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https://issues.apache.org/jira/browse/SOLR-5929?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13950802#comment-13950802
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Shawn Heisey commented on SOLR-5929:
------------------------------------
Problems should be raised on the mailing list first. We try to confirm bugs
before opening issues in JIRA. The Solr "discussion" page mentions this.
http://lucene.apache.org/solr/discussion.html
SolrJ just returns results in the order that Solr delivers them. It does not
do any re-ordering.
The first response (formatted json) doesn't list a sort parameter. The second
one (toString from SolrJ) does list a sort parameter. The requests are
different, which is why the results are different.
The source of your confusion here appears to be the document scores. Your
first search does not have a sort field. It uses the score. The second has a
sort field, so the score is ignored, and the sort parameter is the only thing
that is used. The debug will still calculate the score, even though it doesn't
matter.
> Solrj QueryResponse results not presented in proper score order
> ---------------------------------------------------------------
>
> Key: SOLR-5929
> URL: https://issues.apache.org/jira/browse/SOLR-5929
> Project: Solr
> Issue Type: Bug
> Components: clients - java
> Affects Versions: 4.6.1
> Environment: Windows 7, Java 7
> Reporter: Chris Pilsworth
>
> It would appear that the results collection is sorting on the score as a
> string where there is an exponent.
> When searching for a term that returns two documents, one with a
> significantly smaller score than the other the results are returned
> *correctly* from solr directly.
> {code:json}
> {
> responseHeader: {
> status: 0,
> QTime: 69,
> params: {
> q: "sausages",
> indent: "true",
> fl: "id, inv_text_summary, score",
> wt: "json",
> debugQuery: "true"
> }
> },
> response: {
> numFound: 2,
> start: 0,
> maxScore: 0.0012368863,
> docs: [
> {
> inv_text_summary: "Contrary to popular belief, Lorem sausages
> sausages sausages sausagesIpsum is not simply random text. It has roots in a
> piece of classical Latin literature from 45 BC, making it over 2000 years
> old. Richard McClintock, a Latin professor at Hampden-Sydney College in
> Virginia, looked up one of the ...",
> id:
> "/content/site-qa/capital/en_gb/home/test_pages/test_page_2/multiterm2",
> score: 0.0012368863
> },
> {
> inv_text_summary: "Contrary to sausages belief, Lorem Ipsum
> is not simply random text. It has roots in a piece of classical Latin
> literature from 45 BC, making it over 2000 years old. Richard McClintock, a
> Latin professor at Hampden-Sydney College in Virginia, looked up one of the
> more obscure Latin words, consecte...",
> id:
> "/content/site-qa/capital/en_gb/home/test_pages/test_page_2/multiterm1",
> score: 0.0006184431
> }
> ]
> },
> debug: {
> rawquerystring: "sausages",
> querystring: "sausages",
> parsedquery: "(+DisjunctionMaxQuery((inv_path:sausages |
> inv_h1:sausages^8.0 | inv_text_summary:sausages^2.0 | inv_title:sausages^18.0
> | inv_h2:sausages^6.0 | inv_h3:sausages^4.0 | inv_text:sausages)~1.0) () ()
> () () () () ())/no_coord",
