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https://issues.apache.org/jira/browse/HBASE-25767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17318807#comment-17318807
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Duo Zhang commented on HBASE-25767:
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OK, I think the problem is CandidateGenerator.getRandomIterationOrder is
extremely slow when the number of regions is very large.
Let me try to change the algorithm.
> The masterServices field in LocalityBasedCandidateGenerator is useless
> ----------------------------------------------------------------------
>
> Key: HBASE-25767
> URL: https://issues.apache.org/jira/browse/HBASE-25767
> Project: HBase
> Issue Type: Improvement
> Components: Balancer
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Priority: Major
>
> Similar to HBASE-25759, it is just used to test whether we should skip
> calculation, but in production masterServices will never be null.
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