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Posted to dev@lucene.apache.org by "Christine Poerschke (JIRA)" <ji...@apache.org> on 2017/01/23 15:11:26 UTC
[jira] [Commented] (SOLR-10018) hl.maxAnalyzedChars should have
consistent default across highlighters
[ https://issues.apache.org/jira/browse/SOLR-10018?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15834713#comment-15834713 ]
Christine Poerschke commented on SOLR-10018:
--------------------------------------------
If the intent is (and it might not be) that the new {{SolrHighlighter.DEFAULT_MAX_CHARS}} (51200) matches the value of existing (lucene) {{Highlighter.DEFAULT_MAX_CHARS_TO_ANALYZE}} (50*1024) then perhaps a test could be added to test for that.
(I learnt about {{hl.maxAnalyzedChars}} as part of the [London Lucene Hackday for Full Fact|https://www.meetup.com/Apache-Lucene-Solr-London-User-Group/events/236356241/] on Friday and so this ticket here today caught my eye and interest. hl.maxAnalyzedChars cropped up in the 'stacked tokens' team, [this|https://github.com/FullFact/lucene-solr/blob/master-fullfact-hackday/FullFact-HackDay.md] is our fork/readme file.)
> hl.maxAnalyzedChars should have consistent default across highlighters
> ----------------------------------------------------------------------
>
> Key: SOLR-10018
> URL: https://issues.apache.org/jira/browse/SOLR-10018
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: highlighter
> Affects Versions: 6.4
> Reporter: David Smiley
> Assignee: David Smiley
> Priority: Minor
> Fix For: 6.5
>
> Attachments: SOLR_10018__default_hl_maxAnalyazedChars.patch
>
>
> I see no reason why hl.maxAnalyzedChars should have different defaults per highlighter implementation. The default is typically 51,200 but for the UnifiedHighlighter and PostingsHighlighter it's 10,000. This could easily lead to an unexpected lack of highlights that you expect to see when trying the UH.
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