Optimize the logic to avoid the possible issue.

fujuntang

2021-11-19 4f8e1e58427147b7a9a784639e2170d34c5d3221

 test_socket/heart_beat.sh

@@ -50,6 +50,16 @@
  close
  ;;

  "test2")
  start_server
   sleep 1
   start_clients
   sleep 5
   kill -15 server_pid
   sleep 2 
   close_clients
  ;;

  "")
   start_server
   sleep 1