zeromq: how to prevent infinite wait?

Question

I just got started with ZMQ. I am designing an app whose workflow is:

1. one of many clients (who have random PULL addresses) PUSH a request to a server at 5555

Answer 1

The send wont block if you use ZMQ_NOBLOCK, but if you try closing the socket and context, this step would block the program from exiting..

The reason is that the socket waits for any peer so that the outgoing messages are ensured to get queued.. To close the socket immediately and flush the outgoing messages from the buffer, use ZMQ_LINGER and set it to 0..