# Unknown key for a START\_OBJECT in \[3\]

**URL:** <https://discuss.elastic.co/t/unknown-key-for-a-start-object-in-3/314777>\
**Category:** Elasticsearch\
**Created:** [September 20, 2022, 1:20pm UTC](https://discuss.elastic.co/t/unknown-key-for-a-start-object-in-3/314777 "2022-09-20T13:20:01Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![Rain\_Water](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rain_water/32/98764_2.png) [@Rain\_Water](https://discuss.elastic.co/u/Rain_Water)\
**Post date:** [September 20, 2022, 1:20pm UTC](https://discuss.elastic.co/t/unknown-key-for-a-start-object-in-3/314777/1 "2022-09-20T13:20:01Z")

</div>

Hi all,  
im getting this error on aggs query and i want to do multiple aggregation can you pls help here.

```auto
{
  "error" : {
    "root_cause" : [
      {
        "type" : "parsing_exception",
        "reason" : "Unknown key for a START_OBJECT in [3].",
        "line" : 35,
        "col" : 8
      }
    ],
    "type" : "parsing_exception",
    "reason" : "Unknown key for a START_OBJECT in [3].",
    "line" : 35,
    "col" : 8
  },
  "status" : 400
}

```

When making this query on elasticsearch. pls help me correct the query i want do more multiple aggregation query on index.

```auto
GET /_search
{
  "query": {
    "bool": {
      "filter": [
        {
          "range": {
            "@timestamp": {
              "gte": 1663666935141,
              "lte": 1663668735142,
              "format": "epoch_millis"
            }
          }
        },
        {
          "query_string": {
            "analyze_wildcard": true,
            "query": "service.name:*kmw*"
          }
        }
      ]
    }
  },
  "aggs": {
    "2": {
      "terms": {
        "field": "labels.client_id",
        "size": 10000,
        "order": {
          "_key": "desc"
        },
        "min_doc_count": 1
      }
    }
  },
  "3": {
      "sum": {
        "field": "labels.row_count",
        "size": 10000,
        "order": {
          "_key": "desc"
        },
        "min_doc_count": 1
      }
    }
}

```

Would someone guide me correcting this error, im not able to do multiple aggregation query on index.  
Thanks.

---

<div class="post-metadata">

**Author:** ![Yang\_Wang](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yang_wang/32/48857_2.png) [@Yang\_Wang](https://discuss.elastic.co/u/Yang_Wang)\
**Post date:** [September 21, 2022, 1:37am UTC](https://discuss.elastic.co/t/unknown-key-for-a-start-object-in-3/314777/2 "2022-09-21T01:37:53Z")

</div>

The key `"3"` and its value should be inside of the `"aggs"` field, e.g. something like:

```auto
{
...
  "aggs": {
    "2": { ... },
    "3": { ... }
  }
...
}

```

---

<div class="post-metadata">

**Author:** ![Rain\_Water](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rain_water/32/98764_2.png) [@Rain\_Water](https://discuss.elastic.co/u/Rain_Water)\
**Post date:** [September 21, 2022, 3:46am UTC](https://discuss.elastic.co/t/unknown-key-for-a-start-object-in-3/314777/3 "2022-09-21T03:46:40Z")

</div>

When i do that i get.. Duplicate key "aggs" syntax errror so the query wont run

---

<div class="post-metadata">

**Author:** ![Rain\_Water](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rain_water/32/98764_2.png) [@Rain\_Water](https://discuss.elastic.co/u/Rain_Water)\
**Post date:** [September 21, 2022, 6:31am UTC](https://discuss.elastic.co/t/unknown-key-for-a-start-object-in-3/314777/4 "2022-09-21T06:31:24Z")

</div>

@yang_wang thanks for your time and help. the issue is resolved. 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:** [October 19, 2022, 6:31am UTC](https://discuss.elastic.co/t/unknown-key-for-a-start-object-in-3/314777/5 "2022-10-19T06:31:30Z")

</div>

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