My request was very simple: q= astronomy^0 And Solr returned the exception. Maybe the zero boost factor is not causing the exception?
1) We indexed n documents with a Schema.xml. 2)Then we changed some field type in the Schema.xml 3)Then we indexed other m documents Maybe this could cause the exception? 2010/9/7 Grant Ingersoll <gsing...@apache.org> > > On Sep 7, 2010, at 7:08 AM, Alessandro Benedetti wrote: > > > Hi all, > > I need to retrieve query-results with a ranking independent from each > > query-result's default lucene score, which means assigning the same score > to > > each query result. > > I tried to use a zero boost factor ( ^0 ) to reset to zero each > > query-result's score. > > This strategy seems to work within the "example" solr instance, but in my > > Solr instance, using a zero boost factor causes a Buffer Exception > > ( > > HTTP Status 500 - null java.lang.IllegalArgumentException at > > java.nio.Buffer.limit(Buffer.java:249) at > > > org.apache.lucene.store.NIOFSDirectory$NIOFSIndexInput.readInternal(NIOFSDirectory.java:123) > > at > > > org.apache.lucene.store.BufferedIndexInput.refill(BufferedIndexInput.java:157) > > at > > > org.apache.lucene.store.BufferedIndexInput.readByte(BufferedIndexInput.java:38) > > at org.apache.lucene.store.IndexInput.readInt(IndexInput.java:70) at > > org.apache.lucene.store.IndexInput.readLong(IndexInput.java:93) at > > org.apache.lucene.index.FieldsReader.doc(FieldsReader.java:210) at > > org.apache.lucene.index.SegmentReader.document(SegmentReader.java:948) at > > > org.apache.lucene.index.DirectoryReader.document(DirectoryReader.java:506) > > at org.apache.lucene.index.IndexReader.document(IndexReader.java:947) > > ) > > Hmm, that stack trace doesn't align w/ the boost factor. What was your > request? I think there might be something else wrong here. > > > Do you know any other technique to reset to some fixed constant value, > all > > the query-result's scores? > > Each query result should obtain the same score. > > Any suggestion? > > > The ConstantScoreQuery or a Filter should do this. You could do something > like: > > &q=*:*&fq=<the real query>, as in &q=*:*&fq=field:foo > > -Grant > > > -------------------------- > Grant Ingersoll > http://lucenerevolution.org Apache Lucene/Solr Conference, Boston Oct 7-8 > > -- -------------------------- Benedetti Alessandro Personal Page: http://tigerbolt.altervista.org "Tyger, tyger burning bright In the forests of the night, What immortal hand or eye Could frame thy fearful symmetry?" William Blake - Songs of Experience -1794 England
