[zeromq-dev] Message queuing broker for mobile device

[Gang Liu]

I already tried this way(set
ZMQ_TCP_KEEPALIVE/ZMQ_TCP_KEEPALIVE_CNT/ZMQ_TCP_KEEPALIVE_IDLE/ZMQ_TCP_KEEPALIVE_INTVL
 at broker front end zsock), it seems these setting don't apply to new
incoming connection. I will try again.

regards,
Gang

On Mon, Jan 12, 2015 at 5:57 PM, Pieter Hintjens <ph at imatix.com> wrote:
> 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
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