[zeromq-dev] REQ-REP Timeouts in PyZMQ

Dustin Webb daemonmaker at gmail.com
Fri Nov 21 15:19:18 CET 2014


Is it necessary to do polling? I would prefer the client simply wait
indefinitely. I also notice that the example solution uses threads which I
was hoping to avoid for simplicity.

On Fri Nov 21 2014 at 09:10:20 Benjamin <benjamin.l.cordes at gmail.com> wrote:

> Hi,
>
> here is an example with polling:
> https://github.com/imatix/zguide/blob/master/examples/Python/asyncsrv.py
> So the client raises an exception after a pre-defined time-period (1
> second e.g.)
>
> Check out the socket options here
> http://api.zeromq.org/4-1:zmq-setsockopt   (ZMQ_RCVTIMEO and
> ZMQ_SNDTIMEO)
>
> On Fri, Nov 21, 2014 at 2:25 PM, Dustin Webb <daemonmaker at gmail.com>
> wrote:
> > Greetings everyone,
> >
> > I have recently written a train_extension for Pylearn2 that uses PyZMQ to
> > let me query for data from my experiments. My train_extension works in
> > conjunction with a client that queries for the data and plots the
> response.
> > The train_extension receives and responds to requests for data after each
> > training epoch. However these training epochs can take a long time to
> run,
> > e.g. any where from minutes to hours in the normal cases. As such I'm
> > wondering about timeout behavior. Put simply, will the connections
> timeout?
> > And if so, under what conditions and how will the timeouts manifest? In
> > other words, will the send on the client raise a TimeOut exception after
> a
> > certain period of time? And on the server side, what will happen to a
> > request that was received hours earlier?
> >
> > Thanks in advance,
> > Dustin Webb
> > Undefined Intelligence
> > Algorithmic Robotics Lab
> > Laboratoire d'Informatique des Systemes Adaptatifs
> >
> > _______________________________________________
> > zeromq-dev mailing list
> > zeromq-dev at lists.zeromq.org
> > http://lists.zeromq.org/mailman/listinfo/zeromq-dev
> >
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