title: Eclipse Juno unable to open my workspace after the plugin update
body: <p>Just I got update the plugin in eclipse juno.</p>
  
  <p>More specifically the <a href="https://developers.google.com/eclipse/docs/install-eclipse-4.2">GWT 2.5 development plugin</a>.</p>
  
  <p>After I installed in it successfully,and its asked for restart.After that it exits and when tried to restart got an error </p>
  
  <pre><code>"Unable to open the workbench,see the error logs"
  </code></pre>
  
  <p>Sorry for dumping all the  Exception  from Logs,i did'nt find any clues here.</p>
  
  <pre><code>!SESSION 2013-08-15 16:00:26.913 -----------------------------------------------
  eclipse.buildId=I20121031-2000
  java.version=1.7.0_25
  java.vendor=Oracle Corporation
  BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_US
  Framework arguments:  -product org.eclipse.epp.package.java.product
  Command-line arguments:  -os win32 -ws win32 -arch x86 -product org.eclipse.epp.package.java.product
  
  !ENTRY org.eclipse.e4.ui.workbench 4 0 2013-08-15 16:00:29.745
  !MESSAGE Unable to create class 'org.eclipse.e4.core.commands.CommandServiceAddon' from bundle '85'
  !STACK 0
  org.eclipse.e4.core.di.InjectionException: java.lang.ClassCastException: Cannot cast org.eclipse.core.commands.CommandManager to org.eclipse.core.commands.CommandManager
      at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:63)
      at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:861)
      at org.eclipse.e4.core.internal.di.InjectorImpl.inject(InjectorImpl.java:113)
      at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:321)
      at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:255)
      at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:185)
      at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:105)
      at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:71)
      at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:49)
      at org.eclipse.e4.ui.internal.workbench.swt.E4Application.createE4Workbench(E4Application.java:258)
      at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:556)
      at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
      at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:542)
      at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
      at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
      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:353)
      at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
      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 org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
      at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
      at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
  Caused by: java.lang.ClassCastException: Cannot cast org.eclipse.core.commands.CommandManager to org.eclipse.core.commands.CommandManager
      at java.lang.Class.cast(Unknown Source)
      at org.eclipse.e4.core.internal.contexts.EclipseContext.get(EclipseContext.java:557)
      at org.eclipse.e4.core.commands.CommandServiceAddon.init(CommandServiceAddon.java:30)
      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 org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56)
      ... 26 more
  
  !ENTRY org.eclipse.e4.ui.workbench 4 0 2013-08-15 16:00:29.753
  !MESSAGE Unable to create class 'org.eclipse.e4.ui.internal.workbench.addons.CommandProcessingAddon' from bundle '98'
  !STACK 0
  org.eclipse.e4.core.di.InjectionException: Unable to process "CommandProcessingAddon.commandService": no actual value was found for the argument "ECommandService".
      at org.eclipse.e4.core.internal.di.InjectorImpl.reportUnresolvedArgument(InjectorImpl.java:396)
      at org.eclipse.e4.core.internal.di.InjectorImpl.resolveRequestorArgs(InjectorImpl.java:387)
      at org.eclipse.e4.core.internal.di.InjectorImpl.inject(InjectorImpl.java:102)
      at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:321)
      at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:255)
      at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:185)
      at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:105)
      at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:71)
      at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:49)
      at org.eclipse.e4.ui.internal.workbench.swt.E4Application.createE4Workbench(E4Application.java:258)
      at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:556)
      at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
      at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:542)
      at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
      at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
      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:353)
      at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
      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 org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
      at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
      at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
  
  !ENTRY org.eclipse.e4.ui.workbench 4 0 2013-08-15 16:00:29.758
  !MESSAGE Unable to create class 'org.eclipse.e4.ui.workbench.swt.util.BindingProcessingAddon' from bundle '101'
  !STACK 0
  org.eclipse.e4.core.di.InjectionException: Unable to process "BindingProcessingAddon.commandService": no actual value was found for the argument "ECommandService".
      at org.eclipse.e4.core.internal.di.InjectorImpl.reportUnresolvedArgument(InjectorImpl.java:396)
      at org.eclipse.e4.core.internal.di.InjectorImpl.resolveRequestorArgs(InjectorImpl.java:387)
      at org.eclipse.e4.core.internal.di.InjectorImpl.inject(InjectorImpl.java:102)
      at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:321)
      at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:255)
      at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:185)
      at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:105)
      at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:71)
      at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:49)
      at org.eclipse.e4.ui.internal.workbench.swt.E4Application.createE4Workbench(E4Application.java:258)
      at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:556)
      at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
      at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:542)
      at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
      at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
      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:353)
      at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
      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 org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
      at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
      at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
  </code></pre>