[zeromq-dev] odd error from pyzmq

[Osiris Pedroso]

Isn't the problem that both sides are binding?
I believe one side should bind, the other should connect.

On Fri, Feb 26, 2016 at 1:15 PM Jerry Scharf <scharf at lagunawayconsulting.com>
wrote:

> Hi,
>
> That's not it. I added a gethostbyname to the code, that works but the
> bind still fails. I did a simple socket connect to the host/port in python
> and that works fine (no error, netstat shows the connection.)
>
> I think the code is pretty generic, I tried to keep it as simple as
> possible to start with.
>
> Here's master (client) side code:
>
>     cmdsock = zc.socket(zmq.REQ)
>     evsock = zc.socket(zmq.SUB)
>
>
>     cmdport = 10011
>     subport = 10012
>
>     hostip = socket.gethostbyname(hostname)
>     evconn = "tcp://{}:{}".format(hostip, subport)
>     evsock.bind(evconn)
>     cmdconn = "tcp://{}:{}".format(hostname, cmdport)
>     cmdsock.bind(cmdconn)
>
>
> here's the listener side code
>
>     mzcontext = zmq.Context()
>
>     rrportnum = 10011
>     psportnum = 10012
>
>     rrsock = mzcontext.socket(zmq.REP)
>     rrsockstr = "tcp://*:{0}".format(rrportnum)
>     rrsock.bind(rrsockstr)
>
>     pssock = mzcontext.socket(zmq.PUB)
>     pssock.bind("tcp://*:{0}".format(psportnum))
>
>
>
> On 02/26/2016 12:16 AM, MinRK wrote:
>
> Typically, with bind you want an IP address. Often a domain works, but it
> requires that zeromq can resolve that domain to a *local* IP address of
> the machine. This won’t work, for instance, if your raspberry pi is behind
> a router. You can listen on all IPs by using 'tcp://*:10011'.
>
> -MinRK
>
> On Fri, Feb 26, 2016 at 1:11 AM, Jerry Scharf <
> scharf at lagunawayconsulting.com> wrote:
>
>> Hi,
>>
>> I'm working further into things. I have the raspberry pi side working
>> happily and am now trying to get the ubuntu master side working. I am
>> running python 3.4 and did the install from pip with no errors. (I am
>> running python2.7 on the pi side to get spi routines...)
>>
>> The socket create works fine, but wen I try to bind to my host as a
>> fully qualified hostname:port (in this case
>> "bank0pi.lt.in.finsix.com:10011" I get this stackdump:
>>
>> File "/home/jerry/finsix/marathon/master/simple/m_zmq.py", line 29, in
>> bank_setup
>>     evsock.bind(evconn)
>>    File "zmq/backend/cython/socket.pyx", line 487, in
>> zmq.backend.cython.socket.Socket.bind (zmq/backend/cython/socket.c:5156)
>>     File "zmq/backend/cython/checkrc.pxd", line 25, in
>> zmq.backend.cython.checkrc._check_rc (zmq/backend/cython/socket.c:7535)
>> zmq.error.ZMQError: No such device
>>
>> What device is it looking for?? I check with host and the name resolves
>> fine.
>>
>> tia,
>> jerry
>>
>> _______________________________________________
>> zeromq-dev mailing list
>> zeromq-dev at lists.zeromq.org
>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev
>>
> ​
>
>
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