Failed to execute tutorial of exact nearest neighbor search on AWS ElasticSearch

[ymirchev]

I tried tutorial described in https://opendistro.github.io/for-elasticsearch-docs/docs/knn/knn-score-script/
on AWS ElasticSearch but got error.

Here are the steps:

I created index:
PUT my-knn-index-1 { "mappings": { "properties": { "my_vector1": { "type": "knn_vector", "dimension": 2 }, "my_vector2": { "type": "knn_vector", "dimension": 4 } } } }

I inserted data:
POST _bulk { "index": { "_index": "my-knn-index-1", "_id": "1" } } { "my_vector1": [1.5, 2.5], "price": 12.2 } { "index": { "_index": "my-knn-index-1", "_id": "2" } } { "my_vector1": [2.5, 3.5], "price": 7.1 } { "index": { "_index": "my-knn-index-1", "_id": "3" } } { "my_vector1": [3.5, 4.5], "price": 12.9 } { "index": { "_index": "my-knn-index-1", "_id": "4" } } { "my_vector1": [5.5, 6.5], "price": 1.2 } { "index": { "_index": "my-knn-index-1", "_id": "5" } } { "my_vector1": [4.5, 5.5], "price": 3.7 } { "index": { "_index": "my-knn-index-1", "_id": "6" } } { "my_vector2": [1.5, 5.5, 4.5, 6.4], "price": 10.3 } { "index": { "_index": "my-knn-index-1", "_id": "7" } } { "my_vector2": [2.5, 3.5, 5.6, 6.7], "price": 5.5 } { "index": { "_index": "my-knn-index-1", "_id": "8" } } { "my_vector2": [4.5, 5.5, 6.7, 3.7], "price": 4.4 } { "index": { "_index": "my-knn-index-1", "_id": "9" } } { "my_vector2": [1.5, 5.5, 4.5, 6.4], "price": 8.9 }

I executed exact nearest neighbor search:
(I also tried with POST)
GET my-knn-index-1/_search { "size": 4, "query": { "script_score": { "query": { "match_all": {} }, "script": { "source": "knn_score", "lang": "knn", "params": { "field": "my_vector2", "query_value": [2.0, 3.0, 5.0, 6.0], "space_type": "cosinesimil" } } } } }

As a result I received "query_shard_exception" error:
"failed to create query: class java.lang.Integer cannot be cast to class java.lang.Double (java.lang.Integer and java.lang.Double are in module java.base of loader 'bootstrap')"

Full message:
{ - "error": { - "root_cause": [ - { - "type": "query_shard_exception", "reason": "failed to create query: class java.lang.Integer cannot be cast to class java.lang.Double (java.lang.Integer and java.lang.Double are in module java.base of loader 'bootstrap')", "index_uuid": "2NpJ7PToT0SVy_YBsgmj-Q", "index": "my-knn-index-1" } ], "type": "search_phase_execution_exception", "reason": "all shards failed", "phase": "query", "grouped": true, "failed_shards": [ - { - "shard": 0, "index": "my-knn-index-1", "node": "u-6Qa_8HRW-unHxtYe5liw", "reason": { - "type": "query_shard_exception", "reason": "failed to create query: class java.lang.Integer cannot be cast to class java.lang.Double (java.lang.Integer and java.lang.Double are in module java.base of loader 'bootstrap')", "index_uuid": "2NpJ7PToT0SVy_YBsgmj-Q", "index": "my-knn-index-1", "caused_by": { - "type": "class_cast_exception", "reason": "class java.lang.Integer cannot be cast to class java.lang.Double (java.lang.Integer and java.lang.Double are in module java.base of loader 'bootstrap')" } } } ] }, "status": 400 }