[zeromq-dev] ZMQ_SERVER blocks on send() rather than returning EAGAIN

[Pieter Hintjens]

OK, thanks. Done.

On Mon, Apr 4, 2016 at 1:01 PM, Doron Somech <somdoron at gmail.com> wrote:
> In the end, the For procrssing outgoing messages, the bullet " SHALL NOT
> block on sending." Is incorrect. Shell block, shloud not block if DONT WAIT
> is used
>
> On Apr 4, 2016 13:40, "Pieter Hintjens" <ph at imatix.com> wrote:
>>
>> Doron, we need to fix the man page then. Can you read the RFC
>> http://rfc.zeromq.org/spec:41 and tell me which pieces exactly are
>> incorrect? I'll do the rest.
>>
>> On Mon, Apr 4, 2016 at 10:04 AM, Doron Somech <somdoron at gmail.com> wrote:
>> > You have to specify ZMQ_DONT_WAIT for the send method to return eagain
>> > instead of blocking.
>> >
>> > On Mon, Apr 4, 2016 at 5:31 AM, Robert Holterhoff <datax1969 at gmail.com>
>> > wrote:
>> >>
>> >> I'm using the "unstable" 4.2.0 release and have a question regarding
>> >> ZMQ_SERVER sockets.
>> >>
>> >> The documentation suggests that ZMQ_SERVER sockets will not block but
>> >> return EAGAIN when the HWM is reached.  I am finding that the send()
>> >> blocks instead.
>> >>
>> >> Actually, this is exactly the behaviour I want so I'm not complaining.
>> >> My
>> >> app works beautifully, running at full rate, quickly filling up various
>> >> clients queues and then automatically rate-limiting to the slowest
>> >> client
>> >> because of the blocking behaviour.
>> >>
>> >> However, I made the observation that the "back-off" part of the code
>> >> which
>> >> I had written expecting EGAIN to be returned is never exercised.
>> >>
>> >> I just want to know if I can rely on this behaviour in the future so I
>> >> can
>> >> remove my hacky arbitrary "sleep-for-a-bit back-off" code, or if this
>> >> is a
>> >> bug because SERVER/CLIENT sockets are still in their infancy.
>> >>
>> >> Thanks,
>> >>
>> >> Rob Holterhoff
>> >>
>> >>
>> >> _______________________________________________
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>> >> zeromq-dev at lists.zeromq.org
>> >> http://lists.zeromq.org/mailman/listinfo/zeromq-dev
>> >
>> >
>> >
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>> >
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