Deleted documents remain in the Lucene index until an "optimize" or segment
merge operation removes them. As a result they are still counted in document
frequency. An update is a combination of a delete and an add of a fresh
document.
-- Jack Krupansky
-----Original Message-----
From: Johannes Siegert
Sent: Tuesday, July 22, 2014 7:26 AM
To: solr-user@lucene.apache.org
Subject: wrong docFreq while executing query based on uniqueKey-field
Hi.
My solr-index (version=4.7.2.) has an id-field:
<field name="id" type="string" indexed="true" stored="true"/>
...
<uniqueKey>id</uniqueKey>
The index will be updated once per hour.
I use the following query to retrieve some documents:
"q=id:2^2 id:1^1"
I would expect that the document(2) should be always before the
document(1). But after many index updates document(1) is before document(2).
With debug=true I could see the problem. The document(1) has a
docFreq=2, while the document(2) has a docFreq=1.
How could the docFreq of the uniqueKey-field be hight than 1? Could
anyone explain this behavior to me?
Thanks!
Johannes
