Re: [zeromq-dev] Lost message with PUSH/PULL

[Doron Somech]

I think it might be the ZeroMQ behavior (which is probably a bug), once the
connection is open ZeroMQ start to queue messages for the connection, even
if handshake is not yet completed, so when you do telnet the message is not
discarded but queue for the telnet connection.

I think only PUSH is affected by this behavior, also fixing it might be
hard, it also might be security issue, right now PUSH socket type is not
safe for internet use because of this.

If you can I suggest you reverse the bind/connection so PUSH will connect
and PULL will bind. If not an option try to use ROUTER instead and have
some kind of handshake.

Nice catch, I still want to make sure that is really what happen and see if
it possible to fix this easily..

On Thu, Jun 30, 2016 at 11:32 AM, 王运来  wrote:

> Hi every guys:
>I got a problem which ZMQ will lost some messages with PUSH/PULL
> ZMQ socket.
>The scene like this:
>A: PUSH socket, bind address "tcp://*.1209"
>B: PULL socket, connect to "tcp://localhost:1209"
>
>Run the command "telnet localhost 1209" while A sending message to
> B.
>
>The result is B will miss  messages even if I set the option
> of ZMQ_IMMEDIATE to 1 like this:
>int immediate = 1;
>zmq_setsockopt(pSock, ZMQ_IMMEDIATE, , sizeof(immediate));
>
>   Is it right in this scene or is it should be?
>
>
>
>
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Re: [zeromq-dev] Lost message with PUSH/PULL

[Dermot Doran]

The latest API documentation does suggest that messages are NOT discarded.
It would probably help everybody if you could provide the code (or at least
recreate your problem with a simpler example).  Creating a simple example
might even lead you to discover what is going wrong.  So it is definitely
well worth the effort!

On 30 June 2016 at 10:32, 王运来  wrote:

> Hi every guys:
>I got a problem which ZMQ will lost some messages with PUSH/PULL
> ZMQ socket.
>The scene like this:
>A: PUSH socket, bind address "tcp://*.1209"
>B: PULL socket, connect to "tcp://localhost:1209"
>
>Run the command "telnet localhost 1209" while A sending message to
> B.
>
>The result is B will miss  messages even if I set the option
> of ZMQ_IMMEDIATE to 1 like this:
>int immediate = 1;
>zmq_setsockopt(pSock, ZMQ_IMMEDIATE, , sizeof(immediate));
>
>   Is it right in this scene or is it should be?
>
>
>
>
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> zeromq-dev@lists.zeromq.org
> http://lists.zeromq.org/mailman/listinfo/zeromq-dev
>
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Re: [zeromq-dev] Erlang implementation of ZMTP 3.1

[Elliot Crosby-McCullough]

Hi Andriy,

Glad to see a full BEAM implementation.

I've been working on something similar in Elixir (
https://github.com/SmartCasual/elixir-zeromq) but since you've gotten
further in Erlang I'll take a look at contributing Curve support to yours
instead, since all I really wanted was native BEAM instead of a binding to
the C library given the dangers and/or inefficiencies of doing so.

I'll have to look more closely into the licensing you've gone for to see
whether it's compatible with my needs.

Small note, but what you've got there is an implementation not a binding
(which is a good thing).  It would be a binding if it used e.g. the C
library to do the work.

Regards,
Elliot

On 28 June 2016 at 18:09, Andriy Drozdyuk  wrote:

> At Pieter's suggestion, I am putting this here:
> https://github.com/chovencorp/erlangzmq
>
> Native erlang 18 implementation of ZMTP 3.1 (including resource property),
> but without any security.
>
> Hopefully it will be useful to people. I know I'll use it myself - since
> all (native) erlang bindings are out of date.
>
> This is a six month young project, so this is NOT performance or
> otherwise tested at all, and I would appreciate any feedback (just take a
> second to file an issue).
>
> Thank you,
> --Andriy Drozdyuk
>
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[zeromq-dev] Lost message with PUSH/PULL

[王运来]

Hi every guys:
   I got a problem which ZMQ will lost some messages with PUSH/PULL ZMQ 
socket.
   The scene like this:
   A: PUSH socket, bind address "tcp://*.1209"
   B: PULL socket, connect to "tcp://localhost:1209"
   
   Run the command "telnet localhost 1209" while A sending message to B.


   The result is B will miss  messages even if I set the option of 
ZMQ_IMMEDIATE to 1 like this:
   int immediate = 1;
   zmq_setsockopt(pSock, ZMQ_IMMEDIATE, , sizeof(immediate));


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Re: [zeromq-dev] Erlang implementation of ZMTP 3.1

[Pieter Hintjens]

In terms of getting patches back to the project, any share-alike
license will work. In terms of adoption, xGPL irritates some people.
So MPLv2 is a good compromise, and has worked well on the projects
where we use it.

So my strong recommendation for long term success is:

- read http://zeromq.org/docs:organization
- use MPLv2 and the C4 process
- bring the project into the ZeroMQ organization on github
- offer commercial support for clients that want it
- read https://hintjens.gitbooks.io/social-architecture/content/
- learn to merge patches rapidly and with optimism :-)

People won't (in our experience) make dark forks when you welcome
their contributions.

-Pieter

On Wed, Jun 29, 2016 at 11:05 AM, Alex Bligh  wrote:
>
> On 29 Jun 2016, at 01:21, Andriy Drozdyuk  wrote:
>
>> Interesting. I'm not married to AGPL, just don't want companies hogging any 
>> patches they made.
>
> I'm not an Erlang user, but if I needed bindings for a language and
> I saw an AGPL licence, I'd write my own bindings and release them
> with a BSD licence - I'd do that whether I was writing something
> open source or commercial. LGPL might fly if all you're worried
> about is ensuring patches to the project get recycled.
>
> Alex
>
>>
>> On Tue, 28 Jun 2016 at 16:28 Pieter Hintjens  wrote:
>> This is really cool.
>>
>> The license choice will IMO hinder community growth around the project
>> so I'd advise to you have a backup plan to switch to MPLv2 if the
>> commercial uptake isn't sufficient.
>>
>> On Tue, Jun 28, 2016 at 7:09 PM, Andriy Drozdyuk  wrote:
>> > At Pieter's suggestion, I am putting this here:
>> > https://github.com/chovencorp/erlangzmq
>> >
>> > Native erlang 18 implementation of ZMTP 3.1 (including resource property),
>> > but without any security.
>> >
>> > Hopefully it will be useful to people. I know I'll use it myself - since 
>> > all
>> > (native) erlang bindings are out of date.
>> >
>> > This is a six month young project, so this is NOT performance or otherwise
>> > tested at all, and I would appreciate any feedback (just take a second to
>> > file an issue).
>> >
>> > Thank you,
>> > --Andriy Drozdyuk
>> >
>> > ___
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>> > zeromq-dev@lists.zeromq.org
>> > http://lists.zeromq.org/mailman/listinfo/zeromq-dev
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>
> --
> Alex Bligh
>
>
>
>
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