Nodejs - Axios - Timeouts lead to memory leak - node.js

Question

I'm running an app which basically:
Receives a request through Express.js
Send multiples requests to various endpoints
Once those endpoints responses, we compute a response and send it to the client.
I'm using Axios Instances per endpoints to send the requests.
const axios = require('axios');
const Agent = require('agentkeepalive');
const { HttpsAgent } = Agent;
const httpKeepAliveAgent = new Agent({
maxSockets: 100,
maxFreeSockets: 10,
timeout: 60000, // active socket keepalive for 60 seconds
freeSocketTimeout: 30000, // free socket keepalive for 30 seconds
});
const httpsKeepAliveAgent = new HttpsAgent({
maxSockets: 100,
maxFreeSockets: 10,
timeout: 60000, // active socket keepalive for 60 seconds
freeSocketTimeout: 30000, // free socket keepalive for 30 seconds
});
const createAxiosInstance = () => axios.create({
httpAgent: httpKeepAliveAgent,
httpsAgent: httpsKeepAliveAgent,
maxRedirects: 10,
});
I send requests to third party endpoint using the following
const fakeServer = require('../test/fake-server');
const logger = require('../utils/logger');
const { LOG_VERBOSE } = process.env;
// let promiseCount = 0;
module.exports = async (axiosInstance, ssp, payload, endpoint, method, timeout, headers) => {
const cmd = process.env.NODE_ENV === 'test' ? fakeServer : axiosInstance;
const start = Date.now();
const config = {
ssp,
url: endpoint,
method,
timeout,
headers: {
'Content-Type': 'application/json; charset=utf-8;',
Accept: 'application/json',
},
data: payload,
};
if (headers !== undefined && typeof headers === 'object') {
// eslint-disable-next-line no-return-assign
Object.keys(headers).forEach((key) => config.headers[key] = headers[key]);
}
try {
const response = await cmd(config);
return {
ssp,
uri: config.url,
requestbody: payload,
requestheaders: config.headers,
responsebody: response.data,
status: response.status,
responsetimemillis: Date.now() - start,
};
} catch (error) {
if (LOG_VERBOSE === 'true') logger.error(`Error on ${ssp} call: ${error.message}`);
let responsebody;
let status;
if (error.response === undefined) {
responsebody = error.code;
status = error.code;
} else {
responsebody = error.response.data ? error.response.data : error.message;
status = error.response.status;
}
return {
ssp,
uri: config.url,
requestbody: payload,
requestheaders: config.header,
responsebody,
status,
responsetimemillis: Date.now() - start,
};
}
};
The issues is that when I get timeouts or 400 error, there might happen some memory leaks, I can't get a successful linked connection, and so at the end the app crashes...
Any ideas?

Answer 1

https://github.com/axios/axios/issues/2783
maxRedirects may be causing this issue, try setting lower redirects or 0, as the resolved issue suggests.