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From Ted Yu <yuzhih...@gmail.com>
Subject Re: Delete.deleteColumns not working with HFileOutputFormat?
Date Tue, 21 Oct 2014 16:05:40 GMT
bq. When using Delete#deleteColumns everything seems to be working fine

Please confirm that the issue you observe was with Delete#deleteColumn
(different from the method mentioned in subject).

Can you tried with 0.94.24 (the latest 0.94 release) ?

If you can capture this using a unit test, that would great.


On Tue, Oct 21, 2014 at 8:23 AM, Jan Lukavsk√Ĺ <jan.lukavsky@firma.seznam.cz>

> Hi all,
> we are using HBase version 0.94.6-cdh4.3.1 and I have a suspicion that a
> Delete written to hbase through HFileOutputFormat might be ignored (and not
> delete any data) in the following scenario:
>  * a Delete object is used to delete the data at the client side
>  * call to "deleteColumn" instead of "deleteColumns" is used, which means
> that the underlaying KeyValue will not have an associated timestamp (will
> have HConstants.LATEST_TIMESTAMP)
>  * the Delete object is then converted to KeyValues and these are written
> into the output format's record writer
> I think (our systems seems to behave this way) the problem is in the way
> the KeyValue is processed in the RegionServer, even though I was not able
> to track the problem in the source code. Can anyone else confirm this? When
> using Delete#deleteColumns everything seems to be working fine (the
> KeyValues have different type). Is this expected or should it be considered
> a bug? And if so, where it should be fixed? I think it could be on the side
> of the record writer (maybe by throwing an exception), or in the region
> server (if possible, this might be non-trivial, because of the
> Delete#deleteColumn semantics).
> Any opinions?
> Thanks,
>  Jan

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