[zeromq-dev] PUB/SUB unreliabiliity

[Gerry Steele]

In the patent email I have links to the minimal examples on gist.github.com

Happy to open an issue and commit them later on if that's what you need.

Thanks
On 16 Jun 2014 14:43, "Pieter Hintjens" <ph at imatix.com> wrote:

> Gerry, can you provide a minimal test case that shows the behavior? Thanks.
>
> On Mon, Jun 16, 2014 at 12:49 PM, Gerry Steele <gerry.steele at gmail.com>
> wrote:
> > Thanks Peter. I can't try this out till I get home but it is looking like
> > hwm overflows.
> >
> > If you run the utilities you notice the drops start happening after
> > precisely 1000 events in the first instance (which Is the default hwm).
> >
> > There was another largely ignored thread about this recently mentioning
> the
> > same problem.
> >
> > I also tried setting the hwm values to a number greater than the number
> of
> > events and it seemed to have no effect either.
> >
> > g
> >
> > On 16 Jun 2014 09:32, "Pieter Hintjens" <ph at imatix.com> wrote:
> >>
> >> On Mon, Jun 16, 2014 at 9:10 AM, Gerry Steele <gerry.steele at gmail.com>
> >> wrote:
> >>
> >> > Big chunks of messages go missing mid flow and then pick up again.
> There
> >> > is
> >> > no literature that indicates that is expected behaviour.
> >>
> >> Right. The two plausible causes for this are (a) HWM overflows, and
> >> (b) temporary network disconnects. You have excluded (a), though to be
> >> paranoid I'd probably add some temporary logging to libzmq's pub
> >> socket to shout out if/when it does hit the HWM. To detect (b) you
> >> could use the socket monitoring.  The third possibility is that you're
> >> doing something wrong with subscriptions... though that seems
> >> unlikely.
> >>
> >> -Pieter
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> >
> >
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