mybatis连接报错:the last packet sent successfully to the server was 10008 milliseconds ago,如何在application.yml调整参数?

时间: 2023-09-21 22:03:21 浏览: 47
在 application.yml 中,可以通过以下参数来调整 MyBatis 的连接配置: ``` mybatis: configuration: default-fetch-size: 100 default-statement-timeout: 30 mapper-locations: classpath:mapper/*.xml type-aliases-package: com.example.model type-handlers-package: com.example.typehandler configuration-properties: jdbc.fetchSize: 100 jdbc.timeout: 30 jdbc.driver: com.mysql.jdbc.Driver jdbc.url: jdbc:mysql://localhost:3306/mybatis jdbc.username: root jdbc.password: root ``` 其中,`jdbc.fetchSize` 和 `jdbc.timeout` 分别对应了 MyBatis 中的 `fetchSize` 和 `timeout` 参数。你可以根据需要调整这些参数的值。例如,将 `jdbc.timeout` 的值改为 60 秒: ``` jdbc.timeout: 60 ``` 注意,这里的单位是秒。另外,如果你正在使用 Spring Boot,也可以将这些参数通过 `application.properties` 文件来配置。

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springboot+MyBatis连接MySql数据库遇到问题:### Error querying database. Cause: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure The last packet successfully received from the server was 11,751 milliseconds ago. The last packet sent successfully to the server was 11,858 milliseconds ago. ### The error may exist in file [/app/tomcat/webapps/project/WEB-INF/classes/mapper/PersonWeekMapper.xml] ### The error may involve com.xmsme.mapper.PersonWeekMapper.selectPersonWeekList-Inline ### The error occurred while setting parameters ### SQL: SELECT count(0) FROM (SELECT WEEK.id, WEEK.sub_time, WEEK.need_thing, WEEK.plan_content, WEEK.target_content, WEEK.sub_time AS update_time, WEEK.create_time, WEEK.week_start, WEEK.user_id, WEEK.week_end, readInfo.id AS readId, readInfo.read_status AS readStatus, updateor.nick_name FROM t_person_weekly AS WEEK LEFT JOIN sys_user sUser ON sUser.user_id = WEEK.user_id LEFT JOIN t_read_info readInfo ON readInfo.business_id = WEEK.id AND readInfo.read_type = 'PER' LEFT JOIN sys_user updateor ON updateor.user_id = WEEK.update_by LEFT JOIN sys_user_role uRole ON uRole.user_id = WEEK.update_by LEFT JOIN sys_user_post uPost ON uPost.user_id = WEEK.user_id LEFT JOIN t_project_person person ON person.user_id = WEEK.user_id LEFT JOIN t_project_person Pperson ON Pperson.project_id = person.project_id WHERE 1 = 1 AND WEEK.is_del = 0 AND WEEK.draft = 'N' AND Pperson.user_id = ? GROUP BY WEEK.id) table_count ### Cause: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure The last packet successfully received from the server was 11,751 milliseconds ago. The last packet sent successfully to the server was 11,858 milliseconds ago. ; Communications link failure The last packet successfully received from the server was 11,751 milliseconds ago. The last packet sent successfully to the server was 11,858 milliseconds ago.; nested exception is com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure The last packet successfully received from the server was 11,751 milliseconds ago. The last packet sent successfully to the server was 11,858 milliseconds ago.

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