https://issues.apache.org/jira/browse/LUCENE-2348 suggests there are
long-standing and probably still current issues with DuplicateFilter
and multiple segments. I'm not sure if this could explain what you
are seeing. You could try calling optimize(1) on your index writer
and see if that makes a difference.
--
Ian.
On Thu, Aug 30, 2012 at 11:58 AM, Stäbler, Christoph (IT/I4Z)
<christoph.staeb...@ww-informatik.de> wrote:
> Hey,
>
> I have an index with documentations of our products. The documentfields are:
>
> group
> name
> version
> description
>
> Because most of the documentations contains several sites I create for each
> site one document in the index. So when I am searching for a product by
> group, name and version I get a few results. But sometime I want for this
> combination (group, name and version) only one result (regardless how many
> documents exists for the product).
>
> Therefor I use the DuplicateFilter:
>
> Because this filter can only be used on one field (and not on
> fieldcombinations) I created another field (productkey). In this field I
> stored an id for this product (md5Hashvalue of the combination of group, name
> and version fields). Then I told the DuplicateFilter to use this field to
> filter duplicates.
>
> But now I got not all the expected searchresults. i.e:
>
> All documents without filter:
>
> group | name | version | productkey | description
> a | one | 1.0 | 808d8f96138b7dec7cc69c2769176424 | ...
> a | two | 1.0 | 0225635fc76ed8b88c65c7eb9f2ec1f9 | ...
> a | two | 1.0 | 0225635fc76ed8b88c65c7eb9f2ec1f9 | ...
> a | three| 1.0 | 621e2597b189ee8d9448f6bfb26c5a8f | ...
> a | three| 1.0 | 621e2597b189ee8d9448f6bfb26c5a8f | ...
> a | three| 1.0 | 621e2597b189ee8d9448f6bfb26c5a8f | ...
> a | three| 1.0 | 621e2597b189ee8d9448f6bfb26c5a8f | ...
> a | three| 1.0 | 621e2597b189ee8d9448f6bfb26c5a8f | ...
> a | four | 1.0 | 3d03056a0d0f29f63477ee1f130b7ae8 | ...
> a | four | 1.0 | 3d03056a0d0f29f63477ee1f130b7ae8 | ...
> a | four | 1.0 | 3d03056a0d0f29f63477ee1f130b7ae8 | ...
> a | four | 1.0 | 3d03056a0d0f29f63477ee1f130b7ae8 | ...
> a | four | 1.0 | 3d03056a0d0f29f63477ee1f130b7ae8 | ...
> a | four | 1.0 | 3d03056a0d0f29f63477ee1f130b7ae8 | ...
> a | five | 1.0 | b2d49bc320325007e1466a38e41ce69a | ...
> a | five | 1.0 | b2d49bc320325007e1466a38e41ce69a | ...
> a | five | 1.0 | b2d49bc320325007e1466a38e41ce69a | ...
> a | five | 1.0 | b2d49bc320325007e1466a38e41ce69a | ...
> a | five | 1.0 | b2d49bc320325007e1466a38e41ce69a | ...
> zz | one | 1.0 | b610a470c9a7d2cc928725e1fb1a577a | ...
> zz | one | 1.0 | b610a470c9a7d2cc928725e1fb1a577a | ...
> zz | one | 1.0 | b610a470c9a7d2cc928725e1fb1a577a | ...
> zz | two | 1.0 | f5bb84453af30dd5f229d04cdb787dec | ...
> zz | three| 1.0 | 4b86d91feded953e57fb3d1ccbf0fc6e | ...
> zz | three| 1.0 | 4b86d91feded953e57fb3d1ccbf0fc6e | ...
> zz | three| 1.0 | 4b86d91feded953e57fb3d1ccbf0fc6e | ...
>
> Results with filter:
>
> group | name | version | productkey
> a | two | 1.0 | 0225635fc76ed8b88c65c7eb9f2ec1f9
> a | three| 1.0 | 621e2597b189ee8d9448f6bfb26c5a8f
> zz | two | 1.0 | f5bb84453af30dd5f229d04cdb787dec
>
> so I am missing these results:
>
> group | name | version | productkey
> a | one | 1.0 | 808d8f96138b7dec7cc69c2769176424
> a | four | 1.0 | 3d03056a0d0f29f63477ee1f130b7ae8
> a | five | 1.0 | b2d49bc320325007e1466a38e41ce69a
> zz | one | 1.0 | b610a470c9a7d2cc928725e1fb1a577a
> zz | three| 1.0 | 4b86d91feded953e57fb3d1ccbf0fc6e
>
>
> Here is my code to instantiate the filter:
>
> DuplicateFilter filter = new DuplicateFilter("productkey");
> filter.setKeepMode(DuplicateFilter.KM_USE_FIRST_OCCURRENCE);
> filter.setProcessingMode(DuplicateFilter.PM_FULL_VALIDATION);
>
> I am using Lucene-core Version 3.6 and lucene-queries (contains the
> DuplicatFilter Class) Version 3.6.1.
> The productkey field uses no analyzer.
>
> Did I make a mistake or is it a bug in the duplicateFilter (maybe to long
> fieldvalues, etc.)?
>
> Thanks for your help
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