heroku-examples/node-workers-example

A simple example of using Redis to coordinate a worker process

Background Jobs in Node.js with Redis

Redis-backed background worker example using OptimalBits/bull and throng.

Installing Local Dependencies

• Redis

$ brew install redis
$ brew services start redis

Getting Started

1. npm install
2. npm start
3. http://localhost:5000

Deploying

$ git clone [email protected]:heroku-examples/node-workers-example.git
$ cd node-workers-example

$ heroku create
$ heroku addons:create heroku-redis
$ git push heroku main
$ heroku ps:scale worker=1
$ heroku open

Application Overview

The application is comprised of two process:

• web - An Express server that serves the frontend assets, accepts new background jobs, and reports on the status us existing jobs
• worker - A small node process that listens for and executes incoming jobs

Because these are separate processes, they can be scaled independently based on specific application needs. Read the Process Model article for a more in-depth understanding of Heroku’s process model.

The web process serves the index.html and client.js files which implement a simplified example of a frontend interface that kicks off new jobs and checks in on them.

node-workers-example's Issues

[deleted]

Problem with background jobs on heroku

Hello guys. I'm trying to run this same example on heroku, but it's not working. It looks like heroku works differently for working with background jobs and they provide an example with nodejs https://devcenter.heroku.com/articles/node-redis-workers and https://github.com/heroku-examples/ node-workers-example, but I can't transport this to nestjs and also using redis. Does anyone please have a solution or an example I can use? I scoured the web and found nothing. In the end, the application ends up giving this error "maxRetriesPerRequestError: Reached the max retries per request limit (which is 20). Refer to "maxRetriesPerRequest" option for details"