项目上传服务器后过一段时间访问就出错

第一天是好的，到了第二天访问和数据库相关的网页就报错org.hibernate.exception.JDBCConnectionException: could not execute query
java.sql.SQLException: No operations allowed after connection closed.Connection was implicitly closed due to underlying exception/error:
java.net.SocketException: Software caused connection abort: socket write errorjavax.servlet.ServletException: org.hibernate.exception.JDBCConnectionException: could not execute query
org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:535)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:433)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)