[zeromq-dev] possible for XSUB to receive a message prior to XPUB getting subscription message?

Doron Somech somdoron at gmail.com
Sat Apr 9 09:49:12 CEST 2016

If verbose is set to false (default) you only get subscription the first
time it arrives, so it might be that.
On Apr 9, 2016 06:36, "John Muehlhausen" <jgm at jgm.org> wrote:

> I have a process running zmq_poll on an XPUB socket as well as a bunch of
> (very busy) non-zeromq fds.  zmq_init was called for '1' thread.  The
> number and rate of XPUB outbound (published) messages is relatively low.
> I'm pretty sure I observed the subscriber getting a published message well
> before the zmq_poll notification (on the publisher side) that the
> subscription message could be read.
> Does this make sense?  What can go wrong on the XPUB side?  If other
> clients have disappeared can this block reception of the next client's
> subscription message?  Do I need to use the zmq_ctx_set method to increase
> the priority of the zmq thread pool?  Does zmq_poll in any way prioritize
> non-zmq fds in a way that would skip over ready zmq sockets?
> Thanks for any thoughts or tips.
> -John
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