问题：
spring boot + hikari + mysql
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Caused by: com.mysql.cj.exceptions.ConnectionIsClosedException: No operations allowed after connection closed. |
解决：
可能管用
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spring: datasource: hikari: maxLifetime: 600000 idleTimeout: 120000 minimumIdle: 1 maximumPoolSize: 3 keepaliveTime: 120000 |
参考：