[zeromq-dev] Signaler.cpp hangs on windows intermittently

[Pieter Hintjens]

Martin,

I think evreryone liked the idea of ephemeral ports, but it needs
someone who can reproduce the problem to make the change and pull
request. Any volunteers?

-Pieter

On Thu, May 9, 2013 at 4:52 AM, Martin Robinson
<martin.robinson at dai.co.uk> wrote:
> Pieter,
>
> If making changes to this area of signaller.cpp, you might also review the change I suggested back on 22nd March to make this use ephemeral ports instead of a fixed port number.  Seems to solve the problem completely of the connect failing on XP in signaler_t::make_fdpair.
>
> Martin
>
> -----Original Message-----
> From: zeromq-dev-bounces at lists.zeromq.org [mailto:zeromq-dev-bounces at lists.zeromq.org] On Behalf Of Pieter Hintjens
> Sent: 06 May 2013 20:55
> To: ZeroMQ development list
> Subject: Re: [zeromq-dev] Signaler.cpp hangs on windows intermittently
>
> Has this been fixed on master but not backported to 3.x?
>
> Usually it's up to individual contributors to either do the backport (a git cherrypick) or ask someone to help do it.
>
> I'm happy to backport the fix for the next 3.2.4 release if someone tells me what commit it was.
>
> -Pieter
>
> On Mon, May 6, 2013 at 8:32 PM, Felipe Farinon <felipe.farinon at powersyslab.com> wrote:
>> Why wasn't this patch released yet?
>>
>> In my application i'm trying to fix it by using Mutex considering the
>> case that waiting (WaitForSingleObject) on the mutex results in
>> WAIT_ABANDONED. It seems that it has been fixed. Should I submit a patch?
>>
>> Em 19/03/2013 16:45, Pau escreveu:
>>> Hi,
>>>
>>> I had this problem some weeks ago. This was my problem:
>>>
>>> I do not know all possible reasons to generate a fatal wsa_assert(..)
>>> but there is at least one:
>>>
>>> I have seen that in XP it is possible that line 301  rc = connect
>>> (*w_, (sockaddr *) &addr, sizeof (addr)); returns an error when a
>>> socket tries to connect to 5905 and this has happened many times.
>>> Windows uses port numbers starting near 1400 and XP has a limit at 5000.
>>> In W7 this does not look as a problem because maximum is 65000 It
>>> sounds as if the number was big enough but apart from the fact that
>>> ZMQ uses a big number of connections (at least in my tests) I have
>>> experienced that Windows jumps port numbers by 7, so 5000 happens
>>> sometimes with catastrophic consequences.
>>>
>>> Perhaps there are other reasons (actually this problem does not
>>> happen like that in W7) anyway whatever crashes between
>>>
>>> HANDLE sync = CreateEvent (NULL, FALSE, TRUE, TEXT
>>> ("zmq-signaler-port-sync")); and SetEvent (sync);
>>>
>>> will leave the event signaled and any other application in the system
>>> will hang. Closing all apps in a system fixes it.
>>>
>>> KIU Shueng Chuan submitted a patch that sets the event when crash
>>> avoiding other applications to ge hanged:
>>>
>>> https://github.com/zeromq/libzmq/pull/514
>>>
>>> That worked for me...
>>>
>>> If you search for "zmq-signaler-port-sync" in previous mails in this
>>> list you will see the complete thread.
>>>
>>> best,
>>>
>>> Pau
>>>
>>> El 19/03/2013 17:18, Felipe Farinon escribió:
>>>> Hi,
>>>>
>>>> The code
>>>> HANDLE sync = CreateEvent (&sa, FALSE, TRUE, TEXT
>>>> ("Global\\zmq-signaler-port-sync"));
>>>>
>>>> in signaler.cpp:262 hangs intermittently when starting zeromq
>>>> context through zmq_init in my application. I'm not able to
>>>> reproduce this bug with a minimal test case. I'm running my
>>>> application in a Windows 7 with zeromq compiled with VS2010.
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>>
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