type: Bug
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Attachments: hbase-12007.patch
>
>
> We should enhance how StochasticBalancer picks up a random server so that it
> can avoid putting user regions on master, because regions on master are
> handled differently in a separate method.
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