Hi,
I have recently upgraded to latest Solr4, rewrote the config files and
recreated the index. However now I am having trouble with the MLT
handler and I am not sure whether this is by design or a mistake I am
doing.
If I am using MLT on indexed documents, everything works as expected,
I can set mlt.fl to multiple fields etc. But when I use stream.body
instead of an indexed document, I can only use exactly one field for
mlt.fl, otherwise an error is returned.
To sum up:
WORKS:
.../solr/core1/select?stream.body=consumer%20electronicsqt=mltmlt.fl=title
WORKS:
.../solr/core1/select?stream.body=consumer%20electronicsqt=mltmlt.fl=body
WORKS: .../solr/core1/select?q=id:12345qt=mltmlt.fl=body
DOES NOT WORK:
.../solr/core1/select?stream.body=consumer%20electronicsqt=mltmlt.fl=title,body
Searching on the error I found some references to CachingTokenFilter
on lucene mailing lists, but I do not really understand whether this
problem is caused by my misconfiguration or a bug in MLT.
Error output from Solr example with MLT enabled:
java.io.IOException: Stream closed
at java.io.StringReader.ensureOpen(StringReader.java:56)
at java.io.StringReader.read(StringReader.java:90)
at
org.apache.solr.schema.FieldType$DefaultAnalyzer$1.incrementToken(FieldType.java:417)
at
org.apache.lucene.search.similar.MoreLikeThis.addTermFrequencies(MoreLikeThis.java:891)
at
org.apache.lucene.search.similar.MoreLikeThis.retrieveTerms(MoreLikeThis.java:963)
at
org.apache.lucene.search.similar.MoreLikeThis.like(MoreLikeThis.java:634)
at
org.apache.solr.handler.MoreLikeThisHandler$MoreLikeThisHelper.getMoreLikeThis(MoreLikeThisHandler.java:370)
at
org.apache.solr.handler.MoreLikeThisHandler.handleRequestBody(MoreLikeThisHandler.java:149)
at
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:129)
at org.apache.solr.core.SolrCore.execute(SolrCore.java:1316)
at
org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:353)
at
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:248)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
at
org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at
org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at
org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
at
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
My actual error output:
Stream closed java.io.IOException: Stream closed at
java.io.StringReader.ensureOpen(StringReader.java:56) at
java.io.StringReader.read(StringReader.java:90) at
org.apache.lucene.analysis.CharReader.read(CharReader.java:54) at
org.apache.lucene.analysis.charfilter.MappingCharFilter.read(MappingCharFilter.java:126)
at
org.apache.lucene.analysis.pattern.PatternReplaceCharFilter.read(PatternReplaceCharFilter.java:127)
at
org.apache.lucene.analysis.standard.StandardTokenizerImpl.zzRefill(StandardTokenizerImpl.java:803)
at
org.apache.lucene.analysis.standard.StandardTokenizerImpl.getNextToken(StandardTokenizerImpl.java:1010)
at
org.apache.lucene.analysis.standard.StandardTokenizer.incrementToken(StandardTokenizer.java:168)
at
org.apache.lucene.analysis.util.FilteringTokenFilter.incrementToken(FilteringTokenFilter.java:50)
at
org.apache.lucene.analysis.miscellaneous.WordDelimiterFilter.incrementToken(WordDelimiterFilter.java:224)
at
org.apache.lucene.analysis.core.LowerCaseFilter.incrementToken(LowerCaseFilter.java:54)
at
org.apache.lucene.analysis.compound.CompoundWordTokenFilterBase.incrementToken(CompoundWordTokenFilterBase.java:157)
at
org.apache.lucene.analysis.snowball.SnowballFilter.incrementToken(SnowballFilter.java:77)
at
