What version of HBase are you using ?
On Wed, Jun 16, 2010 at 9:19 PM, Chase Bradford <[email protected]>wrote:
> Hi Everyone,
>
> I've been trying to track down a problem I'm having with sorting IBWs with
> it comparator, and it seems as though the comparator doesn't work as
> expected.
>
> The problem seems to be that IBW.Comparator extends WritableComparator, but
> only overrides compareBytes. WritableComparator.compare uses IBW.compareTo
> which compares by length, then contents, as if aiming for a big-endian
> numerical comparison. Although, it's not quite a numerical comparison,
> because it doesn't account for leading 0 bytes.
>
> I stumbled on this while trying to use the TotalOrderPartitioner with a
> partition file lexicographically sorted but with values of varying lengths.
> It uses the Comparator's compare() method.
>
> Can someone explain why IBW.compareTo is implemented this way?
>
> Thanks,
> Chase
>
> My test case:
>
> import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
> public class Test
> {
> public static void main(String[] args){
> ImmutableBytesWritable ibw1 = new ImmutableBytesWritable( new
> byte[]{0x0f} );
> ImmutableBytesWritable ibw2 = new ImmutableBytesWritable( new
> byte[]{0x00, 0x00} );
> ImmutableBytesWritable.Comparator c = new
> ImmutableBytesWritable.Comparator();
>
> if( c.compare( ibw1, ibw2 ) < 0 )
> System.err.println( "ibw1 < ibw2" );
>
> System.exit(0);
> }
> }
>
