Lock wait timeout exceeded; try restarting transaction

锁等待超时，尝试重启事务

Mysql数据库采用InnoDB模式，默认参数:innodb_lock_wait_timeout设置锁等待的时间是50s，一旦数据库锁超过这个时间就会报错

 

https://blog.csdn.net/java__project/article/details/100137526