[zeromq-dev] HWM in 2.1

Koert Kuipers Koert.Kuipers at diamondnotch.com
Sun Jan 9 23:23:55 CET 2011

I do not see same behavior in Java. Does it have something to do with python bindings for 2.1.0 (pyzmq-2.1.0dev)?

**********  Test.java  **********
import org.zeromq.ZMQ;

public class Test {
    public static void main(String[] args) {
                final ZMQ.Context context = ZMQ.context(1);
                final ZMQ.Socket socket = context.socket(ZMQ.PUSH);
                for (int i=0; i <1000; i++) {
                    socket.send(new byte[0], 0);

From: zeromq-dev-bounces at lists.zeromq.org [mailto:zeromq-dev-bounces at lists.zeromq.org] On Behalf Of Koert Kuipers
Sent: Sunday, January 09, 2011 4:50 PM
To: ZeroMQ development list
Subject: [zeromq-dev] HWM in 2.1

The little python program below connects to a socket where nobody is listening. With zmq 2.0.10 it would halt after 100 messages. However with zmq 2.1.0 it keeps going all the way to 1000 messages. Why is this? I see this behavior both under Linux and Windows.

**********  test.py  **********
import zmq
context = zmq.Context()
socket = context.socket(zmq.PUSH)
socket.setsockopt(zmq.HWM, 100)
for i in range(1, 1000):
    print i
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