[zeromq-dev] Test test_pair_tcp.cpp hangs at bounce()

Luca Boccassi luca.boccassi at gmail.com
Wed Feb 28 21:08:54 CET 2018

On Wed, 2018-02-28 at 11:40 -0800, Manuel Segura wrote:
> Hello,
> I'm porting libzmq to VxWorks and the test_pair_tcp.cpp test hangs
> inside
> the bounce() function call, specifically the first zmq_recv() call.
> I've
> traced this to zmq_recv() => s_recvmsg() => s_->recv() =>
> process_commands()
> => mailbox->recv() => signaler.wait() => select(). It seems xrecv()
> fails
> and it goes into a blocking wait.
> What would be some reasons that this would hang?
> Thank you,
> Manuel


Do other tests fail? Or only that one?

You can try and add socket monitors to check that the handshake


Alternatively, given it's a tcp test, you can use wireshark/tshark with
the zmtp dissector to snoop on the wire:


Kind regards,
Luca Boccassi
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