錯誤信息:

org.springframework.dao.RecoverableDataAccessException: ### Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 122,465 milliseconds ago. The last packet sent successfully to the server was 0 milliseconds ago. ### The error may exist in file [/home/app/sanqiwebsite/webapps/website/WEB-INF/classes/sqlmap/ArticleDao.xml] ### The error may involve cn.wenpu.web.bookstore.mapper.ArticleDao.getArticleById-Inline ### The error occurred while setting parameters ### SQL: select * from article where articleId=? ### Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 122,465 milliseconds ago. The last packet sent successfully to the server was 0 milliseconds ago. ; SQL []; Communications link failure The last packet successfully received from the server was 122,465 milliseconds ago. The last packet sent successfully to the server was 0 milliseconds ago.; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 122,465 milliseconds ago. The last packet sent successfully to the server was 0 milliseconds ago.

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