Negative scores and duplicated results using Hybrid search

OpenSearch
5

I think your issue is that you’re missing a normalization-processor search pipeline. Try adding a temporary search pipeline to your query and see if that resolves the issue:

{
  "query": {
    "hybrid": {
      "queries": [
        {
          "match": {
            "name": {
              "query": "Hi world"
            }
          }
        },
        {
          "knn": {
            "imageVector": {
              "vector": [1,1,1,1,1],
              "k": 3
            }
          }
        }
      ]
    }
  },
  "search_pipeline" : {
    "phase_results_processors": [
      {
        "normalization-processor": {
          "normalization": {
            "technique": "min_max"
          }
          , "combination": {
              "technique": "arithmetic_mean"
            , "parameters": {
              "weights": [0.3, 0.7]
            }
          }
          , "ignore_failure": false
        }
      }
    ]
  }
}