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.
时间: 2024-04-22 17:25:50 浏览: 297
这个错误通常是因为与数据库的连接出现了问题。有几个可能的原因导致这个问题:
1. 数据库连接配置错误:请确保你的数据库连接配置正确,包括数据库地址、端口号、用户名和密码等。
2. 数据库服务未启动:请确保你的数据库服务已经启动,并且可以正常访问。
3. 数据库连接超时:如果你的数据库连接超时时间设置得过短,可能会导致连接失败。你可以尝试增加连接超时时间。
4. 网络问题:如果你的网络连接存在问题,可能会导致与数据库的通信失败。请确保你的网络连接正常。
你可以根据以上几点进行排查,看看是否能够解决这个问题。如果还有其他疑问,请提供更多的详细信息,我会尽力帮助你解决。
相关问题
org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
这个错误通常发生在使用MyBatis连接数据库时,它表示MyBatis无法连接到数据库。这可能是由于网络连接问题、数据库配置错误或数据库服务未启动等原因导致的。
您可以尝试检查您的数据库连接配置是否正确,并确保数据库服务正在运行。您还可以尝试检查您的网络连接是否正常,例如防火墙设置是否允许数据库连接。如果问题仍然存在,您可以尝试使用不同的数据库连接库或与MyBatis社区联系以获得更多帮助。
org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
这个错误提示信息意味着你的应用程序在尝试连接MySQL数据库时出现了问题。具体来说,应用程序试图获取JDBC连接时失败了,可能是由于网络连接问题或MySQL数据库配置问题导致的。
一种可能的解决方法是检查MySQL数据库的配置,确保数据库已经启动并且已经正确配置。另外,你也可以尝试检查网络连接是否正常,以确保应用程序可以访问MySQL数据库。如果这些方法都无法解决问题,你可能需要更多的上下文信息来确定问题的原因。
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