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From "Jonathan Hsieh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5801) [hbck] Hbck should handle case where some regions have different HTD settings in .regioninfo files (0.90 specific)
Date Thu, 26 Apr 2012 18:18:24 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13262816#comment-13262816
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Jonathan Hsieh commented on HBASE-5801:
---------------------------------------

Thanks for following through Jimmy.  Adding more flakey tests is just going to cause more
trouble down the line and it is better if we figure out and catch them before they get in!
                
> [hbck] Hbck should handle case where some regions have different HTD settings in .regioninfo
files  (0.90 specific)
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-5801
>                 URL: https://issues.apache.org/jira/browse/HBASE-5801
>             Project: HBase
>          Issue Type: Improvement
>          Components: hbck
>    Affects Versions: 0.90.7
>            Reporter: Jonathan Hsieh
>            Assignee: Jimmy Xiang
>             Fix For: 0.90.7
>
>         Attachments: hbase_5801_v2.patch
>
>
> Recently, we encountered a case where some regions in a table have different HTableDescriptor
settings serialized into HDFS their HRegionInfo .regioninfo file.  hbck expects all HTDs within
a table to be the same and currently bails out in this situation.
> We need to either point out a proper set of actions for the user to execute or automatically
convert the region to a common HTD (likely the most common on, or possibly the "first one".)
> Not sure if this requires reformatting data but may require closing and restarting a
region.
> This issue is hbase 0.90.x specific -- 0.92+ keep all table info in a single .tableinfo
file.

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