大致报错日志如下：
The last packet successfully received from the server was 11 milliseconds ago. The last packet sent successfully to the server was 10 milliseconds ago.at sun.reflect.GeneratedConstructorAccessor275.newInstance(Unknown Source)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)at java.lang.reflect.Constructor.newInstance(Unknown Source)at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:989)at com.mysql.jdbc.ExportControlled.transformSocketToSSLSocket(ExportControlled.java:203)at com.mysql.jdbc.MysqlIO.negotiateSSLConnection(MysqlIO.java:4901)at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1659)at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1226)at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2191)at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2222)at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2017)at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:779)at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)at sun.reflect.GeneratedConstructorAccessor147.newInstance(Unknown Source)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)at java.lang.reflect.Constructor.newInstance(Unknown Source)at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:389)at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)... 62 more
Caused by: javax.net.ssl.SSLException: Received fatal alert: internal_errorat sun.security.ssl.Alerts.getSSLException(Unknown Source)at sun.security.ssl.Alerts.getSSLException(Unknown Source)at sun.security.ssl.SSLSocketImpl.recvAlert(Unknown Source)at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)at com.mysql.jdbc.ExportControlled.transformSocketToSSLSocket...原因：
看了各类博客说，Mysql在5.7.43版本加大了对隐私的保护。默认 useSSL = true值防止对数据库的随意修改。
解决方案：
1、jdbc连接后面加useSSL=false （未成功）
2、关闭mysql的SSL（成功解决）
在MySQL配置文件（/etc/my.conf）中添加disable_ssl和skip_ssl参数，如下：
重启mysql服务
测试正常，坑已填平！！！
参考文章：
https://blog.csdn.net/guoheng_123/article/details/132358920文章浏览阅读2.4k次。前几天为了修复MySQL数据库漏洞，项目上从5.7.41版本升级到了5.7.43，今天在使用kettle时发现数据库突然连不上了，测试连接报如下错误： Error connecting to database: (using class org.gjt.mm.mysql.Driver)Communications link failureThe last packet successfully received from the server was 11 milliseconds ago_caused by: javax.net.ssl.sslexception: received fatal alert: internal_errorhttps://blog.csdn.net/guoheng_123/article/details/132358920
MYSQL关闭SSL的方法分享_mysql关闭ssl连接认证-CSDN博客文章浏览阅读2.4k次，点赞2次，收藏5次。以上为个人经验，希望能给大家一个参考，也希望对你有所帮助。微点阅读。_mysql关闭ssl连接认证https://blog.csdn.net/hdxx2022/article/details/131900725
