The change in the schema shouldn't matter (emphasis on the should). What version of SOLR are you using? I tried this query and it works just fine for me, I'm using 1.4.1
Best Erick On Wed, Sep 8, 2010 at 4:38 AM, Alessandro Benedetti < benedetti.ale...@gmail.com> wrote: > 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 >
