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POSimple ZeroMQ Perl (AnyEvent) HelloWorld program hangs after two loop iterations
 

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    <p>I slightly modified the helloworld server program (<a href="https://github.com/imatix/zguide/blob/master/examples/Perl/hwserver.pl" rel="nofollow">hwserver.pl</a>) from the ZeroMQ guide, to implement it with AnyEvent. Yet after two iterations of REQ/REP, the program hangs. Can someone figure out why?</p> <p>Here's the server:</p> <pre class="lang-perl prettyprint-override"><code>#!/usr/bin/perl -w use strict; use warnings; use 5.12.0; use EV; use AnyEvent; use ZMQ::LibZMQ3; use ZMQ::Constants qw/ ZMQ_REP ZMQ_FD /; my $context = zmq_init(); my $responder = zmq_socket($context, ZMQ_REP); my $fh = zmq_getsockopt( $responder, ZMQ_FD ); zmq_bind($responder, 'tcp://*:5555'); our $w; $w = AE::io $fh, 0, sub { say "Receiving..."; zmq_recv($responder, my $buf, 1_000_000); say "Received request: [$buf]"; sleep(1); zmq_msg_send('World', $responder); sleep(1); }; EV::run; </code></pre> <p>And here's the client:</p> <pre><code>#!/usr/bin/perl -w use strict; use warnings; use 5.12.0; use ZMQ::LibZMQ3; use ZMQ::Constants qw(ZMQ_REQ); my $context = zmq_init(); # Socket to talk to server say 'Connecting to hello world server...'; my $requester = zmq_socket($context, ZMQ_REQ); zmq_connect($requester, 'tcp://localhost:5555'); for my $request_nbr (0..9) { say "Sending request $request_nbr..."; zmq_msg_send('Hello', $requester); my $msg = zmq_msg_init(); say "Receiving..."; zmq_msg_recv($msg, $requester); say "Received reply $request_nbr: [". zmq_msg_data($msg) ."]"; } </code></pre> <p>And here's the output of the server:</p> <pre><code>Receiving... Received request: [Hello] Receiving... Received request: [Hello] </code></pre> <p>And here's the output of the client:</p> <pre><code>Connecting to hello world server... Sending request 0... Receiving... Received reply 0: [World] Sending request 1... Receiving... Received reply 1: [World] Sending request 2... Receiving... </code></pre> <p>What's wrong?</p>
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