Node.js Connection failing on connecting to RabbitMQ - mysql

Question

I have a node.js app to be running with rabbitmq and mysql.
After setting everything up, when I do npm start
I have given the user administrator tag and permissions as
rabbitmqctl set_permissions RABBIT_USERNAME "." "." ".*"
It shows this error :
> node app.js
13:43
Started database log (Mon Jan 29 2018 13:43:42 GMT+0530 (IST))
13:43
Started mailer log (Mon Jan 29 2018 13:43:44 GMT+0530 (IST))
13:43
Started messaging log (Mon Jan 29 2018 13:43:44 GMT+0530 (IST))
13:43
Started messaging log (Mon Jan 29 2018 13:43:44 GMT+0530 (IST))
13:43
Started database log (Mon Jan 29 2018 13:43:44 GMT+0530 (IST))
13:43
Started socket log (Mon Jan 29 2018 13:43:44 GMT+0530 (IST))
13:43 messaging:3000 is listening..
13:43 DB connected (7)
13:43 DB connected (6)
13:43 Error:
Expected ConnectionOpenOk; got <ConnectionClose channel:0>
Error: Expected ConnectionOpenOk; got <ConnectionClose channel:0>
at /PATH/node_modules/amqplib/lib/connection.js:167:14
at /PATH/node_modules/amqplib/lib/connection.js:159:12
at Socket.recv (/PATH/node_modules/amqplib/lib/connection.js:497:12)
at Object.onceWrapper (events.js:255:19)
at Socket.emit (events.js:160:13)
at emitReadable_ (_stream_readable.js:520:10)
at emitReadable (_stream_readable.js:514:7)
at addChunk (_stream_readable.js:280:7)
at readableAddChunk (_stream_readable.js:256:11)
at Socket.Readable.push (_stream_readable.js:213:10)
at TCP.onread (net.js:599:20)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! messaging# start: `node app.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the messaging# start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /home/mishal23/.npm/_logs/2018-01-29T08_13_45_095Z-debug.log

Answer 1

There is no enough context on how this happened so I'm making a few assumptions:
RabbitMQ is not installed locally and it is installed on some server.
You're using amqplib for the connection. (Not an assumption)
You haven't created any Virtual Hosts.
Setting Up
So the first thing you need to do is to create a user if you haven't already.
sudo rabbitmqctl add_user admin password
sudo rabbitmqctl set_user_tags admin administrator
Run this command if you haven't enabled the Management Dashboard
sudo rabbitmq-plugins enable rabbitmq_management
By default, it runs on port 15672. So don't forget to open that port. And you can access this dashboard using your.server.ip.address:15672.
Now in this Management Dashboard, go to the Admin tab and on the right side, you'll see a link to Virtual Hosts.
There will be one virtual host named / and user guest (that you cannot access without localhost). Now create a new virtual host and check if it has the same user as you just created a few moments back (admin in this case).
Connecting to the RabbitMQ server
Use the string below to connect to the server instead of amqp://localhost
amqp://admin:password#your.server.ip.address/vhost_name
You can use this example (or any other examples) for the rest of the things...
I hope this helps!

Answer 2

Go to the rabbitmq dashboard > click admin menu > select your user from which you want to connect > click set permission button > restart server

Answer 3

In my case, the issue was related to heartbeat. You have to pass the heartbeat as a parameter to your connection URL:
amqps://user:password#domain/vhost_name?heartbeat=30