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https://issues.apache.org/jira/browse/HBASE-20997?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16567561#comment-16567561
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huaxiang sun commented on HBASE-20997:
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I will go back to check if it applies to master branch, focusing on a branch-1
fix first.
> rebuildUserRegions() does not build ReplicaMapping during master switchover
> ---------------------------------------------------------------------------
>
> Key: HBASE-20997
> URL: https://issues.apache.org/jira/browse/HBASE-20997
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 1.2.6, 1.3.2, 1.5.0, 1.4.6
> Reporter: huaxiang sun
> Assignee: huaxiang sun
> Priority: Major
>
> During master switchover, rebuildUserRegions() does not rebuild master
> in-memory defaultReplicaToOtherReplicas map. This puts the cluster in an
> inconsistent state. In read replica case, it causes replica parent region
> stay online without being unassigned.
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