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From "Aaron Kimball (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-2437) Cannot create splits with MSBit set in MSByte via API
Date Fri, 07 Mar 2014 06:34:43 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-2437?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13923620#comment-13923620
] 

Aaron Kimball commented on ACCUMULO-2437:
-----------------------------------------

I also tried ranging i from -127 to 127 for good measure.


For what its worth, the following lines do work in the Accumulo shell:

{code}addsplits \x80 -t entity_test
addsplits \x81 -t entity_test
addsplits \x82 -t entity_test
...{code}

so its possible to add the high-bit byte-centric splits there. I think the limitation is in
the API's use of Text more than a fundamental implementation detail


> Cannot create splits with MSBit set in MSByte via API 
> ------------------------------------------------------
>
>                 Key: ACCUMULO-2437
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2437
>             Project: Accumulo
>          Issue Type: Bug
>    Affects Versions: 1.5.1
>            Reporter: Aaron Kimball
>
> I cannot create a table with 256 evenly-sliced splits using the API. I believe due to
the fact that Text can only hold valid Unicode characters, the following only generates 129
splits:
> {code}
>     TableOperations tableOps = connector.tableOperations();
>     TreeSet<Text> splits = new TreeSet<Text>();
>     for (int i = 0; i < 256; i++) { 
>       byte[] bytes = { (byte) i };
>       String theStr = new String(bytes);
>       splits.add(new Text(theStr));
>     } 
>     tableOps.addSplits(TABLE_NAME, splits);
> {code}
> Using {{getsplits}} in the shell, I see the highest split be 0x7F; while we can use byte
values 0x80 through 0xFF as leading bytes in row keys, the use of {{Text}} in the {{addSplits()}}
method makes these invalid strings to split on.



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