Hello all
I would like to handle german accents (Umlaute) by replacing the accented char
with its two-letter substitute (e.g ä => ae). For this reason I use the
char-filter solr.MappingCharFilterFactory configured with a mapping file
containing entries like “ä” => “ae”. I also want to use the
solr.DictionaryCompoundWordTokenFilterFactory to find words which are part of
compound words (e.g. revision in totalrevision). And finally I want to use Solr
highlighting. But there seems to be a problem if I combine the char filter and
the compound word filter in combination with highlighting (an
org.apache.lucene.search.highlight.InvalidTokenOffsetsException is raised).
Here are the details:
types:
--------
<fieldType name="textAnalyzedFailed" class="solr.TextField"
positionIncrementGap="100">
<analyzer>
<charFilter class="solr.MappingCharFilterFactory"
mapping="mapping.txt"/>
<tokenizer class="solr.WhitespaceTokenizerFactory"/>
<filter class="solr.DictionaryCompoundWordTokenFilterFactory"
dictionary=“words.txt”/>
</analyzer>
</fieldType>
schema:
-----------
<fields>
<field name="id" type="string" indexed="true"
stored="true" required="true" />
<field name="title" type="textAnalyzedFailed" indexed="true"
stored="true"/>
</fields>
document:
--------------
<doc>
<field name="id">1</field>
<field name="title">banküberfall</field>
</doc>
mapping.txt:
-----------------
"ü" => "ue"
words.txt:
--------------
fall
The resulting error when search with:
http://localhost:8080/solr/select/?q=banküberfall&hl=true&hl.fl=title
Nov 4, 2011 4:29:12 PM org.apache.solr.core.SolrCore execute
INFO: [] webapp=/solr path=/select/
params={q=bank?berfall&hl.fl=title_hl&hl=true} hits=1 status=0 QTime=13
Nov 4, 2011 4:29:16 PM org.apache.solr.common.SolrException log
SEVERE: org.apache.solr.common.SolrException:
org.apache.lucene.search.highlight.InvalidTokenOffsetsException: Token fall
exceeds length of provided text sized 12
at
org.apache.solr.highlight.DefaultSolrHighlighter.doHighlightingByHighlighter(DefaultSolrHighlighter.java:469)
at
org.apache.solr.highlight.DefaultSolrHighlighter.doHighlighting(DefaultSolrHighlighter.java:378)
at
org.apache.solr.handler.component.HighlightComponent.process(HighlightComponent.java:116)
at
org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:194)
at
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:129)
at org.apache.solr.core.SolrCore.execute(SolrCore.java:1360)
at
org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:356)
at
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:252)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:851)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:278)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)
Caused by: org.apache.lucene.search.highlight.InvalidTokenOffsetsException:
Token fall exceeds length of provided text sized 12
at
org.apache.lucene.search.highlight.Highlighter.getBestTextFragments(Highlighter.java:228)
at
org.apache.solr.highlight.DefaultSolrHighlighter.doHighlightingByHighlighter(DefaultSolrHighlighter.java:462)
... 23 more
Thanks a lot for any suggestions and best regards,
Edwin
