In Eclipse 3.7 on Ubuntu with App Engine SDK version 1.6 installed,
I'm unable to log into Google. The "Sign in to Google" button on the
statusbar doesn't work. I switched to Plug-in Development perspective
in Eclipse and realize when i press that button, I get the error
pasted below. Please advise how to fix this.
Unhandled event loop exception
java.lang.LinkageError: loader constraint violation: when resolving
method
"com.google.gdt.eclipse.login.LoginCallbackServer.addServlet(Ljava/
lang/String;Ljavax/servlet/Servlet;)V" the class loader (instance of
org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader) of the
current class, com/google/gdt/eclipse/login/LoginCallbackServer, and
the class loader (instance of org/eclipse/osgi/internal/baseadaptor/
DefaultClassLoader) for resolved class, com/google/gdt/eclipse/login/
LoginCallbackServer, have different Class objects for the type javax/
servlet/Servlet used in the signature
at
com.google.gdt.eclipse.login.LoginCallbackServer.<init>(LoginCallbackServer.java:
136)
at com.google.gdt.eclipse.login.GoogleLogin.logIn(GoogleLogin.java:
394)
at com.google.gdt.eclipse.login.GoogleLogin.logIn(GoogleLogin.java:
370)
at com.google.gdt.eclipse.login.ui.LoginTrimContribution
$1.mouseUp(LoginTrimContribution.java:90)
at
org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:
219)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1258)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:
3588)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3209)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:
2696)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)
at
org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:
332)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:
667)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:
149)
at
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:
123)
at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:
196)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:
110)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:
79)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:
344)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:
179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
43)
at java.lang.reflect.Method.invoke(Method.java:616)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
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