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https://issues.apache.org/jira/browse/LUCENE-5229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13773108#comment-13773108
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Robert Muir commented on LUCENE-5229:
-------------------------------------
{quote}
I wasn't confused by the fact that I received NaN, only pointed out that when
you use Expression, the result is not in the 'score' field, but the 'field'
field.
{quote}
You invoked IndexSearcher.search(query, filter, n, *Sort*) and you were
surprised that the result of the sort goes there?
I think this kinda stuff only furthers to reinforce my argument that this stuff
is way too specialized and complicated.
> remove Collector specializations
> --------------------------------
>
> Key: LUCENE-5229
> URL: https://issues.apache.org/jira/browse/LUCENE-5229
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Robert Muir
> Assignee: Robert Muir
>
> There are too many collector specializations (i think 16 or 18?) and too many
> crazy defaults like returning NaN scores to the user by default in
> indexsearcher.
> this confuses hotspot (I will ignore any benchmarks posted here where only
> one type of sort is running thru the JVM, thats unrealistic), and confuses
> users with stuff like NaN scores coming back by default.
> I have two concerete suggestions:
> * nuke doMaxScores. its implicit from doScores. This is just over the top.
> This should also halve the collectors.
> * change doScores to true by default in indexsearcher. since shai was
> confused by the NaNs by default, and he added this stuff to lucene, that says
> *everything* about how wrong this default is. Someone who *does* understand
> what it does can simply pass false.
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