Elastic search gives Bad request for ping - node.js

Question

Code in elasticsearch.js file
function es() {
throw new Error('Looks like you are expecting the previous "elasticsearch" module. ' +
'It is now the "es" module. To create a client with this module use ' +
'`new es.Client(params)`.');
}
es.Client = require('./lib/client');
es.ConnectionPool = require('./lib/connection_pool');
es.Transport = require('./lib/transport');
es.errors = require('./lib/errors');
module.exports = es;
var elasticsearch = require('elasticsearch')
var client = new es.Client({
host: 'localhost:9200',
log: 'trace',
})
// Ping the cluster
client.ping({
requestTimeOut: 30000,
},
function(error){
if(error) {
console.log(error)
console.error("elasticsearch cluster is down!")
}
else {
console.log("All is well")
}
})
and I am running elastic search locally with command $bin/elasticsearch
but when I do $node elasticsearch.js it gives the error saying
Elasticsearch INFO: 2018-01-22T11:17:50Z
Adding connection to http://localhost:9200/
Elasticsearch DEBUG: 2018-01-22T11:17:50Z
starting request {
"method": "HEAD",
"requestTimeout": 3000,
"castExists": true,
"path": "/",
"query": {
"requestTimeOut": 30000
}
}
Elasticsearch TRACE: 2018-01-22T11:17:50Z
-> HEAD http://localhost:9200/?requestTimeOut=30000
<- 400
Elasticsearch DEBUG: 2018-01-22T11:17:50Z
Request complete
{ Error: Bad Request
at respond (/Users/ElasticSearchServer/node_modules/elasticsearch/src/lib/transport.js:307:15)
at checkRespForFailure (/Users/ElasticSearchServer/node_modules/elasticsearch/src/lib/transport.js:266:7)
at HttpConnector.<anonymous> (/Users/ElasticSearchServer/node_modules/elasticsearch/src/lib/connectors/http.js:159:7)
at IncomingMessage.bound (/Users/ElasticSearchServer/node_modules/elasticsearch/node_modules/lodash/dist/lodash.js:729:21)
at emitNone (events.js:91:20)
at IncomingMessage.emit (events.js:185:7)
at endReadableNT (_stream_readable.js:974:12)
at _combinedTickCallback (internal/process/next_tick.js:80:11)
at process._tickCallback (internal/process/next_tick.js:104:9)
status: 400,
displayName: 'BadRequest',
message: 'Bad Request',
path: '/',
query: { requestTimeOut: 30000 },
body: undefined,
statusCode: 400,
response: '',
toString: [Function],
toJSON: [Function] }
elasticsearch cluster is down!
If I try adding new index, delete index, check the health or search, it works fine and gives the appropriate result.
Can anyone help me to fix the issue? thanks in advance!

Answer 1

In the new JavaScript client every option that is not intended for Elasticsearch lives in a second object, your code should be updated as follows:
'use strict'
const { Client } = require('#elastic/elasticsearch')
const client = new Client({ node: 'http://localhost:9200' })
client.ping({}, { requestTimeout: 20000 }, (err, response) => {
...
})
In the response object other than body, statusCode, and headers, you will also find a warnings array and a meta object, which should help you debug issues.
In this case, warnings contained the following message: 'Client - Unknown parameter: "requestTimeout", sending it as query parameter'.