No mapping found for [timestamp] in order to sort on

I have developed a small node.js server, which will use the elasticsearch npm module to get the latest JSON document based on timestamp.

Here is the code for it,

let express = require('express');
let app = express();
let elasticsearch = require('elasticsearch');

app.listen(3000, function() {
    console.log('Example app listening on port 3000!');

let client = new elasticsearch.Client({
    host: ['http://localhost:9200']
    requestTimeout: 30000,
}, function(error) {
    if (error) {
        console.error('elasticsearch cluster is down!');
    } else {
        console.log('Everything is ok');

async function getResponse() {

    const response = await{
        index: 'weather',
        type: 'doc',
        body: {
            sort: [{ "timestamp": { "order": "desc" } }],
            size: 1,
            query: { match_all: {} }




When In run the code, I get an error like this,

(node:11372) UnhandledPromiseRejectionWarning: Error: [query_shard_exception] No mapping found for [timestamp] in order to sort on, with { index_uuid="j-TaPYgLRhuYyiJJjg1tYg" & index="weather" }

Is there anything wrong with the search config? Would appreciate if anybody could help. Thanks!

What is the mapping of your weather index?

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