wchevreuil commented on pull request #3574:
URL: https://github.com/apache/hbase/pull/3574#issuecomment-897583443


   > After reviewing the code for CatalogJanitor, I do not think it will clean 
the partial regions on FileSystem, as I haven't seen any related code about 
scanning the table directory on FileSystem, it just scans the meta table.
   > 
   > So in general, I think we should change the rollback code in 
SplitTableRegionProcedure and MergeTableRegionsProcedure, to remove the 
paritial regions when rolling back.
   > 
   > And I think we should also have a tool in HBCK2 to remove the partial 
regions.
   > 
   > Thanks.
   
   Yep, had just found the same. Had added the cleanup logic on the rollback. I 
will work on hbck2 on a separate issue.


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