Karan Mehta commented on HBASE-18228:

[~lhofhansl] A patch was attempted for this JIRA. However it doesn't seem as 
useful as expected. Would you mind to discuss other potential improvements here?
FYI, this issue is specifically addressing branch-1.3 (possibly 1.4).

> HBCK improvements
> -----------------
>                 Key: HBASE-18228
>                 URL: https://issues.apache.org/jira/browse/HBASE-18228
>             Project: HBase
>          Issue Type: Improvement
>          Components: hbck
>            Reporter: Lars Hofhansl
>            Assignee: Karan Mehta
>            Priority: Critical
>             Fix For: 1.5.0, 1.4.3
>         Attachments: HBASE-18228.branch-1.3.patch
> We just had a prod issue and running HBCK the way we did actually causes more 
> problems.
> In part HBCK did stuff we did not expect, in part we had little visibility 
> into what HBCK was doing, and in part the logging was confusing.
> I'm proposing 2 improvements:
> 1. A dry-run mode. Run, and just list what would have been done.
> 2. An interactive mode. Run, and for each action request Y/N user input. So 
> that a user can opt-out of stuff.
> [~jmhsieh], FYI

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