Question

I have a basic ZeroMQ scenario consisting of two publishers and a subscriber. This has been working fine on a local computer until I decided to separate all process in different computers within my LAN. This is how I’m creating the ZeroMQ sockets (simplified Python code):

(Subscriber process running on machine with IP 192.168.1.52)

Publisher code (common for both publishers):

context = zmq.Context()
self.pub_socket = context.socket(zmq.PUB)
self.pub_socket.connect("tcp://192.168.1.52:5556")

Subscriber code:

context = zmq.Context()
self.sub_socket = context.socket(zmq.SUB)
self.sub_socket.bind("tcp://192.168.1.52:5556")
self.sub_socket.setsockopt(zmq.SUBSCRIBE, "")

I’ve tried entering tcp://127.0.0.1:5556 as the binding address:port for the subscriber but that makes no difference.

Answer 1

Thanks guys for your suggestions.

Firewalls were indeed disabled but finally found a PC which can receive from both publishers. It seems to be a problem related to the ZMQ versions installed on each computer. Senders had v.2.2 whilst the receiver had 2.1. It’s weird because I though that the zmq protocol was version agnostic. Need to remember this for next time.

Thanks again!