How to search via elasticsearch in Node.js? - node.js

Question

I have indexed data from firebase via elasticSearch .
And Its Working Properly .
Now I am Searching data via firebase below cloud function :
exports.searchIt = functions.database.ref('/search/{key}')
.onUpdate(event => {
let key=event.params.key;
let elasticSearchConfig = functions.config().elasticsearch;
const esClient = new elastic.Client({
host: 'http://35.198.221.164',
log: 'error'
});
console.log('client Created');
let searchBody = {
size: 20,
from: 0,
query: {
match_all: {}
}
};
esClient.search({index: 'offers', body: searchBody})
.then(results => {
console.log('Successfully Entered');
results.hits.hits.forEach(
(hit, index) => console.log(hit)
)
})
.catch(console.error);
});
But this gives error below :
textPayload: "{ Error: Not Found at respond
(/user_code/node_modules/elasticsearch/src/lib/transport.js:307:15) at
checkRespForFailure
(/user_code/node_modules/elasticsearch/src/lib/transport.js:266:7) at
HttpConnector.
(/user_code/node_modules/elasticsearch/src/lib/connectors/http.js:159:7)
at IncomingMessage.bound
(/user_code/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._tickDomainCallback (internal/process/next_tick.js:128:9)
And on changing host to any other it still create client.
Why is this happening?