[zeromq-dev] Pub/sub, inproc shutdown Assert failure

[Victor Perron]

No more segfault for me with test_shutdown_stress, ubuntu 12.04 x86_64.

On Tue, Jun 12, 2012 at 8:24 PM, Martin Hurton <hurtonm at gmail.com> wrote:

> Marc, could you please try you application with the current master and
> report back?
> Thanks!
>
> - Martin
>
> On Sat, Jun 9, 2012 at 9:19 PM, Marc Criley <mcriley.1979 at gmail.com>
> wrote:
> > I'm getting:
> >
> > Assertion failed: ok (mailbox.cpp:79)
> >
> > when trying to shut down my application. After having searched the
> archives
> > and whitepapers I'm still at a loss. Here's the structure of what I have
> and
> > am trying to do (version 2.1.9-1, distributed with Ubuntu):
> >
> > - One main thread establishes a PUB socket using the 'inproc' transport.
> > - Four separate threads each open a SUB socket.
> > - 'inproc' requires the pub and sub sockets to use the same context, so
> that
> > is done.
> > - Each subscriber socket waits on 'recv()' for something to arrive,
> which is
> > then processed, and returns back to waiting for the next message.
> >
> > Everything runs fine in the application. However, at shutdown:
> >
> > - There is no pending traffic, it has all been cleared.
> > - The main thread closes its PUB socket.
> > - The main thread invokes zmq_term, which blocks.
> > - This unblocks the four subscriber threads waiting on recv().
> > - Each subscriber thread closes its socket and the thread terminates.
> >
> > At this point I expect the main thread call of zmq_term() to complete.
> > That's not what happens, instead I get:
> >
> > Assertion failed: ok (mailbox.cpp:79)
> >
> > I believe I did this in accordance with the 0MQ Termination whitepaper
> > (http://www.zeromq.org/whitepapers:0mq-termination), and this is the
> > sequence I use to shutdown a tcp transport client thread, which works
> > without problem.
> >
> > Deferring closing the PUB socket until after zmq_term doesn't work, as
> > zmq_term blocks until the socket is closed.
> >
> > Any suggestions would be appreciated.
> >
> > Marc C
> >
> >
> > _______________________________________________
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> > zeromq-dev at lists.zeromq.org
> > http://lists.zeromq.org/mailman/listinfo/zeromq-dev
> >
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-- 
Victor
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