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https://issues.apache.org/jira/browse/HBASE-26311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17428941#comment-17428941
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Clara Xiong commented on HBASE-26311:
-------------------------------------
Square deviation caused serious regression on some scenario with the absolution
max cost too high that brought down the absolute scaled cost too low. It would
require significant tuning on weight factors. I switched back to original
proposal of standard deviation in
https://issues.apache.org/jira/browse/HBASE-25625 to normalize the value.
> Balancer gets stuck in cohosted replica distribution
> ----------------------------------------------------
>
> Key: HBASE-26311
> URL: https://issues.apache.org/jira/browse/HBASE-26311
> Project: HBase
> Issue Type: Bug
> Components: Balancer
> Reporter: Clara Xiong
> Assignee: Clara Xiong
> Priority: Major
>
> In production, we found a corner case where balancer cannot make progress
> when there is cohosted replica. This is repro'ed on master branch using test
> added in HBASE-26310.
>
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