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From "Robert Muir (JIRA)" <>
Subject [jira] [Created] (LUCENE-4798) PostingsHighlighter's formatter sometimes doesnt highlight matched terms
Date Tue, 26 Feb 2013 03:40:13 GMT
Robert Muir created LUCENE-4798:

             Summary: PostingsHighlighter's formatter sometimes doesnt highlight matched terms
                 Key: LUCENE-4798
             Project: Lucene - Core
          Issue Type: Bug
          Components: modules/highlighter
            Reporter: Robert Muir

This can happen if you have a sentence where the query terms match many times in the same

for example if you query on "testing highlighter" but you have

"Testing highlighters is sometimes harder than testing other things."

The issue is that the formatter receives all 3 matches, but in this order:
Testing (first occurrence)
testing (second occurrence)

The formatter expects the matches to be in sorted order by offset (not by term, then offset).
This is how the javadocs say they should be.

But there is currently a bug, a stupid side effect of how the ranking is done. Because of
this, in this example "highlighters" isnt marked up in bold.

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