Socket hang up with ExpressJS

I’ve setup my server with elastic-apm-node, and it run ok. But after every period of time (30-60 min), it causes an error like below:

Error: socket hang up
    at createHangUpError (_http_client.js:331:15)
    at Socket.socketOnEnd (_http_client.js:423:23)
    at emitNone (events.js:111:20)
    at Socket.emit (events.js:208:7)
    at endReadableNT (_stream_readable.js:1055:12)
    at _combinedTickCallback (internal/process/next_tick.js:138:11)
    at process._tickDomainCallback (internal/process/next_tick.js:218:9)

This error made my server down too, so I need to restart it. After removed the code, everthing okay now. This is my config code:

require('elastic-apm-node').start({
  serviceName: '...',
  secretToken: '...',
  instrument: true,
  captureBody: 'all',
  errorOnAbortedRequests: true,
  serverUrl: 'http://...:8200',
  active: process.env.NODE_ENV === 'production'
})

Version

Elasticsearch, Kibana, APM v6.2.1
NodeJS v8.9.4
ExpressJS v4.15.2

I searched for this error, but there’s no results with apm-server. Is this a known issue, or my configuration miss something? Please help me to fix this. Thanks!

[jppellerin]

To chime in here: We were seeing the same Socket hang up error on version 1.1.1, running a hapi server. After updating to version 1.2.1, we have not seen the error again. Mind you, we have cut down our sample rate to 0.5.

For reference purposes, here is our config:

import Config from "./config/configuration";

import * as APM from "elastic-apm-node";
APM.start({
    active: Config.get("/elasticSearch/apm/active"),
    serviceName: Config.get("/elasticSearch/apm/serviceName"),
    serverUrl: Config.get("/elasticSearch/apm/url"),
    transactionSampleRate: 0.5
});

We will eventually try to up the transactionSampleRate back up to the default 100%, but are not setup to make the change safely at this point. Will follow up once we properly test.

[7agustibm]

I had the same problem. I configured APM Server with these values and I solved it.

apm-server.yml:

apm-server:
  host: 0.0.0.0:8200
  
output.elasticsearch:
  hosts: ['elasticsearch:9200']