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https://issues.apache.org/jira/browse/HADOOP-2296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12547103
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Hudson commented on HADOOP-2296:
--------------------------------
Integrated in Hadoop-Nightly #318 (See
[http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Nightly/318/])
> hbase shell: phantom columns show up from select command
> --------------------------------------------------------
>
> Key: HADOOP-2296
> URL: https://issues.apache.org/jira/browse/HADOOP-2296
> Project: Hadoop
> Issue Type: Bug
> Components: contrib/hbase
> Affects Versions: 0.15.0
> Reporter: Michael Bieniosek
> Assignee: stack
> Attachments: 2296.patch
>
>
> {code}
> Hbase> select * from hbase_test where row='2';
> +--------------------------------------+--------------------------------------+
> | Column | Cell
> |
> +--------------------------------------+--------------------------------------+
> | test:a | a
> |
> +--------------------------------------+--------------------------------------+
> | test:c | c
> |
> +--------------------------------------+--------------------------------------+
> 2 row(s) in set (0.00 sec)
> Hbase> select * from hbase_test where row='1';
> +--------------------------------------+--------------------------------------+
> | Column | Cell
> |
> +--------------------------------------+--------------------------------------+
> | test:a | a
> |
> +--------------------------------------+--------------------------------------+
> | test:b | b
> |
> +--------------------------------------+--------------------------------------+
> 2 row(s) in set (0.00 sec)
> Hbase> select * from hbase_test;
> +-------------------------+-------------------------+-------------------------+
> | Row | Column | Cell
> |
> +-------------------------+-------------------------+-------------------------+
> | 1 | test:a | a
> |
> +-------------------------+-------------------------+-------------------------+
> | 1 | test:b | b
> |
> +-------------------------+-------------------------+-------------------------+
> | 2 | test:a | a
> |
> +-------------------------+-------------------------+-------------------------+
> | 2 | test:b | b
> |
> +-------------------------+-------------------------+-------------------------+
> | 2 | test:c | c
> |
> +-------------------------+-------------------------+-------------------------+
> 5 row(s) in set (0.14 sec)
> {code}
> Note the phantom value for test:b in row 2.
> I looked at the code, and it looks like SelectCommand.scanPrint incorrectly
> fails to call results.clear() every time it calls scan.next().
> However, I also think that the HScannerInterface.next(HStoreKey key,
> SortedMap<Text,byte[]> results) is confusing, since it requires the user to
> call results.clear() and key.clear() before calling next each time. Since
> the Iterable interface that provides the zero-arg next has been added, I
> suggest that it might be worthwhile to deprecate the two-arg next.
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