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https://issues.apache.org/jira/browse/LUCENE-4955?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13641709#comment-13641709
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Robert Muir commented on LUCENE-4955:
-------------------------------------
I don't think we should add analysis-common as a test dependency to the
highlighter. I worked pretty hard to clean all this up with e.g. mocktokenizer
so we didnt have dependency hell. It also keeps our tests clean.
> NGramTokenFilter increments positions for each gram
> ---------------------------------------------------
>
> Key: LUCENE-4955
> URL: https://issues.apache.org/jira/browse/LUCENE-4955
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/analysis
> Affects Versions: 4.3
> Reporter: Simon Willnauer
> Fix For: 5.0, 4.4
>
> Attachments: highlighter-test.patch, highlighter-test.patch,
> LUCENE-4955.patch
>
>
> NGramTokenFilter increments positions for each gram rather for the actual
> token which can lead to rather funny problems especially with highlighting.
> if this filter should be used for highlighting is a different story but today
> this seems to be a common practice in many situations to highlight sub-term
> matches.
> I have a test for highlighting that uses ngram failing with a StringIOOB
> since tokens are sorted by position which causes offsets to be mixed up due
> to ngram token filter.
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