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https://issues.apache.org/jira/browse/SOLR-3981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13483508#comment-13483508
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Hoss Man commented on SOLR-3981:
--------------------------------
bq. that adoc() you are using doesnt work with boosts. (I found this from
another test)
Grr... thanks rmuir, never would have even thought to check that ... easy fix.
bq. Applying the boosts once from all source fields for a given copyField
destination seems a bit strange to me, but since it is old behaviour, I
understand that it cannot be changed.
right ... copyField has always copied the _field_ boosts, the bug here is the
compounded docBoost.
FWIW: we could add a ton more options to copyField to give more fine grained
control over stuff like this as feature improvements if you'd like to file some
Jiras for feature impreovements along those lines -- but personally i think: a)
update processors make more sense for stuff like this; b) people to move away
from doc/field boosts and start doing more with functions on numeric fields
(and ultimately DocValues fields) where you have a lot more control of this
stuff
> 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
>
> Attachments: SOLR-3981.patch, SOLR-3981.patch
>
>
> 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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