I am having a similar problem. It's very weird. The test code I wrote works fine when I execute it directly, but when run from within the GWT framework I get a weird NullPointer exception thrown all seemingly caused by the exception below.
Have you had any lucky solving your problem? Thanks. Jeff The server is running at http://localhost:8080/ Apr 28, 2009 3:20:42 PM com.google.appengine.tools.development.ApiProxyLocalImpl log SEVERE: [1240946442913000] javax.servlet.ServletContext log: Exception while dispatching incoming RPC call com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract java.lang.String com.onenine.products.timekeeper.client.GreetingService.greetServer (java.lang.String)' threw an unexpected exception: java.lang.ExceptionInInitializerError at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure (RPC.java:360) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse (RPC.java:546) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall (RemoteServiceServlet.java:166) at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost (RemoteServiceServlet.java:86) at javax.servlet.http.HttpServlet.service(HttpServlet.java:713) at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java: 487) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter (ServletHandler.java:1093) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter (TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$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:54) at org.mortbay.jetty.handler.HandlerWrapper.handle (HandlerWrapper.java:139) at com.google.appengine.tools.development.JettyContainerService $ApiProxyHandler.handle(JettyContainerService.java:306) at org.mortbay.jetty.handler.HandlerWrapper.handle (HandlerWrapper.java:139) at org.mortbay.jetty.Server.handle(Server.java:313) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java: 506) at org.mortbay.jetty.HttpConnection$RequestHandler.content (HttpConnection.java:844) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:644) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:205) 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.lang.ExceptionInInitializerError at com.mysql.jdbc.NonRegisteringDriver.connect (NonRegisteringDriver.java:282) at java.sql.DriverManager.getConnection(Unknown Source) at java.sql.DriverManager.getConnection(Unknown Source) at com.onenine.products.timekeeper.server.GreetingServiceImpl.testLogin (GreetingServiceImpl.java:54) at com.onenine.products.timekeeper.server.GreetingServiceImpl.greetServer (GreetingServiceImpl.java:22) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse (RPC.java:527) ... 25 more 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:76) at com.google.appengine.tools.development.DevAppServerFactory $CustomSecurityManager.checkAccess(DevAppServerFactory.java:98) 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) ... 35 more On Apr 9, 7:52 am, martin <hotston...@googlemail.com> wrote: > Hi! > > I created a very simple test application with the Eclipse PlugIn from > a freshly installed GWT 1.6.4. When trying to connect to the database, > I get a java.lang.ExceptionInInitializerError calling getConnection: > > public ServiceImplementation() > { > try > { > Class.forName("com.mysql.jdbc.Driver"); > } catch (Exception e) > { > e.printStackTrace(); > System.exit(1); > } > > try > { > connection = > DriverManager.getConnection("jdbc:mysql://localhost/ > testdatabase", "root", "pwd"); > } catch (SQLException e) > { > e.printStackTrace(); > System.exit(1); > } > > } > > I am able to connect to the database using the MySQL Query Browser. > Also, the same server code worked with previous GWT versions. I use > Ubuntu 8.10, Eclipse 3.4.2. > > Any help is appreciated! > > Thanks, > Martin. > > The server is running athttp://localhost:8080/ > Apr 9, 2009 1:27:20 PM com.google.apphosting.utils.jetty.JettyLogger > warn > WARNING: Nested in javax.servlet.ServletException: init: > java.lang.ExceptionInInitializerError > at com.mysql.jdbc.NonRegisteringDriver.connect > (NonRegisteringDriver.java:282) > at java.sql.DriverManager.getConnection(DriverManager.java:582) > at java.sql.DriverManager.getConnection(DriverManager.java:185) > at com.testproject.server.ServiceImplementation.