Hello everyone, I've got two questions about router sockets.
First, it seems I must wait for a while after connecting a router socket before sending data to its newly connected destination using pyzmq. This simple use case <http://pastebin.com/kPK2ZAc5> shows the problem on my system using pyzmq 13.0.0 with zeromq 3.2.2 (Arch Linux, kernel 3.9.9, GCC 4.8.1): Most of the time it runs correctly and terminates, but sometimes it prints up to around 900 and stall there. Note that adding a sleep before sending (I tried with ~50ms) always make the code works. The router socket always exhibits its POLLOUT flag even if the connection isn't ready to send to a newly connected peer. Is there a way to ask the zeromq socket when it's ready to accept messages to a given host without dropping them, aside from manually specifying a sleep? My second question is about sending. Still using a router socket, you could set as destination anything you'd like (even if the socket isn't currently connected to a peer with this identity). Is there a way to know if a connection is currently available for sending (ie. the message will be sent immediately, like POLLOUT for a given peer)? I've tried setting the socket's ZMQ_SNDTIMEO to zero and try sending using the ZMQ_NOBLOCK to see if it would raise (in pyzmq) an ZMQ_EAGAIN error, but it always seems to pass without problem even when there is nobody listening. A minimal code exhibiting my comprehension of how it should work can be found here <http://pastebin.com/zQE2Awt4>. Is there something I haven't understood about how it's supposed to work? Thanks for you help, Yannick Hold
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