> parsedquery_toString: "+(inv_path:sausages | inv_h1:sausages^8.0 |
> inv_text_summary:sausages^2.0 | inv_title:sausages^18.0 | inv_h2:sausages^6.0
> | inv_h3:sausages^4.0 | inv_text:sausages)~1.0 () () () () () () ()",
> explain: {
>
> /content/site-qa/capital/en_gb/home/test_pages/test_page_2/multiterm2: "
> 0.0012368863 = (MATCH) sum of: 0.0012368863 = (MATCH) max plus 1.0 times
> others of: 0.0012368863 = (MATCH) weight(inv_text:sausages in 0)
> [DefaultSimilarity], result of: 0.0012368863 = score(doc=0,freq=4.0 =
> termFreq=4.0 ), product of: 0.016643414 = queryWeight, product of: 0.5945349
> = idf(docFreq=2, maxDocs=2) 0.027994009 = queryNorm 0.07431686 = fieldWeight
> in 0, product of: 2.0 = tf(freq=4.0), with freq of: 4.0 = termFreq=4.0
> 0.5945349 = idf(docFreq=2, maxDocs=2) 0.0625 = fieldNorm(doc=0) ",
>
> /content/site-qa/capital/en_gb/home/test_pages/test_page_2/multiterm1: "
> 6.184431E-4 = (MATCH) sum of: 6.184431E-4 = (MATCH) max plus 1.0 times others
> of: 6.184431E-4 = (MATCH) weight(inv_text:sausages in 0) [DefaultSimilarity],
> result of: 6.184431E-4 = score(doc=0,freq=1.0 = termFreq=1.0 ), product of:
> 0.016643414 = queryWeight, product of: 0.5945349 = idf(docFreq=2, maxDocs=2)
> 0.027994009 = queryNorm 0.03715843 = fieldWeight in 0, product of: 1.0 =
> tf(freq=1.0), with freq of: 1.0 = termFreq=1.0 0.5945349 = idf(docFreq=2,
> maxDocs=2) 0.0625 = fieldNorm(doc=0) "
> },
> QParser: "ExtendedDismaxQParser",
> altquerystring: null,
> boost_queries: null,
> parsed_boost_queries: [
>
> ],
> boostfuncs: null,
> timing: {
> time: 69,
> prepare: {
> time: 14,
> query: {
> time: 14
> },
> facet: {
> time: 0
> },
> mlt: {
> time: 0
> },
> highlight: {
> time: 0
> },
> stats: {
> time: 0
> },
> debug: {
> time: 0
> }
> },
> process: {
> time: 55,
> query: {
> time: 0
> },
> facet: {
> time: 0
> },
> mlt: {
> time: 0
> },
> highlight: {
> time: 0
> },
> stats: {
> time: 0
> },
> debug: {
> time: 55
> }
> }
> }
> }
> }
> {code}
> However, when read through the solrj client, the document with the lower
> score is presented first. This could be as the lower score (0.0006184431) is
> expressed as 6.184431E-4 so if a string sort was applied, could explain the
> order.
> The QueryResponse.toString looks like this.
> {code}
> [responseHeader=[status=0,QTime=2156,params=[q=sausages,hl.useFastVectorHighlighter=true,facet.field=[inv_siteContentType,
>
> inv_siteCategory],qt=/selectmin,hl=true,start=0,sort=inv_desktopPageTitleSort
> asc,id
> asc,rows=5,facet=true,wt=javabin,version=2,debugQuery=true]],response=[numFound=2,start=0,maxScore=0.0012368863,docs=[SolrDocument[inv_text_summary=Contrary
> to sausages belief, Lorem Ipsum is not simply random text. It has roots in a
> piece of classical Latin literature from 45 BC, making it over 2000 years
> old. Richard McClintock, a Latin professor at Hampden-Sydney College in
> Virginia, looked up one of the more obscure Latin words, consecte...,
> inv_title=[multiterm1 - Investec Specialist Bank],
> inv_customContentTypes=[#1:COMMON#2:#3:#4:#5:[]#6:#7:[]#8:[]],
> id=/content/site-qa/capital/en_gb/home/test_pages/test_page_2/multiterm1,
> inv_created=Thu Mar 27 12:54:34 CET 2014, inv_contentProcessed=Thu Mar 27
> 12:59:04 CET 2014, inv_desktopPageTitle=multiterm1,
