Error 111 connecting to localhost:6379. Connection

Question

I am able to run redis locally and everything works.

However when I deploy to heroku I get this error:

Error 111 connecting to localhost:6379. Connection refused. 

I have set up a Procfile with...

web: gunicorn odb.wsgi --log-file -
worker: python worker.py

I have a worker.py file...

import os
import urlparse
from redis import Redis
from rq import Worker, Queue, Connection

listen = ['high', 'default', 'low']

redis_url = os.getenv('REDISTOGO_URL')
if not redis_url:
    raise RuntimeError('Set up Redis To Go first.')

urlparse.uses_netloc.append('redis')
url = urlparse.urlparse(redis_url)
conn = Redis(host=url.hostname, port=url.port, db=0, password=url.password)

if __name__ == '__main__':
with Connection(conn):
    worker = Worker(map(Queue, listen))
    worker.work()

A REDISTOGO_URL variable appears in the heroku config.

Redis to go is an installed add-on for my app.

Does REDISTOGO_URL have to be defined in settings.py? Why is heroku trying to connect to the local host when it is not even defined in worker.py?

Answer 1

Error 111 is thrown when the application is unable to contact Redis. I had the same problem following the Heroku Django Channels tutorial. The settings.py file should read:

CHANNEL_LAYERS = {
    "default": {
        "BACKEND": "asgi_redis.RedisChannelLayer",
        "CONFIG": {
            "hosts": [os.environ.get('REDISCLOUD_URL', 'redis://localhost:6379')],
        },
        "ROUTING": "chat.routing.channel_routing",
    },
}

REDISCLOUD_URL instead of REDIS_URL.

Ensure Redis is installed on the Heroku server.

Answer 2

May be not directly related to your question but I was facing same error and it turn out that on my system redis-server package was not installed.

Problem was resolved with,

Ubuntu: sudo apt-get install redis-server

Cent OS: sudo yum install redis