Description
Elasticsearch Version
8.5
Installed Plugins
No response
Java Version
bundled
OS Version
Linux 5.15.0-113-generic #123~20.04.1-Ubuntu SUTC 2024 x86_64 x86_64 x86_64 GNU/Linux
Problem Description
I am encountering an issue with the highlighting feature in Elasticsearch when using the exists query syntax. Specifically, I have noticed inconsistent behavior between Elasticsearch versions 8.5 and 8.14. When I include the exists query in the request body, the highlighting results differ between these two versions.
I would like to know if this discrepancy is due to a bug that has been fixed in a later version, and if so, which version addresses this issue. Any guidance on resolving this inconsistency would be greatly appreciated.
Steps to Reproduce
I create same index in both 8.5 and 8.14 like this:
{
"mappings": {
"properties": {
"deleted_at": {
"type": "date"
},
"customized_description": {
"properties": {
"internvl_ft": {
"type": "text",
}
}
}
}
}
}
And my query body like this:
{
"query": {
"bool": {
"must_not": [
{
"match": {
"customized_description.internvl_ft": {
"query": "pig"
}
}
},
{
"exists": {
"field": "deleted_at"
}
}
],
"must": [
{
"match": {
"customized_description.internvl_ft": {
"query": "dog"
}
}
}
]
}
},
"highlight": {
"require_field_match": true,
"fields": {
"customized_description.internvl_ft": {
"number_of_fragments": 0,
"post_tags": [
"\"</b>\""
],
"pre_tags": [
"\"<b __toBeReplaced__>\""
]
}
}
},
"size": 2,
}
with 8.14 version , it worked very well with response like:
"hits": [
{
"_index": "test-index",
"_id": "test_id",
"_score": null,
"_source": {
"customized_description": {
"internvl_ft": "this is a picture about a black dog"
}
},
"highlight": {
"customized_description.internvl_ft": [
"this is a picture about a black \"<b __toBeReplaced__>\"dog\"</b>\""
]
}
}
]
However, with 8.5 , its response does not contain any highlight information,
if I drop the part of query:
{
"exists": {
"field": "deleted_at"
}
}
the 8.5 will response with highlight
Logs (if relevant)
No response