Yes, you are right, the boost on these documents are 0. I didn't provide them, though.
I suppose the boost scores come from Nutch (yes, my solr indexes crawled web docs). What could be wrong? again, what exactly is the formula for fieldNorm? On Fri, Jul 12, 2013 at 8:46 PM, Jack Krupansky <j...@basetechnology.com>wrote: > Did you put a boost of 0.0 on the documents, as opposed to the default of > 1.0? > > x * 0.0 = 0.0 > > -- Jack Krupansky > > -----Original Message----- From: Joe Zhang > Sent: Friday, July 12, 2013 10:31 PM > To: solr-user@lucene.apache.org > Subject: zero-valued retrieval scores > > > when I search a keyword (such as "apple"), most of the docs carry 0.0 as > score. Here is an example from explain: > > str name=" > http://www.bloomberg.com/**slideshow/2013-07-12/world-at-**work-india.html<http://www.bloomberg.com/slideshow/2013-07-12/world-at-work-india.html> > "> > 0.0 = (MATCH) fieldWeight(content:appl in 51), product of: > 1.0 = tf(termFreq(content:appl)=1) > 2.096877 = idf(docFreq=5190, maxDocs=15546) > 0.0 = fieldNorm(field=content, doc=51) > Can somebody help me understand why fieldNorm is 0? What exactly is the > formula for computing fieldNorm? > > Thanks! >
