就是所有查询数据库都不可用了 时好时坏 是为什么呀 . 然后有时候报错还不一样

配置文件
application.yml

#mybatis
mybatis:
  type-aliases-package: com.imooc.miaosha.domain #实体类
  configuration:
    map-underscore-to-camel-case: true #下划线转换成驼峰
    default-fetch-size: 100
    default-statement-timeout: 3000
  mapper-locations: classpath:/com/imooc/miaosha/dao/*.xml

#druid
spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    filters: stat
    tomcat:
      max-active: 1000
      initial-size: 100
      max-wait: 60000
      min-idle: 500
      time-between-eviction-runs-millis: 60000
      min-evictable-idle-time-millis: 200000
      validation-query: select 'x'
    url: jdbc:mysql:///miaosha?useUnicode=true&characterEncoding=utf-8&useSSL=true
    username: root
    password: Jie906119240!
    driver-class-name: com.mysql.cj.jdbc.Driver

applicaiton.xml

#redis
redis.host:127.0.0.1
redis.port:6379
redis.timeout:10
redis.portMaxTotal:1000
redis.poolMaxIdle:500
redis.poolMaxWait:500