no one having an idea or tip? On Dec 21, 11:36 am, Dominik Erbsland <derbsl...@gmail.com> wrote: > I wanted to switch my perfectly runningGWTapplication fromGWT1.6 > toGWT2.0also also put it to the Google App Engine. > > I got many many errors from which I could fix the most. But I still > get an error which I can't find to fix. Here is the error I get > (snippet): > > Initializing AppEngine server > The server is running athttp://localhost:8888/ > 21.12.2009 10:22:14 com.google.apphosting.utils.jetty.JettyLogger warn > WARNUNG: Nested in javax.servlet.ServletException: init: > java.lang.ExceptionInInitializerError > at com.mysql.jdbc.NonRegisteringDriver.connect > (NonRegisteringDriver.java:283) > at java.sql.DriverManager.getConnection(Unknown Source) > at java.sql.DriverManager.getConnection(Unknown Source) > at ch.myrss.server.DAO.<init>(DAO.java:80) > at ch.myrss.server.DAO.getInstance(DAO.java:60) > at ch.myrss.server.RPCServiceImpl.<init>(RPCServiceImpl.java:50) > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native > Method) > at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown > Source) > at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown > Source) > at java.lang.reflect.Constructor.newInstance(Unknown Source) > at java.lang.Class.newInstance0(Unknown Source) > at java.lang.Class.newInstance(Unknown Source) > at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153) > at org.mortbay.jetty.servlet.ServletHolder.getServlet > (ServletHolder.java:339) > at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java: > 463) > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter > (ServletHandler.java:1093) > at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter > (ServeBlobFilter.java:51) > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter > (ServletHandler.java:1084) > at > com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter > (TransactionCleanupFilter.java:43) > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter > (ServletHandler.java:1084) > at com.google.appengine.tools.development.StaticFileFilter.doFilter > (StaticFileFilter.java:121) > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter > (ServletHandler.java:1084) > at org.mortbay.jetty.servlet.ServletHandler.handle > (ServletHandler.java:360) > at org.mortbay.jetty.security.SecurityHandler.handle > (SecurityHandler.java:216) > at org.mortbay.jetty.servlet.SessionHandler.handle > (SessionHandler.java:181) > at org.mortbay.jetty.handler.ContextHandler.handle > (ContextHandler.java:712) > at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java: > 405) > at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle > (DevAppEngineWebAppContext.java:70) > at org.mortbay.jetty.handler.HandlerWrapper.handle > (HandlerWrapper.java:139) > at com.google.appengine.tools.development.JettyContainerService > $ApiProxyHandler.handle(JettyContainerService.java:352) > at org.mortbay.jetty.handler.HandlerWrapper.handle > (HandlerWrapper.java:139) > at org.mortbay.jetty.Server.handle(Server.java:313) > at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java: > 506) > at org.mortbay.jetty.HttpConnection$RequestHandler.content > (HttpConnection.java:844) > at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:644) > at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211) > at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381) > at org.mortbay.io.nio.SelectChannelEndPoint.run > (SelectChannelEndPoint.java:396) > at org.mortbay.thread.BoundedThreadPool$PoolThread.run > (BoundedThreadPool.java:442) > Caused by: java.security.AccessControlException: access denied > (java.lang.RuntimePermission modifyThreadGroup) > at java.security.AccessControlContext.checkPermission(Unknown Source) > at java.security.AccessController.checkPermission(Unknown Source) > at java.lang.SecurityManager.checkPermission(Unknown Source) > at com.google.appengine.tools.development.DevAppServerFactory > $CustomSecurityManager.checkPermission(DevAppServerFactory.java:151) > at com.google.appengine.tools.development.DevAppServerFactory > $CustomSecurityManager.checkAccess(DevAppServerFactory.java:176) > at java.lang.ThreadGroup.checkAccess(Unknown Source) > at java.lang.Thread.init(Unknown Source) > at java.lang.Thread.<init>(Unknown Source) > at java.util.TimerThread.<init>(Unknown Source) > at java.util.Timer.<init>(Unknown Source) > at java.util.Timer.<init>(Unknown Source) > at com.mysql.jdbc.ConnectionImpl.<clinit>(ConnectionImpl.java:208) > ... 39 more > > In the Development Mode tab are no errors. > > The error must have something to do with the database. When I run it > in debug mode it crashes somewhere here: > > String userName = "root"; > String password = ""; > String url = > "jdbc:mysql://localhost/myrss?autoReconnect=true"; > Class.forName("com.mysql.jdbc.Driver").newInstance(); > con = DriverManager.getConnection(url, userName, > password); > System.out.println("Database connection established"); > > I put the mysql_connector jar into the project and classpath - I also > put the jar into the WAR directory in the project under the /lib/ > folder. > > When I create a separate java project and use the same code to connect > tomysqlthen it works just perfectly. Just in theGWTapplication I > get thisproblem. > > Thanks for any help! > Dominik
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