web application crashes

From: Jean-Paul Le Fèvre (lefevr..ep.saclay.cea.fr)
Date: Fri Jun 13 2003 - 04:40:29 EDT

  • Next message: Andrus Adamchik: "Re: web application crashes"

    Every night my Tomcat server falls asleep since it does not
    receive any request for my web app. This application is based
    on Cayenne and MySQL.
    In the morning at my first attempt to get a connection
    the application crashes. The stack trace shows :

    2003-06-13 10:11:14 login: Exception when processing request login
    org.objectstyle.cayenne.CayenneRuntimeException: [v.1.0b3 May 25 2003] Global ex
    ception.
            at org.objectstyle.cayenne.access.util.SelectObserver.nextGlobalExceptio
    n(SelectObserver.java:155)

    ..............

            at org.objectstyle.cayenne.access.DataNode.performQueries(DataNode.java:
            at hep.xmm.l3sdb.server.L3sdbServlet.selectUser(L3sdbServlet.java:321)
            at hep.xmm.l3sdb.server.LoginServlet.handleLogin(LoginServlet.java:119)
            at hep.xmm.l3sdb.server.LoginServlet.handleRequest(LoginServlet.java:49)
            at hep.xmm.l3sdb.server.L3sdbServlet.doPost(L3sdbServlet.java:87)
            at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)

    .................

    Caused by: java.sql.SQLException: Communication link failure: java.io.IOExceptio
    n
            at com.mysql.jdbc.MysqlIO.sendCommand(Unknown Source)
            at com.mysql.jdbc.MysqlIO.sqlQueryDirect(Unknown Source)
            at com.mysql.jdbc.Connection.execSQL(Unknown Source)
            at com.mysql.jdbc.PreparedStatement.executeQuery(Unknown Source)
            at org.objectstyle.cayenne.access.DataNode.runSelect(DataNode.java:375)
     
    Do you have any idea about why the server cannot be awaken correctly ? 

    -- 
______________________________________________

    Jean-Paul Le Fèvre - Jean-Paul.LeFevr..ea.fr

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