Combining nested query get illegal_state_exception failed to find nested object under path - elasticsearch

Question

I'm creating a query on Elasticsearch, for find documents through all indices.
I need to combine should, must and nested query on Elasticsearch, i get the right result but i get an error inside the result.
This is the query I'm using
GET _all/_search
{
"query": {
"bool": {
"minimum_should_match": 1,
"should": [
{ "term": { "trimmed_final_url": "https://www.repubblica.it/t.../" } }
],
"must": [
{
"nested": {
"path": "entities",
"query": {
"bool": {
"must": [
{ "term": { "entities.id": "138511" } }
]
}
}
}
},
{
"term": {
"language": { "value": "it" }
}
}
]
}
}
And this is the result
{
"_shards" : {
"total" : 38,
"successful" : 14,
"skipped" : 0,
"failed" : 24,
"failures" : [
{
"shard" : 0,
"index" : ".kibana_1",
"node" : "7twsq85TSK60LkY0UiuWzA",
"reason" : {
"type" : "query_shard_exception",
"reason" : """
failed to create query: {
...
"index_uuid" : "HoHi97QFSaSCp09iSKY1DQ",
"index" : ".reporting-2019.06.02",
"caused_by" : {
"type" : "illegal_state_exception",
"reason" : "[nested] failed to find nested object under path [entities]"
}
}
},
...
"hits" : {
"total" : {
"value" : 50,
"relation" : "eq"
},
"max_score" : 16.90015,
"hits" : [
{
"_index" : "i_201906_v1",
"_type" : "_doc",
"_id" : "MugcbmsBAzi8a0oJt96Q",
"_score" : 16.90015,
"_source" : {
"language" : "it",
"entities" : [
{
"id" : 101580,
},
{
"id" : 156822,
},
...
I didn't write some fields because the code is too long

Answer 1

I am new to StackOverFlow (made this account to answer this question :D) so if this answer is out of line bear with me. I have been dabbling in nested fields in Elasticsearch recently so I have some ideas as to how this error could be appearing.
Have you defined a mapping for your document type? I don't believe Elasticsearch will recognize the field as nested if you do not tell it to do so in the mapping:
PUT INDEX_NAME
{
"mappings": {
"DOC_TYPE": {
"properties": {
"entities": {"type": "nested"}
}
}
}
}
You may have to specify this mapping for each index and document type. Not sure if there is a way to do that all with one request.
I also noticed you have a "should" clause with minimum matches set to 1. I believe this is exactly the same as a "must" clause so I am not sure what purpose this achieves (correct me if I'm wrong). If your mapping is specified, the query should look something like this:
GET /_all/_search
{
"query": {
"bool": {
"must": [
{
"nested": {
"path": "entities",
"query": {
"term": {
"entities.id": {
"value": "138511"
}
}
}
}
},
{
"term": {
"language": {
"value": "it"
}
}
},
{
"term": {
"trimmed_final_url": {
"value": "https://www.repubblica.it/t.../"
}
}
}
]
}
}
}