Hoss Man created SOLR-3981:
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Summary: docBoost is compounded on copyField
Key: SOLR-3981
URL: https://issues.apache.org/jira/browse/SOLR-3981
Project: Solr
Issue Type: Bug
Affects Versions: 4.0
Reporter: Hoss Man
Assignee: Hoss Man
Fix For: 4.1
As noted by Toke in a comment on SOLR-3875...
https://issues.apache.org/jira/browse/SOLR-3875?focusedCommentId=13482233&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13482233
{quote}
While boosting of multi-value fields is handled correctly in Solr 4.0.0,
boosting for copyFields are not. A sample document:
{code}
<add><doc boost="10.0">
<field name="id">Insane score Example. Score = 10E9 </field>
<field name="name">Document boost broken for copyFields</field>
<field name="manu" >video ThomasEgense and Toke Eskildsen</field>
<field name="manu_id_s">Test</field>
<field name="cat">bug</field>
<field name="features">something else</field>
<field name="keywords">bug</field>
<field name="content">bug</field>
</doc></add>
{code}
The fields name, manu, cat, features, keywords and content gets copied to text
and a search for thomasegense matches the text-field with query explanation
{code}
70384.67 = (MATCH) weight(text:thomasegense in 0) [DefaultSimilarity], result
of:
70384.67 = fieldWeight in 0, product of:
1.0 = tf(freq=1.0), with freq of:
1.0 = termFreq=1.0
0.30685282 = idf(docFreq=1, maxDocs=1)
229376.0 = fieldNorm(doc=0)
{code}
If the two last fields keywords and content are removed from the sample
document, the score is reduced by a factor 100 (docBoost^2).
{quote}
(This is a continuation of some of the problems caused by the changes made when
the concept of docBoost was eliminated from the underly IndexWRiter code, and
overlooked due to the lack of testing of docBoosts at the solr level -
SOLR-3885))
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