[zeromq-dev] Pub/Sub problem using sleep

Chuck Remes lists at chuckremes.com
Mon Oct 29 09:22:15 CET 2012

Give us a link (use pastie.org, gist.github.com, etc) of the *exact same* code you are compiling and running. We need to see what you are doing.


On Oct 29, 2012, at 3:18 AM, Ineil wrote:

> I have recently started to evaluate 0MQ, and as part of this evaluation I was trying the Pub/Sub example (Weather update client & server) from the guide. I compiled the C++ version and everything appeared to work fine.
> I then tried updating the server, to slow down its rate of transmission. I added a sleep(1) (I also tried nanosleep to give shorter delays) to the end of the main loop and this stopped things working. 
> The server continues to go slowly round the main loop, but clients no longer receive messages. A WireShark trace shows that clients still connect and exchange a number of messages with the server, but the clients are never sent the weather update messages. 
> I assume it is reasonable to put a delay in the main loop, hence I am assuming there is a problem somewhere here. 
> If it is relevant, I have zeromq version 3.2.1 compiled and running on Ubuntu 12.04.
> Any ideas. 
> Thanks,
> Dave.
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