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https://issues.apache.org/jira/browse/HBASE-4377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13122344#comment-13122344
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Jonathan Hsieh commented on HBASE-4377:
---------------------------------------
In the 0.90 branch, after deleting meta and restarting the # of tables present
is 0.
In trunk and 0.92 branch, after deleting meta and restart the # of tables
present is 1.
This actually does make sense because HBASE-451 changed the behavior of HMaster
-- in 0.90 (pre-HBASE-451) it HConnectionManager.listTables() loads table info
on the client side via a meta scan. Post HBASE-451, table data from
HConnectionManager.listTables() comes from the files system and is cached by
the HMaster, and ignores the meta table.
> [hbck] Offline rebuild .META. from fs data only.
> ------------------------------------------------
>
> Key: HBASE-4377
> URL: https://issues.apache.org/jira/browse/HBASE-4377
> Project: HBase
> Issue Type: New Feature
> Reporter: Jonathan Hsieh
> Assignee: Jonathan Hsieh
> Attachments:
> 0001-HBASE-4377-hbck-Offline-rebuild-.META.-from-fs-data-.patch,
> hbase-4377-trunk.v2.patch
>
>
> In a worst case situation, it may be helpful to have an offline .META.
> rebuilder that just looks at the file system's .regioninfos and rebuilds meta
> from scratch. Users could move bad regions out until there is a clean
> rebuild.
> It would likely fill in region split holes. Follow on work could given
> options to merge or select regions that overlap, or do online rebuilds.
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