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https://issues.apache.org/jira/browse/HBASE-20278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16436399#comment-16436399
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stack commented on HBASE-20278:
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[~uagashe] You up for this one? You have good stuff going on over in
HBASE-18792... especially your list of what works and what does not.
> [DOC] include ref guide updates for HBase 2.0 HBCK
> --------------------------------------------------
>
> Key: HBASE-20278
> URL: https://issues.apache.org/jira/browse/HBASE-20278
> Project: HBase
> Issue Type: Sub-task
> Components: documentation, hbck
> Affects Versions: 2.0.0
> Reporter: Sean Busbey
> Priority: Critical
>
> Called out by [~stack] in HBASE-19158
> {quote}
> bq. HBCK tool from an earlier release against an HBase 2.0+ cluster will
> destructively alter said cluster in unrecoverable ways.
> Footnote or callout that says something like "Unfortunately we are unable to
> distinguish an HBCK client so cannot put in place guards against destructive
> HBCK changes....." .... probably too much for this startup section on reread
> of what I've written here.
> bq. As of HBase 2.0, HBCK is a read-only tool that can report the status of
> some non-public system internals. You should not rely on the format nor
> content of these internals to remain consistent across HBase releases.
> Ugh. We need HBCK2 and a pointer here to it. Will do in a follow-on.
> {quote}
> then update the upgrade section to point to the docs
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