A strange problems, the client connection service side, often appear when the client to establish a TCP connection, for the first time sent the syn packet of shaking hands, caught by the server received the syn, immediately return to the syn + ack, but the client didn't receive the syn + ack, behind the client sent the syn twice, the service side also has two retransmission syn, each connection exception, caught see is the result, don't know what reason is caused,
Client and the server is a dedicated connection, it felt like the server to send the syn + ack, special line transmission was lost, but why every time is such,