Custom Query Rescorer

[dmalipie]

Description

Java API client version
8.5.3+

Java version
17

Elasticsearch Version
7.17.* - 8.*

Problem description

We have install a rescore plugin just like this one .

To use it we send a request like this:

[POST] /_search

{
    "query": {
         "match_all": {}
    },
    "rescore": {
        "example": {
            "factor": 2
        }
    }
} 

Unfortunately the Rescore model (co.elastic.clients.elasticsearch.core.search.Rescore) allows only the use of a RescoreQuery model that will be serialized as:

{
    "rescore": {
        "query": {
            "rescore_query": {
                "match_phrase": {
                    "message": {
                        "query": "the quick brown",
                        "slop": 2
                    }
                }
            }
        }
    }
} 

Is it possible to add a new feature to define a Rescore model with a custom model to allow us to use a rescorer plugin ?

[edovac]

Can we have at least a triage of this issue?

[bajibalu]

Hi, I am also running into this issue now after upgrading from Elasticsearch 7 to 8. Can we please have this issue triaged? I am happy to contribute as well.