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From "rajeshbabu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8859) truncate_preserve should get table split keys as it is instead of converting them to string type and then again to bytes
Date Fri, 30 Aug 2013 12:29:52 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13754639#comment-13754639
] 

rajeshbabu commented on HBASE-8859:
-----------------------------------

Ted,
All split keys related APIs present only in HTable not in HTableInterface, thats why not defined
getSplitKeys() there. If we add it in HTI we need to implement it in multiple classes. If
its ok, we can add it.

                
> truncate_preserve should get table split keys as it is instead of converting them to
string type and then again to bytes
> ------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-8859
>                 URL: https://issues.apache.org/jira/browse/HBASE-8859
>             Project: HBase
>          Issue Type: Bug
>          Components: scripts
>    Affects Versions: 0.95.1
>            Reporter: rajeshbabu
>            Assignee: rajeshbabu
>             Fix For: 0.98.0, 0.96.0
>
>         Attachments: HBASE-8859-Test_to_reproduce.patch, HBASE-8859_trunk_2.patch, HBASE-8859_trunk.patch
>
>
> If we take int,long or double bytes as split keys then we are not creating table with
same split keys because converting them to strings directly and to bytes is giving different
split keys, sometimes getting IllegalArgument exception because of same split keys(converted).
Instead we can get split keys directly from HTable and pass them while creating table.
> {code}
>       h_table = org.apache.hadoop.hbase.client.HTable.new(conf, table_name)
>       splits = h_table.getRegionLocations().keys().map{|i| i.getStartKey} :byte
>       splits = org.apache.hadoop.hbase.util.Bytes.toByteArrays(splits)
> {code}
> {code}
> Truncating 'emp3' table (it may take a while):
>  - Disabling table...
>  - Dropping table...
>  - Creating table with region boundaries...
> ERROR: java.lang.IllegalArgumentException: All split keys must be unique, found duplicate:
B\x11S\xEF\xBF\xBD\xEF\xBF\xBD\xEF\xBF\xBD\x00\x00, B\x11S\xEF\xBF\xBD\xEF\xBF\xBD\xEF\xBF\xBD\x00\x00
> {code}

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