[zeromq-dev] Message queuing broker for mobile device

[Pieter Hintjens]

You must set these before doing a bind or connect.

On Mon, Jan 12, 2015 at 11:07 AM, Gang Liu <gangban.lau at gmail.com> wrote:
> 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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>>>>> zeromq-dev at lists.zeromq.org
>>>>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev
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