ICode9

精准搜索请尝试: 精确搜索
首页 > 数据库> 文章详细

Java的报错解决: Cause: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure

2022-08-07 09:01:39  阅读:194  来源: 互联网

标签:cj jdbc false server SSL useSSL 报错 mysql


我们在学习mybatis中会出现Communications link failure报错,我当时找了一天都没有找到合适的解决方案

Sun Aug 07 08:30:43 CST 2022 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.

org.apache.ibatis.exceptions.PersistenceException: 
### Error updating database.  Cause: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
### The error may exist in mappers/userMapper.xml
### The error may involve com.example.mapper.userMapper.insertUser
### The error occurred while executing an update
### Cause: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure

下面是我的jdbc.properties中的内容

driver=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/ssm?serverTimezone=UTC
username=root
password=123456

解决方法:在url中添加useSSL=false,就可以解决,不知道你们的是否和我的一样,我的mysql是8版本的。

driver=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/ssm?useSSL=false&serverTimezone=UTC
username=root
password=123456

我感觉可能是下面这个代码的报错引起Communications link failure,在url中添加useSSL=false就是解决下面的报错的,如果你没有下面的报错,可能这个方法就不好使了

Sun Aug 07 08:30:43 CST 2022 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.

标签:cj,jdbc,false,server,SSL,useSSL,报错,mysql
来源: https://www.cnblogs.com/gaoqinghui/p/16558434.html

本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享;
2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关;
3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关;
4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除;
5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。

专注分享技术,共同学习,共同进步。侵权联系[81616952@qq.com]

Copyright (C)ICode9.com, All Rights Reserved.

ICode9版权所有