[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

["Ted Yu (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-8859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13754121#comment-13754121 ] 

Ted Yu commented on HBASE-8859:
-------------------------------

{code}
+  public byte[][] getSplitKeys() throws IOException {
{code}
Should the above method be added to HTableInterface ?
                
> 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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