Unhandled rejection Error: Incorrect HTTP method for uri [/randomindex] and method [POST], allowed: [PUT, DELETE, GET, HEAD]

[sugizo]

$ npm start

autocompleter@0.0.0 start /Users/sugizo/js/learn/express.js-elasticsearch-autocomplete
node ./bin/www

Elasticsearch INFO: 2017-11-21T03:21:53Z
Adding connection to http://localhost:9200/

Unhandled rejection Error: Incorrect HTTP method for uri [/randomindex] and method [POST], allowed: [PUT, DELETE, GET, HEAD]
at respond (/Users/sugizo/js/learn/express.js-elasticsearch-autocomplete/node_modules/elasticsearch/src/lib/transport.js:264:15)
at checkRespForFailure (/Users/sugizo/js/learn/express.js-elasticsearch-autocomplete/node_modules/elasticsearch/src/lib/transport.js:223:7)
at HttpConnector. (/Users/sugizo/js/learn/express.js-elasticsearch-autocomplete/node_modules/elasticsearch/src/lib/connectors/http.js:155:7)
at IncomingMessage.wrapper (/Users/sugizo/js/learn/express.js-elasticsearch-autocomplete/node_modules/lodash/index.js:3095:19)
at emitNone (events.js:111:20)
at IncomingMessage.emit (events.js:208:7)
at endReadableNT (_stream_readable.js:1056:12)
at _combinedTickCallback (internal/process/next_tick.js:138:11)
at process._tickCallback (internal/process/next_tick.js:180:9)

[RaananW]

What version of elasticsearch are you using?

[sugizo]

elasticsearch-6.0.0

[jreyes88]

I am getting this issue, too, using elasticsearch-6.1.1

[RaananW]

please note, this was written (2 years ago) for elasticsearch 2. Code needs to be modified to fit the new API.
Whenever I will find the time, I will dive into the new ES API. Not in the near future thou