Strongloop controller in cluster mode results in EADDRINUSE

Question

I'm building an API with Strongloops's Loopback. I'm following this tutorial and so far it's working when I run the app with

slc run

However, if I try to run the app in clustered mode (to take advantage of a dual core server) the second process throws an EADDRINUSE error.

My config.json reads

{
    "restApiRoot": "/v1",
    "host": "0.0.0.0",
    "port": 5000,
    "url": "http://0.0.0.0:5000/"
}

much like in the example (except for the port). I haven't been able to find documentation of how (or if) should I modify this config.

Has anyone ran slc in cluster mode? Does anyone have experience on running Node in clustered mode? (I know foreman allows something like this).

Thanks!

Is line 33 to 44 included in your server.js ? Seems like the spawned workers are attaching to same port as server. — Alvin K.
Yes, my app has those exact lines. I created the app with slc loopback but that part is identical to the example app. — ffflabs

RandM RandM · Accepted Answer · 2014-08-14T22:29:21

What command did you use to run the app in a cluster?

You should use something like

slc run --cluster cpus

Rand