報錯信息
2017-03-12 03:00:02.539 ERROR 9311 --- [nio-9000-exec-4] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.RecoverableDataAccessException: StatementCallback; SQL [DELETE FROM search_product]; The last packet sent successfully to the server was 86,395,487 milliseconds ago. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.] with root cause
經查發現原來是mysql默認會將8個小時內沒有操作過的數據庫連接斷開。
項目是springboot。
找到一個解決辦法，在application.properties中設置datasource的時候，加入如下設置：
(testWhileIdle,validationQuery,timeBetweenEvictionRunsMillis)
#設置每隔一小時向mysql進行一次連接可用確認 srping.dataSource.bySearch.testWhileIdle = true spring.dataSource.bySearch.validationQuery=SELECT 1 spring.dataSource.bySearch.timeBetweenEvictionRunsMillis = 3600000
文章轉載至：https://blog.csdn.net/u012859681/article/details/62051509?utm_source=blogxgwz5