Connnection unsuccessful to elasticsearch on localhost .

[coolb0y]

Discussed in https://github.com/appbaseio/reactivesearch/discussions/1933

^{Originally posted by **coolb0y** April 25, 2022} I used the sandbox code https://codesandbox.io/s/0yn05 . I put my index name as app name and credentials I put which I created during elasticsearch installation "elastic:somepassword" format and also link I gave was https://localhost:9200 . After setting all the cors setting in elasticsearch.yml . I found this error console ` {"type":"default","status":400,"ok":false,"statusText":"Bad Request","headers":{"map":{"content-length":"88","content-type":"application/json"}},"url":"https://localhost:9200/dataserver/_reactivesearch.v3","_bodyInit":{},"_bodyBlob":{},"bodyUsed":true}` Please help me .

[stale[bot]]

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[coolb0y]

After One year I know the answer. This issue occurs either the index name you are providing is wrong i.e app name should be index name also this index should already exists in elasticsearch or opensearch if not create that index first. Second issue occurs which is mostly the case url="http://127.0.0.1:9200" app="datapp" credentials="user:pass" enableAppbase={false} enableAppbase should be false else it send request to /yourindex/_reactivesearch route which does not exists in elasticsearch instead of /yourindex/_msearch which exists in elasticsearch.