title: Eclipse can't start after update
body: <p>After the eclipse update, it can't start up again. Also, it has a warning to check the log.
  But I don't know how to fix this problem through the log.
  Following is the log.</p>
  
  <pre><code>!SESSION 2012-10-15 08:21:47.367 -----------------------------------------------
  eclipse.buildId=M20120914-1800
  java.version=1.7.0_01
  java.vendor=Oracle Corporation
  BootLoader constants: OS=win32, ARCH=x86_64, WS=win32
  Command-line arguments:  -os win32 -ws win32 -arch x86_64
  
  !ENTRY org.eclipse.equinox.event 2 0 2012-10-15 08:21:48.459
  !MESSAGE [SCR] Found components with duplicated names! Details: 
  Component1 : Component[
      name = org.eclipse.equinox.event
      activate = activate
      deactivate = deactivate
      modified = 
      configuration-policy = optional
      factory = null
      autoenable = true
      immediate = false
      implementation = org.eclipse.equinox.internal.event.EventComponent
      state = Unsatisfied
      properties = 
      serviceFactory = false
      serviceInterface = [org.osgi.service.event.EventAdmin]
      references = null
      located in bundle = org.eclipse.equinox.event_1.2.100.v20110502 [270]
  ]
  Component2: Component[
      name = org.eclipse.equinox.event
      activate = activate
      deactivate = deactivate
      modified = 
      configuration-policy = optional
      factory = null
      autoenable = true
      immediate = false
      implementation = org.eclipse.equinox.internal.event.EventComponent
      state = Unsatisfied
      properties = 
      serviceFactory = false
      serviceInterface = [org.osgi.service.event.EventAdmin]
      references = null
      located in bundle = org.eclipse.equinox.event_1.2.200.v20120522-2049 [89]
  ]  
  
  !ENTRY org.eclipse.equinox.p2.transport.ecf 2 0 2012-10-15 08:21:48.474
  !MESSAGE [SCR] Found components with duplicated names! Details: 
  Component1 : Component[
      name = org.eclipse.equinox.p2.transport.ecf
      activate = activate
      deactivate = deactivate
      modified = 
      configuration-policy = optional
      factory = null
      autoenable = true
      immediate = false
      implementation = org.eclipse.equinox.internal.p2.transport.ecf.ECFTransportComponent
      state = Unsatisfied
      properties = {p2.agent.servicename=org.eclipse.equinox.internal.p2.repository.Transport}
      serviceFactory = false
      serviceInterface = [org.eclipse.equinox.p2.core.spi.IAgentServiceFactory]
      references = null
      located in bundle = org.eclipse.equinox.p2.transport.ecf_1.0.0.v20111128-0624 [275]
  ]
  Component2: Component[
      name = org.eclipse.equinox.p2.transport.ecf
      activate = activate
      deactivate = deactivate
      modified = 
      configuration-policy = optional
      factory = null
      autoenable = true
      immediate = false
      implementation = org.eclipse.equinox.internal.p2.transport.ecf.ECFTransportComponent
      state = Unsatisfied
      properties = {p2.agent.servicename=org.eclipse.equinox.internal.p2.repository.Transport}
      serviceFactory = false
      serviceInterface = [org.eclipse.equinox.p2.core.spi.IAgentServiceFactory]
      references = null
      located in bundle = org.eclipse.equinox.p2.transport.ecf_1.0.100.v20120305-0333 [120]
  ]  
  
  !ENTRY org.eclipse.core.resources 2 10035 2012-10-15 08:21:49.535
  !MESSAGE The workspace exited with unsaved changes in the previous session; refreshing workspace to recover changes.
  
  !ENTRY org.eclipse.e4.ui.workbench 4 0 2012-10-15 08:21:52.000
  !MESSAGE Unable to create class 'org.eclipse.e4.core.commands.CommandServiceAddon' from bundle '53'
  !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:859)
      at org.eclipse.e4.core.internal.di.InjectorImpl.inject(InjectorImpl.java:111)
      at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:319)
      at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:253)
      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:254)
      at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:557)
      at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
      at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)
      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)
      at org.eclipse.equinox.launcher.Main.main(Main.java:1414)
  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:566)
      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)
      ... 27 more
  </code></pre>
  
  <p>Basically, it just a part in the log file. From here, I found some post and tried:</p>
  
  <p>1) eclipse -clean
  2) delete .snap
  3) delete workbench.xmi
  4) rename org.eclipse.core.resources
  etc..</p>
  
  <p>Unfortunately, they are not work. </p>