add Warn log in writePongMsg.

internal/msggateway/client.go

@@ -393,6 +393,7 @@ func (c *Client) writePingMsg() error {
 func (c *Client) writePongMsg(appData string) error {
 	log.ZDebug(c.ctx, "write Pong Msg in Server", "appData", appData)
 	if c.closed.Load() {
+		log.ZWarn(c.ctx, "is closed in server", nil, "appdata", appData)
 		return nil
 	}
 
@@ -403,6 +404,7 @@ func (c *Client) writePongMsg(appData string) error {
 	log.ZDebug(c.ctx, "write Pong Msg in Server", "appData", appData)
 	err := c.conn.SetWriteDeadline(writeWait)
 	if err != nil {
+		log.ZWarn(c.ctx, "SetWriteDeadline in Server have error", errs.Wrap(err), "writeWait", writeWait, "appData", appData)
 		return errs.Wrap(err)
 	}
 	err = c.conn.WriteMessage(PongMessage, []byte(appData))