<init> > (ServiceImplementation.java:41) > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native > Method) > at sun.reflect.NativeConstructorAccessorImpl.newInstance > (NativeConstructorAccessorImpl.java:39) > at sun.reflect.DelegatingConstructorAccessorImpl.newInstance > (DelegatingConstructorAccessorImpl.java:27) > at java.lang.reflect.Constructor.newInstance(Constructor.java:513) > at java.lang.Class.newInstance0(Class.java:355) > at java.lang.Class.newInstance(Class.java:308) > 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.apphosting.utils.servlet.TransactionCleanupFilter.doFilter > (TransactionCleanupFilter.java:43) > 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:54) > at org.mortbay.jetty.handler.HandlerWrapper.handle > (HandlerWrapper.java:139) > at com.google.appengine.tools.development.JettyContainerService > $ApiProxyHandler.handle(JettyContainerService.java:306) > at org.mortbay.jetty.handler.HandlerWrapper.handle > (HandlerWrapper.java:139) > at org.mortbay.jetty.Server.handle(Server.java:313) > at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java: > 506) > at org.mortbay.jetty.HttpConnection$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 > (AccessControlContext.java:323) > at java.security.AccessController.checkPermission > (AccessController.java:546) > at java.lang.SecurityManager.checkPermission(SecurityManager.java: > 532) > at com.google.appengine.tools.development.DevAppServerFactory > $CustomSecurityManager.checkPermission(DevAppServerFactory.java:76) > at com.google.appengine.tools.development.DevAppServerFactory > $CustomSecurityManager.checkAccess(DevAppServerFactory.java:98) > at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:288) > at java.lang.Thread.init(Thread.java:332) > at java.lang.Thread.<init>(Thread.java:377) > at java.util.TimerThread.<init>(Timer.java:456) > at java.util.Timer.<init>(Timer.java:71) > at java.util.Timer.<init>(Timer.java:122) > at com.mysql.jdbc.ConnectionImpl.<clinit>(ConnectionImpl.java:208) > ... 33 more > Apr 9, 2009 1:27:20 PM com.google.apphosting.utils.jetty.JettyLogger > warn > WARNING: Nested in java.lang.ExceptionInInitializerError: > java.security.AccessControlException: access denied > (java.lang.RuntimePermission modifyThreadGroup) > at java.security.AccessControlContext.checkPermission > (AccessControlContext.java:323) > at java.security.AccessController.checkPermission > (AccessController.java:546) > at java.lang.SecurityManager.checkPermission(SecurityManager.java: > 532) > at com.google.appengine.tools.development.DevAppServerFactory > $CustomSecurityManager.checkPermission(DevAppServerFactory.java:76) > at com.google.appengine.tools.development.DevAppServerFactory > $CustomSecurityManager.checkAccess(DevAppServerFactory.java:98) > at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:288) > at java.lang.Thread.init(Thread.java:332) > at java.lang.Thread.<init>(Thread.java:377) > at java.util.TimerThread.<init>(Timer.java:456) > at java.util.Timer.<init>(Timer.java:71) > at java.util.Timer.<init>(Timer.java:122) > at com.mysql.jdbc.ConnectionImpl.<clinit>(ConnectionImpl.java:208) > at com.mysql.jdbc.NonRegisteringDriver.connect > (NonRegisteringDriver.java:282) > at java.sql.DriverManager.getConnection(DriverManager.java:582) > at java.sql.DriverManager.getConnection(DriverManager.java:185) > at com.testproject.server.ServiceImplementation.<init> > (ServiceImplementation.java:41) > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native > Method) > at sun.reflect.NativeConstructorAccessorImpl.newInstance > (NativeConstructorAccessorImpl.java:39) > at sun.reflect.DelegatingConstructorAccessorImpl.newInstance > (DelegatingConstructorAccessorImpl.java:27) > at java.lang.reflect.Constructor.newInstance(Constructor.java:513) > at java.lang.Class.newInstance0(Class.java:355) > at java.lang.Class.newInstance(Class.java:308) > at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153) > at org.mortbay.jetty.servlet.ServletHolder.getServlet > (ServletHolder.java:339) > at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java: > 463) > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter > (ServletHandler.java:1093) > at > com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter > (TransactionCleanupFilter.java:43) > 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:54) > at org.mortbay.jetty.handler.HandlerWrapper.handle > (HandlerWrapper.java:139) > at com.google.appengine.tools.development.JettyContainerService > $ApiProxyHandler.handle(JettyContainerService.java:306) > at org.mortbay.jetty.handler.HandlerWrapper.handle > (HandlerWrapper.java:139) > at org.mortbay.jetty.Server.handle(Server.java:313) > at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java: > 506) > at org.mortbay.jetty.HttpConnection$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$PoolThread.run > (BoundedThreadPool.java:442) > Apr 9, 2009 1:27:20 PM com.google.apphosting.utils.jetty.JettyLogger > warn > WARNING: /testproject/testprojectservlet > java.lang.ExceptionInInitializerError > at com.mysql.jdbc.NonRegisteringDriver.connect > (NonRegisteringDriver.java:282) > at java.sql.DriverManager.getConnection(DriverManager.java:582) > at java.sql.DriverManager.getConnection(DriverManager.java:185) > at com.testproject.server.ServiceImplementation.