# I have facing issue in elastic search cosinesimilarity module. I have made my mappings correct which was suggested by most people, but still facing the issue **URL:** \ **Category:** Elasticsearch\ **Created:** [December 2, 2019, 10:34am UTC](https://discuss.elastic.co/t/i-have-facing-issue-in-elastic-search-cosinesimilarity-module-i-have-made-my-mappings-correct-which-was-suggested-by-most-people-but-still-facing-the-issue/210155 "2019-12-02T10:34:46Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Divyanshu\_Pandey](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/divyanshu_pandey/32/45452_2.png) [@Divyanshu\_Pandey](https://discuss.elastic.co/u/Divyanshu_Pandey)\ **Post date:** [December 2, 2019, 10:34am UTC](https://discuss.elastic.co/t/i-have-facing-issue-in-elastic-search-cosinesimilarity-module-i-have-made-my-mappings-correct-which-was-suggested-by-most-people-but-still-facing-the-issue/210155/1 "2019-12-02T10:34:46Z")
MAPPINGs--\> { "settings" : { "posts" : { "number\_of\_shards" : 1, "number\_of\_replicas" : 1 }, ``` "mappings": { "properties": { "title_vector": { "type": "dense_vector", "dims": 3 }, "comment": { "type":"text" } } } } ``` } INPUT QUERY --\> { "query": { "script\_score": { "query": { "match\_all": {} }, "script": { "source": "cosineSimilarity(params.queryVector, doc['title\_vector'])", "params": { "queryVector": [0.6226563516985381,0.24777450998447703,0.16749395455557237] } } } } } OUTPUT ERROR--\> { "error": { "root\_cause": [ { "type": "script\_exception", "reason": "runtime error", "script\_stack": [ "cosineSimilarity(params.queryVector, doc['title\_vector'])", " ^---- HERE" ], "script": "cosineSimilarity(params.queryVector, doc['title\_vector'])", "lang": "painless" } ], "type": "search\_phase\_execution\_exception", "reason": "all shards failed", "phase": "query", "grouped": true, "failed\_shards": [ { "shard": 0, "index": "posts", "node": "IkCDVw5AR02qqOi0-EixKQ", "reason": { "type": "script\_exception", "reason": "runtime error", "script\_stack": [ "cosineSimilarity(params.queryVector, doc['title\_vector'])", " ^---- HERE" ], "script": "cosineSimilarity(params.queryVector, doc['title\_vector'])", "lang": "painless", "caused\_by": { "type": "class\_cast\_exception", "reason": "class org.elasticsearch.index.fielddata.ScriptDocValues$Doubles cannot be cast to class org.elasticsearch.xpack.vectors.query.VectorScriptDocValues$DenseVectorScriptDocValues (org.elasticsearch.index.fielddata.ScriptDocValues$Doubles is in unnamed module of loader 'app'; org.elasticsearch.xpack.vectors.query.VectorScriptDocValues$DenseVectorScriptDocValues is in unnamed module of loader java.net.FactoryURLClassLoader @204e90f7)" } } } ] }, "status": 400 } ---
**Author:** ![mayya](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mayya/32/83147_2.png) [@mayya](https://discuss.elastic.co/u/mayya)\ **Post date:** [December 2, 2019, 9:05pm UTC](https://discuss.elastic.co/t/i-have-facing-issue-in-elastic-search-cosinesimilarity-module-i-have-made-my-mappings-correct-which-was-suggested-by-most-people-but-still-facing-the-issue/210155/2 "2019-12-02T21:05:48Z")
@Divyanshu_Pandey Did you first request of creating mapping succeed? If not, please use elasticsearch with at least basic license where `dense_vector` field mapping is available. If yes, and you already using elasticsearch with basic license, I would suggest to make sure to query the proper index where `title_vector` is defined as `dense_vector`. ---
**Author:** ![Divyanshu\_Pandey](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/divyanshu_pandey/32/45452_2.png) [@Divyanshu\_Pandey](https://discuss.elastic.co/u/Divyanshu_Pandey)\ **Post date:** [December 3, 2019, 7:03am UTC](https://discuss.elastic.co/t/i-have-facing-issue-in-elastic-search-cosinesimilarity-module-i-have-made-my-mappings-correct-which-was-suggested-by-most-people-but-still-facing-the-issue/210155/3 "2019-12-03T07:03:23Z")
mapping got created...the data got stored in the elastic search db...on basic query it is giving correct output....The query index is correct. There is some issue with the similarity function. I am not getting the right syntax...The version is also the latest one 7.4.2 ---
**Author:** ![mayya](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mayya/32/83147_2.png) [@mayya](https://discuss.elastic.co/u/mayya)\ **Post date:** [December 3, 2019, 3:17pm UTC](https://discuss.elastic.co/t/i-have-facing-issue-in-elastic-search-cosinesimilarity-module-i-have-made-my-mappings-correct-which-was-suggested-by-most-people-but-still-facing-the-issue/210155/4 "2019-12-03T15:17:19Z")
Your script works for me well on 7.4. Here is the result: ```auto { "took": 8, "timed_out": false, "_shards": { "total": 1, "successful": 1, "skipped": 0, "failed": 0 }, "hits": { "total": { "value": 1, "relation": "eq" }, "max_score": 1, "hits": [ { "_index": "test_index", "_type": "_doc", "_id": "1", "_score": 1, "_source": { "title_vector": [ 0.6226563516985381, 0.24777450998447703, 0.16749395455557237 ] } } ] } } ``` This error "org.elasticsearch.index.fielddata.ScriptDocValues$Doubles cannot be cast to class org.elasticsearch.xpack.vectors.query.VectorScriptDocValues$DenseVectorScriptDocValues" indicates that your `title_vector` is not of a type of `dense_vector`, but of type `double`. Make sure that your mapping request worked, but getting it back . and confirming that your `title_vector` is indeed of type `dense_vector`. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [December 31, 2019, 3:17pm UTC](https://discuss.elastic.co/t/i-have-facing-issue-in-elastic-search-cosinesimilarity-module-i-have-made-my-mappings-correct-which-was-suggested-by-most-people-but-still-facing-the-issue/210155/5 "2019-12-31T15:17:29Z")
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