不能删除，更改或更新表，以等待表元数据锁定mysql

Question

我正在尝试使用drop table <tablename>删除数据库中的一个表，但是它无法正常工作，而是进入等待状态，并在show processlist上给出了此输出结果

mysql> show processlist;
    +---------+------+-----------+-----------------+------------+------+---------------------------------+--------------------------------------------------+
    | Id      | User | Host      | db              | Command    | Time | State                           | Info                                             |
    +---------+------+-----------+-----------------+------------+------+---------------------------------+--------------------------------------------------+
    | 4076315 | root | localhost | mydb | Query      | 4467 | Opening tables                  | SHOW SESSION VARIABLES LIKE 'FOREIGN_KEY_CHECKS' |
    | 4076519 | root | localhost | mydb | Field List | 4240 | Waiting for table flush         |                                                  |
    | 4076538 | root | localhost | mydb | Field List | 4185 | Waiting for table flush         |                                                  |
    | 4076579 | root | localhost | mydb | Field List | 4154 | Waiting for table flush         |                                                  |
    | 4079111 | root | localhost | mydb | Query      |  497 | Waiting for table metadata lock | drop table cc_dropbox_mapping                    |
    | 4079706 | root | localhost | mydb | Query      |    0 | starting                        | show processlist                                 |
    +---------+------+-----------+-----------------+------------+------+---------------------------------+--------------------------------------------------+
    6 rows in set (0.00 sec)