stack commented on HBASE-22777:

.003 fix tests, checkstyle, etc.

> Add a multi-region merge (for fixing overlaps, etc.)
> ----------------------------------------------------
>                 Key: HBASE-22777
>                 URL: https://issues.apache.org/jira/browse/HBASE-22777
>             Project: HBase
>          Issue Type: Sub-task
>          Components: hbck2, proc-v2
>            Reporter: stack
>            Assignee: stack
>            Priority: Major
>         Attachments: HBASE-22777.master.001.patch, 
> HBASE-22777.master.002.patch, HBASE-22777.master.003.patch
> MergeTableRegionProcedure does two regions at a time only. We have hardcoded 
> notion that merge has an 'A' and 'B' parent.
> This issue is about making it so we merge N regions all in the one go. We 
> need this facility generally; will simplify operator's life being able to 
> merge up in one go rather than in steps of two. In particular, would make 
> fixing overlaps easier if could just merge all regions in the overlapping 
> area.

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