com.mchange.v2.resourcepool.TimeoutException: A client timed out while waiting to acquire a resource

异常信息：

com.mchange.v2.resourcepool.TimeoutException: A client timed out while waiting to acquire a resource from com.mchange.v2.resourcepool.BasicResourcePool@b8db8eb -- timeout at awaitAvailable()

原因：获取不到数据库连接——>数据库用户被锁定——>登录用户密码错误（多次尝试登录）——>查看数据库配置