Issue with boost settings

[rohitletsbuzz]

Hi,
I think this is an issue. I posted in the user group but got no response.
When the following query is created on an Index with lot of fields...

"bool" : {
    "must" : {
      "bool" : {
        "should" : [ {
          "bool" : {
            "must" : {
              "query_string" : {
                "query" : "\"microsoft\"",
                "fields" : [ "nameTokens" ],
                "analyzer" : "analyzerWithoutStop"
              }
            },
            "boost" : 5.0
          }
        }, {
          "bool" : {
            "should" : {
              "query_string" : {
                "query" : "\"insideview.com\"",
                "fields" : [ "companyDomain" ],
                "analyzer" : "analyzerWithoutStop"
              }
            },
            "boost" : 10.0
          }
        } ]
      }
    }
  }
}

On the "nameTokens" filed the boost parameter keeps increasing with the number of queries. Thats is

1. When the query is fired for the first time. The explanation i got for the two results, one matched the "nameToken" clause and the other matched the "companyDomain" clause:

1st result

3.1991732 = (MATCH) product of:
  6.3983464 = (MATCH) sum of:
    6.3983464 = (MATCH) weight(companyDomain:insideview.com^10.0 in 223), product of:
      0.93694496 = queryWeight(companyDomain:insideview.com^10.0), product of:
        10.0 = boost
        6.8289456 = idf(docFreq=2, maxDocs=1020)
        0.013720199 = queryNorm
      6.8289456 = (MATCH) fieldWeight(companyDomain:insideview.com in 223), product of:
        1.0 = tf(termFreq(companyDomain:insideview.com)=1)
        6.8289456 = idf(docFreq=2, maxDocs=1020)
        1.0 = fieldNorm(field=companyDomain, doc=223)
  0.5 = coord(1/2)

2nd result

0.89017844 = (MATCH) product of:
  1.7803569 = (MATCH) sum of:
    1.7803569 = (MATCH) weight(nameTokens:microsoft^5.0 in 209), product of:
      0.3494771 = queryWeight(nameTokens:microsoft^5.0), product of:
        5.0 = boost
        5.0943446 = idf(docFreq=16, maxDocs=1020)
        0.013720199 = queryNorm
      5.0943446 = (MATCH) fieldWeight(nameTokens:microsoft in 209), product of:
        1.0 = tf(termFreq(nameTokens:microsoft)=1)
        5.0943446 = idf(docFreq=16, maxDocs=1020)
        1.0 = fieldNorm(field=nameTokens, doc=209)
  0.5 = coord(1/2)

2nd time the same search result is fired:

2.5471714 = (MATCH) product of:
  5.0943427 = (MATCH) sum of:
    5.0943427 = (MATCH) weight(nameTokens:microsoft^15625.0 in 209), product of:
      0.99999964 = queryWeight(nameTokens:microsoft^15625.0), product of:
        15625.0 = boost
        5.0943446 = idf(docFreq=16, maxDocs=1020)
        1.2562947E-5 = queryNorm
      5.0943446 = (MATCH) fieldWeight(nameTokens:microsoft in 209), product of:
        1.0 = tf(termFreq(nameTokens:microsoft)=1)
        5.0943446 = idf(docFreq=16, maxDocs=1020)
        1.0 = fieldNorm(field=nameTokens, doc=209)
  0.5 = coord(1/2)

2nd result

 0.0029293338 = (MATCH) product of:
  0.0058586677 = (MATCH) sum of:
    0.0058586677 = (MATCH) weight(companyDomain:insideview.com^10.0 in 223), product of:
      8.5791684E-4 = queryWeight(companyDomain:insideview.com^10.0), product of:
        10.0 = boost
        6.8289456 = idf(docFreq=2, maxDocs=1020)
        1.2562947E-5 = queryNorm
      6.8289456 = (MATCH) fieldWeight(companyDomain:insideview.com in 223), product of:
        1.0 = tf(termFreq(companyDomain:insideview.com)=1)
        6.8289456 = idf(docFreq=2, maxDocs=1020)
        1.0 = fieldNorm(field=companyDomain, doc=223)
  0.5 = coord(1/2)

If you look at the boost parameter in the query explanation, it is increasing with every query of one clause.