Highlighting nested documents with inner_hits and fvh returns no snippets #87185
Description
Elasticsearch Version
7.14.1
also tested with 8.2.0 with the same results
Installed Plugins
none
Java Version
bundled
OS Version
Darwin scott.bessler 21.4.0 Darwin Kernel Version 21.4.0: Fri Mar 18 00:46:32 PDT 2022; root:xnu-8020.101.4~15/RELEASE_ARM64_T6000 arm64
Problem Description
When attempting to highlight nested documents using inner_hits, we receive no snippets.
Steps to Reproduce
Create the index
PUT /nestedfvh
{
"mappings": {
"dynamic": "strict",
"properties": {
"kvs": {
"type": "nested",
"properties": {
"key": {
"type": "keyword"
},
"value": {
"type": "text",
"fields": {
"exact": {
"type": "text",
"term_vector": "with_positions_offsets"
}
}
}
}
}
}
},
"settings": {
"number_of_shards": 1,
"number_of_replicas": 0
}
}
add a document
PUT /nestedfvh/_doc/foo
{"kvs": [{"key":"a", "value":"the quick brown fox"}]}
query
POST /nestedfvh/_search
{
"query": {
"nested": {
"path": "kvs",
"inner_hits": {
"_source": false,
"docvalue_fields": [
"kvs.key"
],
"highlight": {
"fields": {
"kvs.value.exact": { "type": "fvh" }
}
}
},
"query": {
"bool": {
"filter": {
"term": {
"kvs.key": "a"
}
},
"should": {
"match_phrase": {
"kvs.value.exact": "quick brown"
}
},
"minimum_should_match": 1
}
}
}
}
}
Response is missing snippets for highights:
{
"statusCode": 200,
"body": {
"took": 13,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 1,
"relation": "eq"
},
"max_score": 0.5753642,
"hits": [
{
"_index": "nestedfvh",
"_type": "_doc",
"_id": "foo",
"_score": 0.5753642,
"_source": {
"kvs": [
{
"key": "a",
"value": "the quick brown fox"
}
]
},
"inner_hits": {
"kvs": {
"hits": {
"total": {
"value": 1,
"relation": "eq"
},
"max_score": 0.5753642,
"hits": [
{
"_index": "nestedfvh",
"_type": "_doc",
"_id": "foo",
"_nested": {
"field": "kvs",
"offset": 0
},
"_score": 0.5753642,
"fields": {
"kvs.key": [
"a"
]
}
}
]
}
}
}
}
]
}
},
"headers": {
"x-elastic-product": "Elasticsearch",
"warning": "299 Elasticsearch-7.14.1-66b55ebfa59c92c15db3f69a335d500018b3331e \"Elasticsearch built-in security features are not enabled. Without authentication, your cluster could be accessible to anyone. See https://www.elastic.co/guide/en/elasticsearch/reference/7.14/security-minimal-setup.html to enable security.\"",
"content-type": "application/json; charset=UTF-8",
"content-length": "530"
},
"request": {
"uri": {
"protocol": "http:",
"slashes": true,
"auth": null,
"host": "localhost:9201",
"port": "9201",
"hostname": "localhost",
"hash": null,
"search": null,
"query": null,
"pathname": "/nestedfvh/_search",
"path": "/nestedfvh/_search",
"href": "http://localhost:9201/nestedfvh/_search"
},
"method": "POST",
"headers": {
"Accept": "application/json",
"Content-Type": "application/json",
"User-Agent": "elasticdeveloper",
"content-length": 577
}
},
"message": "OK",
"completed": true,
"environment": {
"_textTokens": [],
"_version": {
"_major": "7",
"_minor": "14",
"_patch": "1"
},
"_host": "http://localhost:9201",
"_name": "dev7"
}
}
If you remove "type": "fvh" it returns an accurate (other than splitting the phrase, :() snippet:
"highlight": {
"kvs.value.exact": [
"the <em>quick</em> <em>brown</em> fox"
]
}
Logs (if relevant)
No response