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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 Wed, 25 Apr 2012 23:52:16 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13262257#comment-13262257
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Jonathan Hsieh commented on HBASE-5801:
---------------------------------------

I don't think that is good enough -- if deleteTable failing, it is an indication that the
repairs are not sufficient. 

In the original HBASE-5128, we had a 50% fail rate on some tests and tracking down the root
of the flakyness lead to the offline call to fix master/rs state, and making the HRI comparator
more specific.  

This issue feels similar and may be related to something like that...
                
> [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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