<init> > (ServiceImplementation.java:41) > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native > Method) > at sun.reflect.NativeConstructorAccessorImpl.newInstance > (NativeConstructorAccessorImpl.java:39) > at sun.reflect.DelegatingConstructorAccessorImpl.newInstance > (DelegatingConstructorAccessorImpl.java:27) > at java.lang.reflect.Constructor.newInstance(Constructor.java:513) > at java.lang.Class.newInstance0(Class.java:355) > at java.lang.Class.newInstance(Class.java:308) > at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153) > at org.mortbay.jetty.servlet.ServletHolder.getServlet > (ServletHolder.java:339) > at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java: > 463) > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter > (ServletHandler.java:1093) > at > com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter > (TransactionCleanupFilter.java:43) > 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:54) > at org.mortbay.jetty.handler.HandlerWrapper.handle > (HandlerWrapper.java:139) > at com.google.appengine.tools.development.JettyContainerService > $ApiProxyHandler.handle(JettyContainerService.java:306) > at org.mortbay.jetty.handler.HandlerWrapper.handle > (HandlerWrapper.java:139) > at org.mortbay.jetty.Server.handle(Server.java:313) > at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java: > 506) > at org.mortbay.jetty.HttpConnection$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 > (AccessControlContext.java:323) > at java.security.AccessController.checkPermission > (AccessController.java:546) > at java.lang.SecurityManager.checkPermission(SecurityManager.java: > 532) > at com.google.appengine.tools.development.DevAppServerFactory > $CustomSecurityManager.checkPermission(DevAppServerFactory.java:76) > at com.google.appengine.tools.development.DevAppServerFactory > $CustomSecurityManager.checkAccess(DevAppServerFactory.java:98) > at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:288) > at java.lang.Thread.init(Thread.java:332) > at java.lang.Thread.<init>(Thread.java:377) > at java.util.TimerThread.<init>(Timer.java:456) > at java.util.Timer.<init>(Timer.java:71) > at java.util.Timer.<init>(Timer.java:122) > at com.mysql.jdbc.ConnectionImpl.<clinit>(ConnectionImpl.java:208) > ... 33 more > Apr 9, 2009 1:27:20 PM com.google.apphosting.utils.jetty.JettyLogger > warn > WARNING: Nested in java.lang.ExceptionInInitializerError: > java.security.AccessControlException: access denied > (java.lang.RuntimePermission modifyThreadGroup) > at java.security.AccessControlContext.checkPermission > (AccessControlContext.java:323) > at java.security.AccessController.checkPermission > (AccessController.java:546) > at java.lang.SecurityManager.checkPermission(SecurityManager.java: > 532) > at com.google.appengine.tools.development.DevAppServerFactory > $CustomSecurityManager.checkPermission(DevAppServerFactory.java:76) > at com.google.appengine.tools.development.DevAppServerFactory > $CustomSecurityManager.checkAccess(DevAppServerFactory.java:98) > at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:288) > at java.lang.Thread.init(Thread.java:332) > at java.lang.Thread.<init>(Thread.java:377) > at java.util.TimerThread.<init>(Timer.java:456) > at java.util.Timer.<init>(Timer.java:71) > at java.util.Timer.<init>(Timer.java:122) > at com.mysql.jdbc.ConnectionImpl.<clinit>(ConnectionImpl.java:208) > at com.mysql.jdbc.NonRegisteringDriver.connect > (NonRegisteringDriver.java:282) > at java.sql.DriverManager.getConnection(DriverManager.java:582) > at java.sql.DriverManager.getConnection(DriverManager.java:185) > at com.testproject.server.ServiceImplementation.<init> > (ServiceImplementation.java:41) > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native > Method) > at sun.reflect.NativeConstructorAccessorImpl.newInstance > (NativeConstructorAccessorImpl.java:39) > at sun.reflect.DelegatingConstructorAccessorImpl.newInstance > (DelegatingConstructorAccessorImpl.java:27) > at java.lang.reflect.Constructor.newInstance(Constructor.java:513) > at java.lang.Class.newInstance0(Class.java:355) > at java.lang.Class.newInstance(Class.java:308) > at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153) > at org.mortbay.jetty.servlet.ServletHolder.getServlet > (ServletHolder.java:339) > at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java: > 463) > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter > (ServletHandler.java:1093) > at > com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter > (TransactionCleanupFilter.java:43) > 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:54) > at org.mortbay.jetty.handler.HandlerWrapper.handle > (HandlerWrapper.java:139) > at com.google.appengine.tools.development.JettyContainerService > $ApiProxyHandler.handle(JettyContainerService.java:306) > at org.mortbay.jetty.handler.HandlerWrapper.handle > (HandlerWrapper.java:139) > at org.mortbay.jetty.Server.handle(Server.java:313) > at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java: > 506) > at org.mortbay.jetty.HttpConnection$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) --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. 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