[zeromq-dev] test_proxy hanging occasionally

[Pieter Hintjens]

I suspect the two issues are unrelated.

On Mon, Jul 20, 2015 at 9:01 PM, Brian Silverman <brian at peloton-tech.com> wrote:
> I'm pretty sure I found the problem: the sockets in the test had ZMQ_LINGER
> set to the default (-1, aka forever). Setting them all to 0 seems to have
> fixed the hanging problem. It ran 100,000 times over the weekend without
> hanging. I had come across that potential solution before sending the email,
> but realized just after asking for help that I missed setting the option on
> some of the sockets...
>
> However, with the ZMQ_LINGER fix I did get an assertion failure in lb.cpp at
> the "zmq_assert (!more);" line. I'm not sure if that's related or not. That
> happened in 1 out of the 100,000 runs. Working on chasing that down a bit
> more now.
>
> What's the appropriate path forwards here? Should I send a github pull
> request for setting ZMQ_LINGER, or does it make more sense to figure out the
> assertion failure first, or something else?
>
> Thanks,
> Brian
>
> On Sat, Jul 18, 2015 at 2:05 AM, Pieter Hintjens <ph at imatix.com> wrote:
>>
>> It could be timing dependent. To track this down the first thing would
>> be to run the test in isolation, and see if you can get it to fail.
>> Then, to change the timers (I see it waits for 200msec between
>> messages) to see if that makes it fail more often.
>>
>> In any case we need to find out where it's hanging...
>>
>> -Pieter
>>
>> On Sat, Jul 18, 2015 at 3:16 AM, Brian Silverman <brian at peloton-tech.com>
>> wrote:
>> > Hi,
>> >
>> > I'm seeing test_proxy hanging occasionally (on the order of 1 in 100,000
>> > runs). It never returns a non-zero exit code though. I'm doing this on
>> > Debian Jessie with the default 3.16.0-4-amd64 kernel. I'm using commit
>> > 2e5435e38f91a33ed2f9b78c046a3e7b488a453f. Any ideas?
>> >
>> > Thanks,
>> > Brian Silverman
>> >
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