我正在使用带有Hibernate捆绑包的Drop向导。在让它运行几个小时/几天后，任何访问数据库的尝试都将导致

com.mysql.cj.exceptions.CJCommunicationsException: The last packet successfully received from the server was 33.304.281 milliseconds ago. Th
e last packet sent successfully to the server was 33.304.283 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should
 consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeout
s, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.

[...]
Causing: java.sql.SQLNonTransientConnectionException: No operations allowed after connection closed.

配置如下所示：

database:
  # the name of your JDBC driver
  driverClass: com.mysql.cj.jdbc.Driver

  # the username
  user: ...

  # the password
  password: ...

  # the JDBC URL
  url: jdbc:mysql://localhost/my_database

  # any properties specific to your JDBC driver:
  properties:
    charSet: utf8mb4
    hibernate.hbm2ddl.auto: update

  # the maximum amount of time to wait on an empty pool before throwing an exception
  maxWaitForConnection: 1s

  # the SQL query to run when validating a connection s liveness
  validationQuery: "/* MyService Health Check */ SELECT 1"

  # the timeout before a connection validation queries fail
  validationQueryTimeout: 3s

  # the minimum number of connections to keep open
  minSize: 8

  # the maximum number of connections to keep open
  maxSize: 32

  # whether or not idle connections should be validated
  checkConnectionWhileIdle: true

  checkConnectionOnBorrow: true

  # the amount of time to sleep between runs of the idle connection validation, abandoned cleaner and idle pool resizing
  evictionInterval: 10s

  # the minimum amount of time an connection must sit idle in the pool before it is eligible for eviction
  minIdleTime: 1 minute

  maxConnectionAge: 14400s

Hibernate包是从配置示例化的，就像在DW文档中一样：https://www.dropwizard.io/en/latest/manual/hibernate.html#configuration
数据库WAIT_TIMEOUT为28800秒。我不明白为什么连接不会因为老化(从错误消息建议的最后一个包开始的时间大于14400秒)或在验证后没有被删除，因为

checkConnectionOnBorrow: true

• 拖放向导版本：2.0.18
• MySQL-Connector-Java版本：8.0.23

我不知道该如何处理这件事，请帮帮忙。