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https://issues.apache.org/jira/browse/LUCENE-6471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16082046#comment-16082046
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Jim Richards commented on LUCENE-6471:
--------------------------------------

[~dsmiley],

I'm using [hibernate-search-orm|http://hibernate.org/search/], which is using 
5.5.4 of the Lucene libraries and UnifiedHighlighter is from 6.x. I could 
probably do some magic in {{pom.xml}} to exclude 5.5.4 but my basic test had 
too many incompatibilities.

Jim.

> Highlighter mergeContiguousFragments shouldn't merge 0-score fragments
> ----------------------------------------------------------------------
>
>                 Key: LUCENE-6471
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6471
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: modules/highlighter
>            Reporter: David Smiley
>            Priority: Minor
>
> Highlighter.mergeContiguousFragments merges adjacent fragments it is given.  
> But it is given a list of fragments that do not necessarily have embedded 
> highlights (e.g. have a score of 0), and so it could grow a fragment 
> needlessly.  I never figured out why this old highlighter keeps around such 
> fragments instead of eagerly tossing them when the fragment completes, which 
> is what I think it should do.  That would address this problem and might make 
> things faster.  I'm not sure if any highlighter user wants the non-scoring 
> fragments though.



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