[SOLR-11159] Facet buckets count missing after passing {refine:true} | SOLR-7542

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Not A Bug
• Component/s: Facet Module
• Assignee: Unassigned
• Reporter: Amrit Sarkar
• Created: 27/Jul/17 15:24
• Updated: 08/Jun/19 15:21
• Resolved: 27/Jul/17 16:13

Description

I was experimenting / analysing the new Refinement feature in JSON Facet Apis introduced in SOLR-7452. Passing refine:true with the facet definition.

I am listing down the test-scenarios along with test-data:

3 sharded collection on 3 nodes
node/shard: bucketVal - count

8987: C - 1
8983: C - 4 D - 1 E - 1 A - 1
8985: E - 2 A - 1 D - 1

Total: BUCKETS
C - 5 E - 3 D - 2 A - 2

It is giving accurate results for COUNT ASC, LIMIT 1 - 4

curl http://localhost:8983/solr/collection1/select -d 'q=*:*&json.facet={cat_s:{type:terms,field:cat_s,sort:"count asc",limit:1,overrequest:0,refine:true}}&wt=json&indent=true'

  "facets":{
    "count":12,
    "cat_s":{
      "buckets":[{
          "val":"A",
          "count":2}]}}}

curl http://localhost:8983/solr/collection1/select -d 'q=*:*&json.facet={cat_s:{type:terms,field:cat_s,sort:"count asc",limit:2,overrequest:0,refine:true}}&wt=json&indent=true'

  "facets":{
    "count":12,
    "cat_s":{
      "buckets":[{
          "val":"A",
          "count":2},
        {
          "val":"D",
          "count":2}]}}}

BUT, COUNT DESC, LIMIT 2 and 3

curl http://localhost:8983/solr/collection1/select -d 'q=*:*&json.facet={cat_s:{type:terms,field:cat_s,sort:"count desc",limit:2,overrequest:0,refine:true}}&wt=json&indent=true'

  "facets":{
    "count":12,
    "cat_s":{
      "buckets":[{
          "val":"C",
          "count":5},
        {
          "val":"A",
          "count":2}]}}}

curl http://localhost:8983/solr/collection1/select -d 'q=*:*&json.facet={cat_s:{type:terms,field:cat_s,sort:"count desc",limit:3,overrequest:0,refine:true}}&wt=json&indent=true'

  "facets":{
    "count":12,
    "cat_s":{
      "buckets":[{
          "val":"C",
          "count":5},
        {
          "val":"A",
          "count":2},
        {
          "val":"D",
          "count":2}]}}}

bucketVal E and its count 3 is not in facet response Pardon me if I am missing some configuration or this behavior is right / justified. Ideally we should see bucketVal E and its count 3.

I am attaching Index DOCS, debugQuery for COUNT DESC, LIMIT 2 and LIMIT 3.

Issue Links

• is related to: SOLR-7452 json facet api returning inconsistent counts in cloud set up