Igor,
I run your code (Win7, MSVC10, boost 1.44), and I can't reproduce the issue you describe, the output is always: b sent 2000 messages a received 2000 messages
I gave it a shot using boost 1.44, freshly downloaded & compiled, but I get the same results. the pattern is the same: up until a certain number of packets, everything is received. but there's an obvious breaking point, after which only a few packets will be received, maybe less than five. one way I could make it send / receive all the packets was to add a millisecond of sleep after each send: for (unsigned int i = 0; i < 2000; ++i) { std::stringstream sstr; sstr << i; b.send(endp_a, sstr.str()); boost::this_thread::yield(); boost::this_thread::sleep(boost::posix_time::milliseconds(1)); } this indicates the problem to be a threading issue. but wouldn't a yield() be enough? putting in a 1ms sleep every 100 sends also works most of the time: for (unsigned int i = 0; i < 2000; ++i) { std::stringstream sstr; sstr << i; b.send(endp_a, sstr.str()); if (i % 100 == 0) { boost::this_thread::yield(); boost::this_thread::sleep(boost::posix_time::milliseconds(1)); } } but putting the 1ms sleep in every 1000 sends will break things again. the results seem to be the same with boost 1.40 and 1.44.
Anyway, if I read your code correctly, you assume that all these messages should be sent/received within 1 second, don't you? What if you increase this value?
giving 1 seconds or 5 seconds gives the same result. Akos