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Posted to user@hbase.apache.org by Norbert Burger <no...@gmail.com> on 2014/03/27 02:40:23 UTC

regex filters and scanner caching

Hi folks -- we're currently on HBase from CDH 4.1.2 (0.92.1 + patches).

We recently ran into a consistently-reproducible scenario where applying a
RegexStringComparator within a RowFilter returned different and incomplete
results depending on the value of hbase.client.scanner.caching.

This sounds a bit like what Ted was referring to in
http://search-hadoop.com/m/I0Svh17T90F, but I'm unable to find the relevant
JIRA.

Admittedly, 4.1.2 is a bit dated now, but my sense was that this was an old
bug fixed some time ago.  Has anyone else run into this and/or could
provide more info?

Thanks,
Norbert

Re: regex filters and scanner caching

Posted by Norbert Burger <no...@gmail.com>.

Thanks Ted.  I'll try to extract a unit test.

Norbert


On Wed, Mar 26, 2014 at 9:46 PM, Ted Yu <yu...@gmail.com> wrote:

> I read the referenced thread one more time but didn't find mentioning of
> scanner caching.
>
> Are you able to come up with a unit test that reproduces the problem ?
>
> Thanks
>
>
> On Wed, Mar 26, 2014 at 6:40 PM, Norbert Burger <norbert.burger@gmail.com
> >wrote:
>
> > Hi folks -- we're currently on HBase from CDH 4.1.2 (0.92.1 + patches).
> >
> > We recently ran into a consistently-reproducible scenario where applying
> a
> > RegexStringComparator within a RowFilter returned different and
> incomplete
> > results depending on the value of hbase.client.scanner.caching.
> >
> > This sounds a bit like what Ted was referring to in
> > http://search-hadoop.com/m/I0Svh17T90F, but I'm unable to find the
> > relevant
> > JIRA.
> >
> > Admittedly, 4.1.2 is a bit dated now, but my sense was that this was an
> old
> > bug fixed some time ago.  Has anyone else run into this and/or could
> > provide more info?
> >
> > Thanks,
> > Norbert
> >
>

Re: regex filters and scanner caching

Posted by Ted Yu <yu...@gmail.com>.

I read the referenced thread one more time but didn't find mentioning of
scanner caching.

Are you able to come up with a unit test that reproduces the problem ?

Thanks


On Wed, Mar 26, 2014 at 6:40 PM, Norbert Burger <no...@gmail.com>wrote:

> Hi folks -- we're currently on HBase from CDH 4.1.2 (0.92.1 + patches).
>
> We recently ran into a consistently-reproducible scenario where applying a
> RegexStringComparator within a RowFilter returned different and incomplete
> results depending on the value of hbase.client.scanner.caching.
>
> This sounds a bit like what Ted was referring to in
> http://search-hadoop.com/m/I0Svh17T90F, but I'm unable to find the
> relevant
> JIRA.
>
> Admittedly, 4.1.2 is a bit dated now, but my sense was that this was an old
> bug fixed some time ago.  Has anyone else run into this and/or could
> provide more info?
>
> Thanks,
> Norbert
>