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https://issues.apache.org/jira/browse/HBASE-21745?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16893091#comment-16893091
 ] 

stack commented on HBASE-21745:
-------------------------------

HBASE-22723 is about reporting holes, overlaps, etc. found during 
catalogjanitor scans.  [~zghaobac] over in HBASE-22709 adds a chore that runs 
in Master that finds 'problematic regions' -- i.e. old hbck1 findings such as 
orphans in HDFS, regions on RS not in hbase:meta, etc. -- and then shows them 
on a new 'hbck report' page added to the UI (HBASE-22527 had added listing 
problematic regions on the head of the main master UI but HBASE-22709 moves the 
info to a dedicated page). After HBASE-22709 and HBASE-22723 go in, will add to 
the new 'hbck report' the findings from HBASE-22723 so also shows in UI.

TODO:
 * HOWTO fix it doc added inline into 'hbck report' page
 * shell command to regenerate the 'hbck report' so shows fresher info.

For now, fix-it is hbck2 tool. Later, we might consider moving fixing into the 
shell to a new hbck command.

> Make HBCK2 be able to fix issues other than region assignment
> -------------------------------------------------------------
>
>                 Key: HBASE-21745
>                 URL: https://issues.apache.org/jira/browse/HBASE-21745
>             Project: HBase
>          Issue Type: Umbrella
>          Components: hbase-operator-tools, hbck2
>            Reporter: Duo Zhang
>            Assignee: stack
>            Priority: Critical
>
> This is what [~apurtell] posted on mailing-list, HBCK2 should support
>  * -Rebuild meta from region metadata in the filesystem, aka offline meta 
> rebuild.-
>  * -Fix assignment errors (undeployed regions, double assignments (yes, 
> should not be possible), etc)- (See 
> https://issues.apache.org/jira/browse/HBASE-21745?focusedCommentId=16888302&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16888302)
>  * Fix region holes, overlaps, and other errors in the region chain
>  * Fix failed split and merge transactions that have failed to roll back due 
> to some bug (related to previous)
>  *  -Enumerate store files to determine file level corruption and sideline 
> corrupt files-
>  * -Fix hfile link problems (dangling / broken)-



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