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  1. Solr
  2. SOLR-12323

Missing explain information

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Duplicate
    • Affects Version/s: 7.3
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None

      Description

      We have a problem in Solr 7.3 with the explain field when the edismax query parser is used with the boost parameter.

      To reproduce the issue I created a collection "mycollection" with the default configset and indexed the following csv data:

      title_txt,rating_i
      mytext,2
      

      When I issue the following query to analyse the computation of the score

      http://localhost:8983/solr/mycollection/select?boost=rating_i&defType=edismax&fl=*,score,[explain]&q=title_txt:mytext

       

      I receive the following response:

      {
        "responseHeader":{
          "status":0,
          "QTime":3,
          "params":{
            "q":"title_txt:mytext",
            "defType":"edismax",
            "fl":"*,score,[explain]",
            "boost":"rating_i"}},
        "response":{"numFound":1,"start":0,"maxScore":0.5753642,"docs":[
            {
              "title_txt":["mytext"],
              "rating_i":2,
              "id":"3a7299dc-9628-403b-935b-0ddf17e74897",
              "_version_":1599803310411350016,
              "score":0.5753642,
              "[explain]":"0.5753642 = product of:\n  1.0 = boost\n  0.5753642 = boost(int(rating_i))\n"}]
        }}
      

      The explain no longer contains all the information of the score. For comparison with Solr 7.2.1 but otherwise the same setup the output looks like this:

      {
        "responseHeader":{
          "status":0,
          "QTime":3,
          "params":{
            "q":"title_txt:mytext",
            "defType":"edismax",
            "fl":"*,score,[explain]",
            "boost":"rating_i"}},
        "response":{"numFound":1,"start":0,"maxScore":0.5753642,"docs":[
            {
              "title_txt":["mytext"],
              "rating_i":2,
              "id":"747b9102-0566-4786-a155-87fac10388cc",
              "_version_":1599803926880714752,
              "score":0.5753642,
              "[explain]":"0.5753642 = boost(title_txt:mytext,int(rating_i)), product of:\n  0.2876821 = weight(title_txt:mytext in 0) [SchemaSimilarity], result of:\n    0.2876821 = score(doc=0,freq=1.0 = termFreq=1.0\n), product of:\n      0.2876821 = idf, computed as log(1 + (docCount - docFreq + 0.5) / (docFreq + 0.5)) from:\n        1.0 = docFreq\n        1.0 = docCount\n      1.0 = tfNorm, computed as (freq * (k1 + 1)) / (freq + k1 * (1 - b + b * fieldLength / avgFieldLength)) from:\n        1.0 = termFreq=1.0\n        1.2 = parameter k1\n        0.75 = parameter b\n        1.0 = avgFieldLength\n        1.0 = fieldLength\n  2.0 = int(rating_i)=2\n"}]
        }}
      

      When the boost parameter gets remove Solr 7.3 also show the calculation again:

      {
        "responseHeader":{
          "status":0,
          "QTime":1,
          "params":{
            "q":"title_txt:mytext",
            "defType":"edismax",
            "fl":"*,score,[explain]"}},
        "response":{"numFound":1,"start":0,"maxScore":0.2876821,"docs":[
            {
              "title_txt":["mytext"],
              "rating_i":2,
              "id":"3a7299dc-9628-403b-935b-0ddf17e74897",
              "_version_":1599803310411350016,
              "score":0.2876821,
              "[explain]":"0.2876821 = weight(title_txt:mytext in 0) [SchemaSimilarity], result of:\n  0.2876821 = score(doc=0,freq=1.0 = termFreq=1.0\n), product of:\n    0.2876821 = idf, computed as log(1 + (docCount - docFreq + 0.5) / (docFreq + 0.5)) from:\n      1.0 = docFreq\n      1.0 = docCount\n    1.0 = tfNorm, computed as (freq * (k1 + 1)) / (freq + k1 * (1 - b + b * fieldLength / avgFieldLength)) from:\n      1.0 = termFreq=1.0\n      1.2 = parameter k1\n      0.75 = parameter b\n      1.0 = avgFieldLength\n      1.0 = fieldLength\n"}]
        }}
      

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              • Assignee:
                Unassigned
                Reporter:
                stefan.langenmaier Stefan Langenmaier
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                • Created:
                  Updated:
                  Resolved: