[jira] [Work started] (HBASE-12717) Pre-split algorithm in HBaseAdmin.create() can not find the split point

["Weichen Ye (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-12717?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HBASE-12717 started by Weichen Ye.
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> Pre-split algorithm in HBaseAdmin.create() can not find the split point
> -----------------------------------------------------------------------
>
>                 Key: HBASE-12717
>                 URL: https://issues.apache.org/jira/browse/HBASE-12717
>             Project: HBase
>          Issue Type: Bug
>          Components: Admin
>    Affects Versions: 0.98.6
>            Reporter: Weichen Ye
>            Assignee: Weichen Ye
>            Priority: Critical
>
> When we set the start key and the end key in the function:
> createTable(HTableDescriptor desc, byte[] startKey, byte[] endKey, int numRegions)
> The current pre-split algorithm could not find a split point between the keys like "aaa" and "aab", "1111" and "1112". 
> Example Code for this bug:
> admin.createTable(htd, Bytes.toBytes("aaa"), Bytes.toBytes("aab"), 4);
> we will get the following ERROR:
> Exception in thread "main" java.lang.IllegalArgumentException: Unable to split key range into enough regions
> 	at org.apache.hadoop.hbase.client.HBaseAdmin.createTable(HBaseAdmin.java:473)
> 	at test.JavaTest.main(JavaTest.java:28)
> We hope this pre-split algorithm should be able to calculate the split point with an additional byte. for example:
> "aaa" and "aab", split point= "aaaP"
> "1111" and "1112", split point ="1111P" 
>  



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