# Why Composite aggregation shows Empty buckets first

**URL:** <https://discuss.elastic.co/t/why-composite-aggregation-shows-empty-buckets-first/354123>\
**Category:** Elasticsearch\
**Tags:** aggregations\
**Created:** [February 26, 2024, 1:21pm UTC](https://discuss.elastic.co/t/why-composite-aggregation-shows-empty-buckets-first/354123 "2024-02-26T13:21:20Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Anand\_Konagala](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/anand_konagala/32/120215_2.png) [@Anand\_Konagala](https://discuss.elastic.co/u/Anand_Konagala)\
**Post date:** [February 26, 2024, 1:21pm UTC](https://discuss.elastic.co/t/why-composite-aggregation-shows-empty-buckets-first/354123/1 "2024-02-26T13:21:20Z")

</div>

Hi,

I have a index with 9 Million documents. I performed Composite aggregation on nested field and I also mentioned doc\_count sorting. Here I lost a lot of perfect buckets.  
Here is my aggregation query with size 2000

```auto
"aggs": {
  "location": {
      "nested": {
          "path": "resume.profile.locations"
      },
      "aggs": {
          "location_s": {
              "composite": {
                  "size": 2000,
                  "sources": [
                      {
                          "state": {
                              "terms": {
                                  "field": "resume.profile.locations.stateCanonical.keyword"
                              }
                          }
                      },
                      {
                          "state_code": {
                              "terms": {
                                  "field": "resume.profile.locations.stateCode.keyword"
                              }
                          }
                      },
                      {
                          "city": {
                              "terms": {
                                  "field": "resume.profile.locations.cityCanonical.keyword"
                              }
                          }
                      },
                      {
                          "postal_code": {
                              "terms": {
                                  "field": "resume.profile.locations.postalCode.keyword"
                              }
                          }
                      },
                      {
                          "country": {
                              "terms": {
                                  "field": "resume.profile.locations.countryCanonical.keyword"
                              }
                          }
                      },
                      {
                          "address_type": {
                              "terms": {
                                  "field": "resume.profile.locations.addressType.keyword"
                              }
                          }
                      },
                      {
                          "confidence_score": {
                              "terms": {
                                  "field": "resume.profile.locations.confidenceScore"
                              }
                          }
                      }
                  ]
              },
              "aggs": {
                  "doc_count_sort": {
                      "bucket_sort": {
                          "sort": [
                              {
                                  "_count": "desc"
                              }
                          ]
                      }
                  }
              }
          }
      }
  }
}

```

I got Empty buckets first like,

```auto
{
            "key": {
              "state": "",
              "state_code": "",
              "city": "",
              "postal_code": "00729",
              "country": "",
              "address_type": "present",
              "confidence_score": 1
            },
            "doc_count": 7
          },
          {
            "key": {
              "state": "",
              "state_code": "",
              "city": "",
              "postal_code": "00841",
              "country": "",
              "address_type": "present",
              "confidence_score": 1
            },
            "doc_count": 7
          },
          {
            "key": {
              "state": "",
              "state_code": "",
              "city": "",
              "postal_code": "00962",
              "country": "",
              "address_type": "present",
              "confidence_score": 1
            },
            "doc_count": 7
          }

```

Actually those postalcode have city and state but, the elasticsearch is not showing..

When I increased the size from 2000 to 20000  
I got buckets like,

```auto
{
            "key": {
              "state": "alabama",
              "state_code": "AL",
              "city": "huntsville",
              "postal_code": "35810",
              "country": "united states of america",
              "address_type": "Present",
              "confidence_score": 1
            },
            "doc_count": 3107
          },
          {
            "key": {
              "state": "alabama",
              "state_code": "AL",
              "city": "montgomery",
              "postal_code": "36116",
              "country": "united states of america",
              "address_type": "Present",
              "confidence_score": 1
            },
            "doc_count": 2728
          },
          {
            "key": {
              "state": "alabama",
              "state_code": "AL",
              "city": "montgomery",
              "postal_code": "36117",
              "country": "united states of america",
              "address_type": "Present",
              "confidence_score": 1
            },
            "doc_count": 2101
          }

```

Can anybody tell me what is the issue here. How can I get complete data buckets with less size without changing the search query because I need to perform on whole data.

Thank you,

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 25, 2024, 1:22pm UTC](https://discuss.elastic.co/t/why-composite-aggregation-shows-empty-buckets-first/354123/2 "2024-03-25T13:22:14Z")

</div>

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