I believe it was this one https://issues.apache.org/jira/browse/LUCENE-1824
> The natives have been getting restless since I turned off the highlighter > on our application quite a few months ago. In an attempt to rectify > that I've migrated to Solr 3.1 (found it quite stable so far) in hopes to > use the vector highlighter. So far, I'm not seeing a significant > performance hit in the highlighter. I was spending many seconds > highlighting results in 1.4 (1.3 way considerably faster) ... so big win > there. > > > But ... the fragments often cut off words (preceding non-highlighted > words). > > Title field of "Apache MQ Message Queue Setup Notes (Dev)" is getting > highlighted as "he MQ <em>Message Queue</em> Setup Notes (Dev)" Some seem > to highlight fine ... some not. No common thread that I can see. > > From http://wiki.apache.org/solr/HighlightingParameters > hl.fragsize > > "The size, in characters, of fragments to consider for highlighting. "0" > indicates that the whole field value should be used (no fragmenting). This > parameter accepts per-field overrides." > > I thought that might help the situation but that results in > SEVERE: java.lang.IllegalArgumentException: fragCharSize(0) is too small. > It must be 18 or higher. at > org.apache.lucene.search.vectorhighlight.SimpleFragListBuilder.createField > FragList(SimpleFragListBuilder.java:36) at > org.apache.lucene.search.vectorhighlight.FastVectorHighlighter.getFieldFra > gList(FastVectorHighlighter.java:167) at > org.apache.lucene.search.vectorhighlight.FastVectorHighlighter.getBestFrag > ments(FastVectorHighlighter.java:158) at > org.apache.solr.highlight.DefaultSolrHighlighter.doHighlightingByFastVecto > rHighlighter(DefaultSolrHighlighter.java:506) at > org.apache.solr.highlight.DefaultSolrHighlighter.doHighlighting(DefaultSol > rHighlighter.java:379) ... > > I also set the value to a value larger than the possible size of the field > but I still get a left truncated highlight in many cases. > > > hl.fragListBuilder and hl.fragmentsBuilder sound like they may be relevant > but I haven't been able to locate any documentation on those. > > This is my highlighter set up for the time being. > > <str name="hl">true</str> > <str name="hl.useFastVectorHighlighter">true</str> > <str name="hl.snippets">3</str> > <str name="f.title.hl.fragsize">10000</str> > <str name="hl.fragsize">200</str> > <str name="hl.mergeContiguous">true</str> > <str name="hl.simple.pre"><b></str> > <str name="hl.simple.post"></b></str> > > > Any suggestions? Thanks. > I'm running revision 1021880 in the lusolr 3_1 branch. > > > Trey Hyde > th...@centraldesktop.com > Central Desktop, Inc. > Organize, Share, Collaborate
