Hi folks!

I think we no longer support OfflineMetaRepair in HBase-2.x and it has a
critical bug that breaks the meta data:
https://issues.apache.org/jira/browse/HBASE-21665

Actually, I have seen several cases where some users ran OfflineMetaRepair
mistakenly in their cluster and corrupted their meta data.

Also, new meta rebuilding tool is being developed by Wellington at the
moment in HBCK2:
https://issues.apache.org/jira/browse/HBASE-22567

So I think we can remove OfflineMetaRepair in the master branch and
branch-2+. What do you think?

If no objections, I'll file this in Apache Jira.

Regards,
Toshi

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