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https://issues.apache.org/jira/browse/HBASE-2409?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12859204#action_12859204
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stack commented on HBASE-2409:
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Just to note that this does not happen all the time. I've seen it where
daughters go to different regionservers. We need to fix it though so the load
balancer only cuts in at an extreme. Currently its responsible for reams of
needless churn, least as best as I can see.
> Daughters deployed to parents regionserver node, always
> -------------------------------------------------------
>
> Key: HBASE-2409
> URL: https://issues.apache.org/jira/browse/HBASE-2409
> Project: Hadoop HBase
> Issue Type: Bug
> Reporter: stack
> Fix For: 0.20.5, 0.21.0
>
>
> Ryan apparently said this 6 months ago, that on split, the regions are
> assigned back to the parent hosting regionserver almost always. Then, to
> keep up some kinda balance, the load balancer kicks and closes the just
> opened daughters -- which have just been opened a moment ago -- to deploy
> them elsewhere in the name of keeping good balance.
> This issue is to confirm the above behavior indeed happens and then to take
> action to make it so at least one of the daughters is held up so it doesn't
> go back to the current heartbeating host, the parent hosting server.
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