MySQL root@127.0.0.1:test> select 1;
+---+
| 1 |
+---+
| 1 |
+---+
1 row in set
Time: 0.019s
MySQL root@127.0.0.1:test> select 1; -- the mysql server stopped
Reconnecting...
(2003, "Can't connect to MySQL server on '127.0.0.1' ([Errno 61] Connection refused)")
MySQL root@127.0.0.1:test> select 1; -- the mysql server started, but throw exception: (0, '')
(0, '')

MySQL root@127.0.0.1:test> select 1;
+---+
| 1 |
+---+
| 1 |
+---+
1 row in set
Time: 0.012s
MySQL root@127.0.0.1:test> select 1; -- the mysql server stopped
Reconnecting...
(2003, "Can't connect to MySQL server on '127.0.0.1' ([Errno 61] Connection refused)")
MySQL root@127.0.0.1:test> select 1; -- the mysql server started and can reconnect
Reconnecting...
+---+
| 1 |
+---+
| 1 |
+---+
1 row in set
Time: 0.006s