[zeromq-dev] zmq_msg_recv not blocking

[KIU Shueng Chuan]

Note that zmq_msg_recv() returns >= 0 on success.
On 23 Nov 2015 19:54, "Jeff Shanab" <jshanab at jfs-tech.com> wrote:

> I have used a previous version of zmq with google protocol buffers a few
> years ago but am trying a simpler project with the newest zmq and have run
> into a problem.
>
> Imagine the weather server and client converted to the multipart message
> code in the guide. But when I call zmq_msg_recv(&part, subscriber,0), it
> does not block!
>
> do {
>         /* Create an empty ØMQ message to hold the message part */
>         zmq_msg_t part;
>         int rc = zmq_msg_init (&part);
>         assert (rc == 0);
>         /* Block until a message is available to be received from socket */
>         rc = zmq_msg_recv (&part, subscriber,0);
>
>         if (rc != 0)
>         {
>             std::cout << "First msg Recv error :" << zmq_errno() <<
> zmq_strerror (zmq_errno()) << std::endl;
>
> boost::this_thread::sleep(boost::posix_time::milliseconds(250));
>             continue;
>         };
>
>         rc = zmq_getsockopt (subscriber, ZMQ_RCVMORE, &more, &more_size);
>         assert (rc == 0);
>
>         ....
>
> With this code, I get
>
> First msg Recv error :35Resource temporarily unavailable
> First msg Recv error :60Operation timed out
> First msg Recv error :60Operation timed out
> First msg Recv error :60Operation timed out
> First msg Recv error :60Operation timed out
> First msg Recv error :60Operation timed out
> First msg Recv error :60Operation timed out
> First msg Recv error :60Operation timed out
> First msg Recv error :60Operation timed out
> First msg Recv error :60Operation timed out
> First msg Recv error :60Operation timed out
> First msg Recv error :60Operation timed out
> First msg Recv error :60Operation timed out
> First msg Recv error :60Operation timed out
> First msg Recv error :60Operation timed out
> First msg Recv error :60Operation timed o ...
>
> This is on OSX. I am going to try windows and linux after work tonight.
>
> Are there any known issues with 4.1.3, zmq_msg_recv and OSX ?
>
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>
>
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