There doesn't seem to be anything about how it signals that the high water mark happened. Unless I didn't read it thoroughly enough.

"When a/ZMQ_PUB/socket enters an exceptional state due to having reached the high water mark for a/subscriber/, then any messages that would be sent to the/subscriber/in question shall instead be dropped until the exceptional state ends. The/zmq_send()/function shall never block for this socket type."

On 09/07/2012 3:32 PM, Ian Barber wrote:


On Mon, Jul 9, 2012 at 9:29 PM, Ian Barber <[email protected] <mailto:[email protected]>> wrote:



    This is pretty much how it works with most socket types - if you
    use the ZMQ_NOBLOCK flag, you'll get the EAGAIN if you've hit HWM.

    Ian


You can see all of the HWM responses here: http://api.zeromq.org/2-1:zmq-socket

Ian



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