[zeromq-dev] Subtle zmq_poll bug #1

[Jianhua Cao]

Martin,

Any plan to fix the dropped messages for the P2P socket mentioned in
one early post?

http://gist.github.com/309551

Jianhua


On Mon, Mar 15, 2010 at 9:00 AM, Martin Sustrik <sustrik at 250bpm.com> wrote:
> Brian,
>
>> I am beginning to go through the process of testing zmq_poll in various ways...
>>
>> When I run:
>>
>> http://gist.github.com/332237
>>
>> I get:
>>
>> $ python p2p.py
>> Traceback (most recent call last):
>>   File "p2p.py", line 23, in <module>
>>     assert socks[s1] == zmq.POLLOUT
>> AssertionError
>> Bad file descriptor
>> rc != -1 (kqueue.cpp:79)
>>
>> There are two issues here:
>>
>> 1. This P2P socket (it is a bound socket) does not come up in the
>> POLLOUT state.  The other socket (the one that connects) does come up
>> in the POLLOUT state.
>
> Yes. P2P is not completely polished yet. On the binding side of the
> connection the availability for writing is not immediate. I'll try to
> fix it asap, however, I am not sure whether it get into this week's
> release (2.0-beta3).
>
>> 2. The additional "Bad file descriptor" shows up only some of the time.
>
> This one - or a very similar one - was already reported on QNX by Armin
> Steinhoff. Isn't there accidentally a tool similar to strace on OSX? If
> so, can you strace the problem? (Unfortunately, no OSX here.)
>
> Martin
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-- 
Jianhua