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https://issues.apache.org/jira/browse/HBASE-22813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16905759#comment-16905759
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Xiaolin Ha commented on HBASE-22813:
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I found on HBASE-22514, when master starting up, meta table will always be
assigned to a default group server. Because meta and group table is not online,
we can not get table descriptor to define which group table belongs to. So
maybe under 22514's design, default group must contains at least one server.
But I doubt if always assign meta to default when master starting up is
correct. Because meta might be actually in other groups.
> Revisit the logic of when we can remove the last server from a rsgroup and
> when can we remove a rsgroup
> -------------------------------------------------------------------------------------------------------
>
> Key: HBASE-22813
> URL: https://issues.apache.org/jira/browse/HBASE-22813
> Project: HBase
> Issue Type: Sub-task
> Reporter: Duo Zhang
> Priority: Major
>
> The logic is a bit confusing for now. We do not allow creating tables to an
> empty rs group, but it is fine to remove all the regionservers from a
> rsgroup. And we will even automatically remove region servers when
> clearDeadServers...
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