[zeromq-dev] Message queuing broker for mobile device

[Pieter Hintjens]

You can change the TCP socket keep alive setting, yes. See
http://api.zeromq.org/4-2:zmq-setsockopt#toc42

On Mon, Jan 12, 2015 at 10:43 AM, Gang Liu <gangban.lau at gmail.com> wrote:
> After some tracing, I found this case could be repeated when client
> socket in connected state and I power off Wi-Fi router
>  or turn off mobile device 3G DATA signal before zmq client do disconnect.
>
> Is there any way to enable broker's low level client TCP sockets
> KEEP_ALIVE option? I try to setopt at broker front end zsock,
> but don't help much. Yes, I am still thinking in BSD socket way. or do
> I need chose another zeromq pattern to handle clients no reliable inet
> connection?
>
> thanks for your kindly.
>
> regards,
> Gang
>
>
>
> On Mon, Jan 12, 2015 at 5:30 PM, Pieter Hintjens <ph at imatix.com> wrote:
>> These sockets are managed automatically by TCP.
>>
>> On Mon, Jan 12, 2015 at 7:41 AM, Gang Liu <gangban.lau at gmail.com> wrote:
>>> Dear all,
>>>             I am new to zeromq. I have a question about message
>>> queuing broker (msgqueue.c) which use zmq_proxy() forward msgs between
>>> frontend and backend.
>>>             In my testing code, the mobile client is using ZMQ_DEALER
>>> socket to connect to this broker. But after some time, I found there
>>> are more and more connected TCP at  broker server side, all in
>>> ESTABLISHED state. I am sure there are no more than ten clients and
>>> even all apps in closed state.
>>>             Because there are no way to get low level TCP sockets of
>>> broker, so is there any way to clean those "DEAD" TCP connections when
>>> clients at WI-FI or 3G env?
>>>
>>> regards,
>>> Gang
>>> _______________________________________________
>>> zeromq-dev mailing list
>>> zeromq-dev at lists.zeromq.org
>>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev
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