> inv_mobilePageTitle=multiterm1, inv_lastModified=Thu Mar 27 12:57:48 CET
> 2014, score=6.184431E-4], SolrDocument[inv_text_summary=Contrary to popular
> belief, Lorem sausages sausages sausages sausagesIpsum is not simply random
> text. It has roots in a piece of classical Latin literature from 45 BC,
> making it over 2000 years old. Richard McClintock, a Latin professor at
> Hampden-Sydney College in Virginia, looked up one of the ...,
> inv_title=[multiterm2 - Investec Specialist Bank],
> inv_customContentTypes=[#1:COMMON#2:#3:#4:#5:[]#6:#7:[]#8:[]],
> id=/content/site-qa/capital/en_gb/home/test_pages/test_page_2/multiterm2,
> inv_created=Thu Mar 27 12:54:42 CET 2014, inv_contentProcessed=Thu Mar 27
> 13:03:31 CET 2014, inv_desktopPageTitle=multiterm2,
> inv_mobilePageTitle=multiterm2, inv_lastModified=Thu Mar 27 13:03:27 CET
> 2014,
> score=0.0012368863]]],facet_counts=[facet_queries=[],facet_fields=[inv_siteContentType=[NONE=2],inv_siteCategory=[NONE=2]],facet_dates=[],facet_ranges=[]],highlighting=[/content/site-qa/capital/en_gb/home/test_pages/test_page_2/multiterm1=[inv_text=[Contrary
> to <b>sausages</b> belief, Lorem Ipsum is not simply random text. It has
> roots in a piece of
> classical]],/content/site-qa/capital/en_gb/home/test_pages/test_page_2/multiterm2=[inv_text=[Contrary
> to popular belief, Lorem <b>sausages</b> <b>sausages</b> <b>sausages</b>
> <b>sausages</b>Ipsum is not simply random text.
> It]]],debug=[rawquerystring=sausages,querystring=sausages,parsedquery=(+DisjunctionMaxQuery((inv_path:sausages
> | inv_h1:sausages^8.0 | inv_text_summary:sausages^2.0 |
> inv_title:sausages^18.0 | inv_h2:sausages^6.0 | inv_h3:sausages^4.0 |
> inv_text:sausages)~1.0) () () () () () ()
> ())/no_coord,parsedquery_toString=+(inv_path:sausages | inv_h1:sausages^8.0 |
> inv_text_summary:sausages^2.0 | inv_title:sausages^18.0 | inv_h2:sausages^6.0
> | inv_h3:sausages^4.0 | inv_text:sausages)~1.0 () () () () () () (),explain=
> [/content/site-qa/capital/en_gb/home/test_pages/test_page_2/multiterm1=
> 6.184431E-4 = (MATCH) sum of:
> 6.184431E-4 = (MATCH) max plus 1.0 times others of:
> 6.184431E-4 = (MATCH) weight(inv_text:sausages in 0) [DefaultSimilarity],
> result of:
> 6.184431E-4 = score(doc=0,freq=1.0 = termFreq=1.0
> ), product of:
> 0.016643414 = queryWeight, product of:
> 0.5945349 = idf(docFreq=2, maxDocs=2)
> 0.027994009 = queryNorm
> 0.03715843 = fieldWeight in 0, product of:
> 1.0 = tf(freq=1.0), with freq of:
> 1.0 = termFreq=1.0
> 0.5945349 = idf(docFreq=2, maxDocs=2)
> 0.0625 = fieldNorm(doc=0)
> ,/content/site-qa/capital/en_gb/home/test_pages/test_page_2/multiterm2=
> 0.0012368863 = (MATCH) sum of:
> 0.0012368863 = (MATCH) max plus 1.0 times others of:
> 0.0012368863 = (MATCH) weight(inv_text:sausages in 0)
> [DefaultSimilarity], result of:
> 0.0012368863 = score(doc=0,freq=4.0 = termFreq=4.0
> ), product of:
> 0.016643414 = queryWeight, product of:
> 0.5945349 = idf(docFreq=2, maxDocs=2)
> 0.027994009 = queryNorm
> 0.07431686 = fieldWeight in 0, product of:
> 2.0 = tf(freq=4.0), with freq of:
> 4.0 = termFreq=4.0
> 0.5945349 = idf(docFreq=2, maxDocs=2)
> 0.0625 = fieldNorm(doc=0)
> ]
> {code}
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