Duplicates results when using a non optimized index

[Tim Mahy]

Hi all,

is this expected behavior when having an index like this :

numDocs : 9479963
maxDoc : 12622942
readerImpl : MultiReader

which is in the process of optimizing that when we search through the index we 
get this :

<doc>
<long name="id">15257559</long>
</doc>
<doc>
<long name="id">15257559</long>
</doc>
<doc>
<long name="id">17177888</long>
</doc>
<doc>
<long name="id">11825631</long>
</doc>
<doc>
<long name="id">11825631</long>
</doc>

The id field is declared like this :
    <field name="id" type="long" indexed="true" stored="true" required="true" />

and is set as the unique identity like this in the schema xml :
  <uniqueKey>id</uniqueKey>

so the question : is this expected behavior and if so is there a way to let 
Solr only return unique documents ?

greetings and thanx in advance,
Tim




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