[BUG] Cannot run hybrid searches

[kgreen24]

What is the bug?

I'm trying to run a hybrid match + knn search. Knn searches work fine but when I try to run a hybrid query I get the following response:

EXCEPTION: ResponseError: parsing_exception: [parsing_exception] Reason: unknown query [hybrid]

How can one reproduce the bug?

I'm sending in the following request to the search method:

        const query = {
            index: indexName,
            body: {
                query: {
                    hybrid: {
                        queries: [
                            {
                                match: {
                                    embeddedText
                                }
                            },
                            {
                                knn: {
                                    embedding: {
                                        vector,
                                        k
                                    }
                                }
                            }
                        ]
                    }
                }
            }
        };

What is the expected behavior?

I would expect to get a response per this document: https://opensearch.org/docs/latest/search-plugins/hybrid-search/

What is your host/environment?

I'm using 2.13.0 of this package on node 18 running on Windows. I'm connecting to an OpenSearch v 2.5 instance

Do you have any screenshots?

Do you have any additional context?

This is my first day of trying to attempt this, so it's very possible that I just don't understand something. But wanted to ask anyway. I also saw the article was talking about query search pipelines. I have yet to set one of those up or refer to one. Hopefully that's not the issue.

[dblock]

@kgreen24 Let's narrow this down. Does this query work with curl and fails with the client? Is this a local docker instance of OpenSearch or a managed service?

[kgreen24]

@kgreen24 Let's narrow this down. Does this query work with curl and fails with the client? Is this a local docker instance of OpenSearch or a managed service?

Hey, I'm starting to think that this issue is happening because our opensearch is at 2.5 and I don't even think hybrid search was supported until 2.11.

But to answer the question, its a managed service and i can't even get the query to work there.

[dblock]

Hey, I'm starting to think that this issue is happening because our opensearch is at 2.5 and I don't even think hybrid search was supported until 2.11.

That would make sense.

@kgreen24 Try it locally with docker with the latest just to confirm? Should take a few minutes. https://opensearch.org/versions/opensearch-2-18-0.html

[kgreen24]

I confirmed this is working fine in at least v 2.17, I updated our managed service before I saw the previous suggestion about docker testing. Closing. Sorry for the noise.

@dblock thank you for responding.