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Exception during pool initialization.com.mysql.cj.jdbc.exceptions.CommunicationsException: Communic_- master - exception during pool initialization. c

- master - exception during pool initialization. com.mysql.cj.jdbc.exception

 解决方法:

在application.properties添加配置

  1. spring.datasource.druid.test-on-borrow=true
  2. spring.datasource.druid.test-while-idle=true

 

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