Node JS with Express leaking memory

Question

I am new to Node JS. I have a Node JS + Express app that is causing a Docker container to repeatedly stop with exit code 137 - out of memory error every 5-10 minutes.

The app could not be more simple serving up static html, css, js and images

const express = require('express')
const app = express()
const port = 8080

app.use(express.static('public'))

app.get('/', (req, res) => {
  res.sendFile('index.html', { root: __dirname + "/public" } );
})

app.listen(port, () => {
  console.log(`web app listening at http://localhost:${port}`)
})

Directory structure

--root
    server.js
    --public
        index.html
        --css
        --js
        --img

The host is an ECS EC2 instance - T2 small with 2Gb memory. The container task allocation 1024 MiB of memory.

Dockerfile

# from nodes 12 image 
FROM node:12
MAINTAINER coco


# Create app directory
WORKDIR /usr/src/app


# Install app dependencies
COPY package*.json ./


RUN npm install


# Bundle app source - copy all files/folders in current directory
COPY . .


# Specify ports
EXPOSE 8080


# Run the app
CMD [ "node", "server.js" ]

What about this Node app is causing a memory leak? Though, it may be express that's leaking. I'm using express 4.17.1

Node JS with Express leaking memory

0 Answers