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https://issues.apache.org/jira/browse/HBASE-18102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16111949#comment-16111949
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Umesh Agashe commented on HBASE-18102:
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+1 lgtm
> [SHELL] Purge close_region command that allows by-pass of Master
> ----------------------------------------------------------------
>
> Key: HBASE-18102
> URL: https://issues.apache.org/jira/browse/HBASE-18102
> Project: HBase
> Issue Type: Sub-task
> Components: Operability, shell
> Reporter: stack
> Assignee: Appy
> Fix For: 2.0.0
>
> Attachments: HBASE-18102.master.001.patch
>
>
> In AMv2, if a RS is not aligned with Master notions of how the world is, then
> the Master will kill the deviant RS (TODO: is forcing compliance via less
> radical means -- but that is how it is currently).
> The shell currently allows by-passing the Master to make cluster
> modifications such as our being able to send a close directly to a
> RegionServer for it to execute locally. This facility was used in the past to
> do fix-up when Master lost account of Region locations. In the new regime,
> such mis-accounting should no longer happen and, should a user mistakenly do
> an explicit close against a RS, the consequences will be more than the user
> bargained for; the Master will shut down the RS as soon as it reports close
> of a Region the master thinks should be open (No independence allowed!).
> This issue is to review shell Region and Table manipulation commands to purge
> those that by-pass Master or at least to add big warning.
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