only set a read deadline when the keep-alive value is positive (#83)

broker/client.go

@@ -121,14 +121,16 @@ func (c *client) readLoop() {
 			return
 		default:
 			//add read timeout
-			if err := nc.SetReadDeadline(time.Now().Add(timeOut)); err != nil {
-				log.Error("set read timeout error: ", zap.Error(err), zap.String("ClientID", c.info.clientID))
-				msg := &Message{
-					client: c,
-					packet: DisconnectdPacket,
+			if keepAlive > 0 {
+				if err := nc.SetReadDeadline(time.Now().Add(timeOut)); err != nil {
+					log.Error("set read timeout error: ", zap.Error(err), zap.String("ClientID", c.info.clientID))
+					msg := &Message{
+						client: c,
+						packet: DisconnectdPacket,
+					}
+					b.SubmitWork(c.info.clientID, msg)
+					return
 				}
-				b.SubmitWork(c.info.clientID, msg)
-				return
 			}
 
 			packet, err := packets.ReadPacket(nc)