payloads - Inconsistency between the document score and the explain score

[Jean-Claude Dauphin]

Hello,



I have implemented payloads at the index and query levels using  specific
PayloadSimilarity  and  PayloadQparserPlugin classes.

Now I wish to check that the payloads processing is correct and thus I
inserted the following code to check the document scores of a Solr request:



     // Display relevance score and explain for debugging and validation

      Iterator<SolrDocument> dociterator = results.iterator();

      Map<String, String> explainmap = queryResponse.getExplainMap();



        *while* (dociterator.hasNext()) {

          SolrDocument doc = dociterator.next();

          String id = (String) doc.getFirstValue("positionID");

          Float relevance = (Float) doc.getFieldValue("score");

          String explanation = explainmap.get(id);

          *LOGGER*.debug("----positionID [{}]", id);

          *LOGGER*.debug("Score [{}]", relevance);

          *LOGGER*.debug("explain: [{}]", explanation);

        }



Here is an extract from the output:



----positionID [441828]

websearch.engine.solr.SolrEnginePosition (1291) Score [6.0416665]

websearch.engine.solr.SolrEnginePosition (1292) explain: [

0.34901428 = (MATCH) product of:

  0.41881716 = (MATCH) sum of:

    0.08182812 = (MATCH) weight(autocomplete-field:chef de projet in 363),
product of:

      0.35501713 = queryWeight(autocomplete-field:chef de projet), product
of:

        3.4769385 = idf(autocomplete-field:  chef de projet=83)

        0.10210624 = queryNorm

      0.23049062 = (MATCH) fieldWeight(autocomplete-field:chef de projet in
363), product of:

        0.70710677 = (MATCH) btq, product of:

          0.70710677 = tf(phraseFreq=0.5)

          1.0 = scorePayload(...)

        3.4769385 = idf(autocomplete-field:  chef de projet=83)

        0.09375 = fieldNorm(field=autocomplete-field, doc=363)



THE EXPLAIN SCORE SEEMS CORRECT BUT I DON’T UNDERSTAND WHY THE DOCUMENT
SCORE (6.0416665) IS DIFFERENT FROM THE EXPLAIN SCORE (0.34901428)



I would appreciate any explanation on this issue or any ideas on what could
be wrong in the code

Best wishes,

-- 
Jean-Claude Dauphin