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From "Lars Kotthoff (JIRA)" <>
Subject [jira] Updated: (SOLR-556) Highlighting of multi-valued fields returns snippets which span multiple different values
Date Thu, 05 Jun 2008 07:45:45 GMT


Lars Kotthoff updated SOLR-556:

    Attachment:     (was: solr-highlight-multivalued.patch)

> Highlighting of multi-valued fields returns snippets which span multiple different values
> -----------------------------------------------------------------------------------------
>                 Key: SOLR-556
>                 URL:
>             Project: Solr
>          Issue Type: Bug
>          Components: highlighter
>    Affects Versions: 1.3
>         Environment: Tomcat 5.5
>            Reporter: Lars Kotthoff
>            Assignee: Mike Klaas
>            Priority: Minor
>             Fix For: 1.3
>         Attachments: SOLR-556-highlight-multivalued.patch, solr-highlight-multivalued-example.xml
> 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

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