Normally, both "changeling" and "the changeling" work fine. This one
server is misbehaving like this for all multi-term queries.
Yes, it is VERY weird that the term "changeling" does not show up in
the explain.
A server will occasionally "go bad" and stay in that state. In one case,
two servers went bad and both gave the same wrong results.
Here is the dismax config. "groups" means "movies". The title* fields
are stemmed and stopped, the "exact*" fields are not.
<!-- groups and people -->
<requestHandler name="groups_people" class="solr.SearchHandler">
<lst name="defaults">
<str name="defType">dismax</str>
<str name="echoParams">none</str>
<float name="tie">0.01</float>
<str name="qf">
exact^6.0 exact_alt^6.0 exact_base~jw_0.7_1^8.0 exact_alias^8.0
title^3.0 title_alt^3.0 title_base^4.0
</str>
<str name="pf">
exact^9.0 exact_alt^9.0 exact_base^12.0 exact_alias^12.0 title^3.0
title_alt^4.0 title_base^6.0
</str>
<str name="bf">
search_popularity^100.0
</str>
<str name="mm">1</str>
<int name="ps">100</int>
<str name="fl">id,type,movieid,personid,genreid</str>
</lst>
<lst name="appends">
<str name="fq">type:group OR type:person</str>
</lst>
</requestHandler>
wunder
On 4/10/09 12:51 PM, "Grant Ingersoll" <gsing...@apache.org> wrote:
>
> On Apr 10, 2009, at 1:56 PM, Walter Underwood wrote:
>
>> We have a rare, hard-to-reproduce problem with our Solr 1.3 servers,
>> and
>> I would appreciate any ideas.
>>
>> Ocassionally, a server will start returning results with really poor
>> relevance. Single term queries work fine, but multi-term queries are
>> scored based on the most common term (lowest IDF).
>>
>> I don't see anything in the logs when this happens. We have a monitor
>> doing a search for the 100 most popular movies once per minute to
>> catch this, so we know when it was first detected.
>>
>> I'm attaching two explain outputs, one for the query "changeling" and
>> one for "the changeling".
>
>
> I'm not sure what exactly you are asking, so bear with me...
>
> Are you saying that "the changeling" normally returns results just
> fine and then periodically it will "go bad" or are you saying you
> don't understand why "the changeling" scores differently from
> "changeling"? In looking at the explains, it is weird that in the
> "the changeling" case, the term changeling doesn't even show up as a
> term.
>
> Can you share your dismax configuration? That will be easier to parse
> than trying to make sense of the debug query parsing.
>
> -Grant
