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https://issues.apache.org/jira/browse/HELIX-779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16671989#comment-16671989
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ASF GitHub Bot commented on HELIX-779:
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Github user asfgit closed the pull request at:
https://github.com/apache/helix/pull/285
> Maintenance rebalancer should not clear preference list in ideal state
> ----------------------------------------------------------------------
>
> Key: HELIX-779
> URL: https://issues.apache.org/jira/browse/HELIX-779
> Project: Apache Helix
> Issue Type: Bug
> Components: helix-core
> Reporter: Harry Zhang
> Assignee: Harry Zhang
> Priority: Major
>
> Setting list fields to empty map will prevent newly added and initially
> rebalanced resources during maintenance mode from getting re-balanced after
> cluster exists maintenance mode.
> The right thing to do is to clear every preference list.
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