如果是数据库系统,可能就是这个协议的原因,可以再数据库连接的url后面拼接这个&useSSL=false
Sun Oct 31 19:35:47 CST 2021 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
Sun Oct 31 21:00:00 CST 2021 WARN: Caught while disconnecting...
参考文档
https://blog.csdn.net/qq_41785135/article/details/85118329
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