[jira] [Assigned] (SOLR-12901) Make UnifiedHighlighter the default

["David Smiley (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-12901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

David Smiley reassigned SOLR-12901:
-----------------------------------

      Component/s: highlighter
    Fix Version/s:     (was: 8.2)
         Assignee: David Smiley
          Summary: Make UnifiedHighlighter the default  (was: Make UnifiedHighlighter the default in 8.0)

I was a bit hesitant for 8.0.  Since then, the fragmentation centering is better and able to be configured similarly to the original highlighter (albeit no regex option).  I think it's good enough, and besides, no highlighter is going away with this change.

> Make UnifiedHighlighter the default
> -----------------------------------
>
>                 Key: SOLR-12901
>                 URL: https://issues.apache.org/jira/browse/SOLR-12901
>             Project: Solr
>          Issue Type: Improvement
>          Components: highlighter
>            Reporter: David Smiley
>            Assignee: David Smiley
>            Priority: Major
>             Fix For: master (9.0)
>
>
> I think the UnifiedHighlighter should be the default in 8.0.  It's faster and more accurate than alternatives.
> The original highlighter however has some benefits:
> * Different passage/snippet delineation options; somewhat more flexible.  Though no i18n BreakIterator based one.
> * Seems to handle some "special" Queries and/or QueryParsers by default better -- namely SurroundQParser.  Though SOLR-12895 will address this UH issue.
> * Considers boosts in the query when computing a passage score
> * hl.alternateField, hl.maxAlternateFieldLength, hl.highlightAlternate options.  Instead the UH has hl.defaultSummary boolean
> See https://builds.apache.org/job/Solr-reference-guide-master/javadoc/highlighting.html



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