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From "Benoit Sigoure (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-3170) RegionServer confused about empty row keys
Date Fri, 29 Oct 2010 18:25:19 GMT
RegionServer confused about empty row keys
------------------------------------------

                 Key: HBASE-3170
                 URL: https://issues.apache.org/jira/browse/HBASE-3170
             Project: HBase
          Issue Type: Bug
          Components: regionserver
    Affects Versions: 0.89.20100924, 0.89.20100621
            Reporter: Benoit Sigoure


I'm no longer sure about the expected behavior when using an empty row key (e.g. a 0-byte
long byte array).  I assumed that this was a legitimate row key, just like having an empty
column qualifier is allowed.  But it seems that the RegionServer considers the empty row key
to be whatever the first row key is.
{code}
Version: 0.89.20100830, r0da2890b242584a8a5648d83532742ca7243346b, Sat Sep 18 15:30:09 PDT
2010

hbase(main):001:0> scan 'tsdb-uid', {LIMIT => 1}
ROW                           COLUMN+CELL                                                
                         
 \x00                         column=id:metrics, timestamp=1288375187699, value=foo      
 \x00                         column=id:tagk, timestamp=1287522021046, value=bar         
 \x00                         column=id:tagv, timestamp=1288111387685, value=qux      
1 row(s) in 0.4610 seconds

hbase(main):002:0> get 'tsdb-uid', ''
COLUMN                        CELL                                                       
                         
 id:metrics                   timestamp=1288375187699, value=foo                         
 id:tagk                      timestamp=1287522021046, value=bar                         
 id:tagv                      timestamp=1288111387685, value=qux                      
3 row(s) in 0.0910 seconds

hbase(main):003:0> get 'tsdb-uid', "\000"
COLUMN                        CELL                                                       
                         
 id:metrics                   timestamp=1288375187699, value=foo                         
 id:tagk                      timestamp=1287522021046, value=bar                         
 id:tagv                      timestamp=1288111387685, value=qux                      
3 row(s) in 0.0550 seconds
{code}

This isn't a parsing problem with the command-line of the shell.  I can reproduce this behavior
both with plain Java code and with my asynchbase client.

Since I don't actually have a row with an empty row key, I expected that the first {{get}}
would return nothing.

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