On Nov 17, 2011, at 11:31 AM, Emmanuel Taurel wrote: > Hello all, > > I am using Zmq 3.0 on a Linux box. > I am using the PUB/SUB framework. > My messages are multi part messages with 4 parts. > In my test system, the message is sent on a human action (a mouse click) > > I notice that from "time to time", I am loosing the first part of the > multi part message. Wireshark confirm this. When this happens, it is > always the first message exchanged from the publisher to the > subscriber. Following messages works fine. > > I have added some tracing info and tried to do some debugging. > I see the method zmq::pipe_t::write() called 4 times which I guess are due > to the four part of the multi part message > I see the execution of the encoder::get_data() message which I guess > retrieve data from the queue and send then to the BSD socket. > When I am loosing the first part of the message, this get_data() > method extract only three chunk of data. Each chunk is 2 bytes for ZMQ > protocol (I guess) plus the message part data. > If I compare with correct transmission of the multi-part message, it > should extract 4 chunks of data instead of 3. > > Therefore, I guess that the first message part is lost somewhere > between this write() method of the pipe class and this > encoder::get_data() method. > > What do you think?
I'm pretty sure this is a known issue. See: https://zeromq.jira.com/browse/LIBZMQ-248 and https://zeromq.jira.com/browse/LIBZMQ-270 _______________________________________________ zeromq-dev mailing list [email protected] http://lists.zeromq.org/mailman/listinfo/zeromq-dev
