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1. when we call zmq_bind()/zmq_connect() to create endpoint we send ourselfs(through launch_child()) command to process_own(endpoint) (and add it to own_t::owned) in the application thread we could call zmq_unbind() / zmq_disconnect() _BEFORE_ we run process_own() in ZMQ thread and in this situation we will be unable to find it in own_t::owned. in other words own_t::owned.find(endpoint) will not be deleted but it will be deleted from socket_base_t::endpoints. 2. when you zmq_unbind() the lisnening TCP/IPC socket was terminated only in destructor... so the whole ZMQ_LINGER time listening TCP/IPC socket was able to accept() new connections but unable to handle them. this all geting even worse since unfortunately zmq has a bug and '*_listener_t' object not terminated untill the socket's zmq_close(). AT LEAST FOR PUSH SOCKETS. Everything is ok for SUB sockets. Easy to reproduce without my fix: zmq_socket(PUSH) zmq_bind(tcp); // connect to it from PULL socket zmq_unbind(tcp); sleep(forever) // netstat -anp | grep 'tcp listening socket' With my fix you could see that after zmq_unbind(tcp) all previously connected tcp sessions will not be finished untill the zmq_close(socket) regardless of ZMQ_LINGER value. (*_listener_t terminates all owned session_base_t(connect=false) and they call pipe_t::terminate() which in turn should call session_base_t::terminated() but this never happens) |
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Welcome ------- The 0MQ lightweight messaging kernel is a library which extends the standard socket interfaces with features traditionally provided by specialised messaging middleware products. 0MQ sockets provide an abstraction of asynchronous message queues, multiple messaging patterns, message filtering (subscriptions), seamless access to multiple transport protocols and more. Building and installation ------------------------- See the INSTALL file included with the distribution. Resources --------- Extensive documentation is provided with the distribution. Refer to doc/zmq.html, or "man zmq" after you have installed 0MQ on your system. Website: http://www.zeromq.org/ Development mailing list: zeromq-dev@lists.zeromq.org Announcements mailing list: zeromq-announce@lists.zeromq.org Git repository: http://github.com/zeromq/libzmq 0MQ developers can also be found on the IRC channel #zeromq, on the Freenode network (irc.freenode.net). Copying ------- Free use of this software is granted under the terms of the GNU Lesser General Public License (LGPL). For details see the files `COPYING` and `COPYING.LESSER` included with the 0MQ distribution.