Have bosses come across this problem, in the use of event_base evconnlistener server, client normal connection, normally open, the server end in event_cb get error in the callback function directly for erron err_msg==11 Resource temporarily unavailable error, linking the read and write operations did not do after just set the heartbeat detection interval to 1 second, if there is any big met, how to get rid of this error, although the program does not have too big impact, but to see the error is very afflictive, ask for help