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  1. Solr
  2. SOLR-556

Highlighting of multi-valued fields returns snippets which span multiple different values



    • Type: Bug
    • Status: Closed
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: 1.3
    • Fix Version/s: 1.3
    • Component/s: highlighter
    • Labels:
    • Environment:

      Tomcat 5.5


      When highlighting multi-valued fields, the highlighter sometimes returns snippets which span multiple values, e.g. with values "foo" and "bar" and search term "ba" the highlighter will create the snippet "foo<em>ba</em>r". Furthermore it sometimes returns smaller snippets than it should, e.g. with value "foobar" and search term "oo" it will create the snippet "<em>oo</em>" regardless of hl.fragsize.

      I have been unable to determine the real cause for this, or indeed what actually goes on at all. To reproduce the problem, I've used the following steps:

      • create an index with multi-valued fields, one document should have at least 3 values for these fields (in my case strings of length between 5 and 15 Japanese characters – as far as I can tell plain old ASCII should produce the same effect though)
      • search for part of a value in such a field with highlighting enabled, the additional parameters I use are hl.fragsize=70, hl.requireFieldMatch=true, hl.mergeContiguous=true (changing the parameters does not seem to have any effect on the result though)
      • highlighted snippets should show effects described above


        1. solr-highlight-multivalued-example.xml
          1.0 kB
          Lars Kotthoff
        2. SOLR-556-highlight-multivalued.patch
          10 kB
          Lars Kotthoff

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              • Assignee:
                klaasm Mike Klaas
                larsko Lars Kotthoff
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