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From "Todd Lipcon (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4377) [hbck] Offline rebuild .META. from fs data only.
Date Thu, 06 Oct 2011 22:15:30 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13122354#comment-13122354
] 

Todd Lipcon commented on HBASE-4377:
------------------------------------

bq. Post HBASE-451, table data from HConnectionManager.listTables() comes from the files system
and is cached by the HMaster, and ignores the meta table

This seems like a bug - clients should never have to have direct access to HDFS! I filed HBASE-4548
                
> [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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