title: Eclipse error upon start up
body: <p>Eclipse won't work after my PC shutdown unexpectedly. Here is the error that corresponds to the log file written when I tried to run Eclipse. </p>
  
  <pre><code>!SESSION 2014-08-20 14:05:14.763 -----------------------------------------------
  eclipse.buildId=4.3.0.M20130911-1000
  java.version=1.7.0_45
  java.vendor=Oracle Corporation
  BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_US
  Framework arguments:  -product org.eclipse.epp.package.jee.product
  Command-line arguments:  -os win32 -ws win32 -arch x86 -product        
  org.eclipse.epp.package.jee.product
  
  !ENTRY org.eclipse.osgi 4 0 2014-08-20 14:05:18.319
  !MESSAGE An error occurred while automatically activating bundle       
  org.eclipse.core.resources (82).
  !STACK 0
  org.osgi.framework.BundleException: Exception in org.eclipse.core.resources.ResourcesPlugin.start() of bundle org.eclipse.core.resources.
      at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:734)
      at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
      at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
      at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:300)
      at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:478)
      at org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:263)
      at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:109)
      at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:469)
      at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)
      at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:395)
      at org.eclipse.osgi.internal.loader.SingleSourcePackage.loadClass(SingleSourcePackage.java:35)
      at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:461)
      at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:421)
      at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:412)
      at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
      at java.lang.ClassLoader.loadClass(Unknown Source)
      at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:125)
      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:354)
      at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181)
      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:636)
      at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
      at org.eclipse.equinox.launcher.Main.run(Main.java:1450)
  Caused by: org.eclipse.core.internal.resources.ResourceException: Problems reading project tree.
      at org.eclipse.core.internal.resources.WorkspaceTreeReader_2.readTree(WorkspaceTreeReader_2.java:125)
      at org.eclipse.core.internal.resources.SaveManager.restoreTree(SaveManager.java:1000)
      at org.eclipse.core.internal.resources.SaveManager.restore(SaveManager.java:687)
      at org.eclipse.core.internal.resources.SaveManager.startup(SaveManager.java:1530)
      at org.eclipse.core.internal.resources.Workspace.startup(Workspace.java:2503)
      at org.eclipse.core.internal.resources.Workspace.open(Workspace.java:2252)
      at org.eclipse.core.resources.ResourcesPlugin.start(ResourcesPlugin.java:439)
      at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
      at java.security.AccessController.doPrivileged(Native Method)
      at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
      ... 28 more
  Caused by: java.io.IOException: Unknown format.
      at org.eclipse.core.internal.watson.ElementTreeReader.getReader(ElementTreeReader.java:76)
      at org.eclipse.core.internal.watson.ElementTreeReader.readDelta(ElementTreeReader.java:85)
      at org.eclipse.core.internal.watson.ElementTreeReaderImpl_1.readDeltaChain(ElementTreeReaderImpl_1.java:88)
      at org.eclipse.core.internal.watson.ElementTreeReader.readDeltaChain(ElementTreeReader.java:110)
      at org.eclipse.core.internal.resources.WorkspaceTreeReader_1.readTrees(WorkspaceTreeReader_1.java:233)
      at org.eclipse.core.internal.resources.WorkspaceTreeReader_2.readTree(WorkspaceTreeReader_2.java:104)
      ... 37 more
  Root exception:
  org.eclipse.core.internal.resources.ResourceException(null)[567]: java.io.IOException: Unknown format.
      at org.eclipse.core.internal.watson.ElementTreeReader.getReader(ElementTreeReader.java:76)
      at org.eclipse.core.internal.watson.ElementTreeReader.readDelta(ElementTreeReader.java:85)
      at org.eclipse.core.internal.watson.ElementTreeReaderImpl_1.readDeltaChain(ElementTreeReaderImpl_1.java:88)
      at org.eclipse.core.internal.watson.ElementTreeReader.readDeltaChain(ElementTreeReader.java:110)
      at org.eclipse.core.internal.resources.WorkspaceTreeReader_1.readTrees(WorkspaceTreeReader_1.java:233)
      at org.eclipse.core.internal.resources.WorkspaceTreeReader_2.readTree(WorkspaceTreeReader_2.java:104)
      at org.eclipse.core.internal.resources.SaveManager.restoreTree(SaveManager.java:1000)
      at org.eclipse.core.internal.resources.SaveManager.restore(SaveManager.java:687)
      at org.eclipse.core.internal.resources.SaveManager.startup(SaveManager.java:1530)
      at org.eclipse.core.internal.resources.Workspace.startup(Workspace.java:2503)
      at org.eclipse.core.internal.resources.Workspace.open(Workspace.java:2252)
      at org.eclipse.core.resources.ResourcesPlugin.start(ResourcesPlugin.java:439)
      at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
      at java.security.AccessController.doPrivileged(Native Method)
      at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
      at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
      at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
      at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:300)
      at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:478)
      at org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:263)
      at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:109)
      at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:469)
      at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)
      at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:395)
      at org.eclipse.osgi.internal.loader.SingleSourcePackage.loadClass(SingleSourcePackage.java:35)
      at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:461)
      at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:421)
      at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:412)
      at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
      at java.lang.ClassLoader.loadClass(Unknown Source)
      at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:125)
      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:354)
      at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181)
      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:636)
      at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
      at org.eclipse.equinox.launcher.Main.run(Main.java:1450)
  
  !ENTRY org.eclipse.osgi 4 0 2014-08-20 14:05:18.336
  !MESSAGE Application error
  !STACK 1
  java.lang.NoClassDefFoundError: org/eclipse/core/resources/IContainer
      at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:125)
      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:354)
      at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181)
      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:636)
      at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
      at org.eclipse.equinox.launcher.Main.run(Main.java:1450)
  Caused by: org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter$TerminatingClassNotFoundException: An error occurred while automatically activating bundle org.eclipse.core.resources (82).
      at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:124)
      at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:469)
      at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)
      at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:395)
      at org.eclipse.osgi.internal.loader.SingleSourcePackage.loadClass(SingleSourcePackage.java:35)
      at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:461)
      at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:421)
      at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:412)
      at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
      at java.lang.ClassLoader.loadClass(Unknown Source)
      ... 13 more
  Caused by: org.osgi.framework.BundleException: Exception in org.eclipse.core.resources.ResourcesPlugin.start() of bundle org.eclipse.core.resources.
      at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:734)
      at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
      at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
      at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:300)
      at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:478)
      at org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:263)
      at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:109)
      ... 22 more
  Caused by: org.eclipse.core.internal.resources.ResourceException: Problems reading project tree.
      at org.eclipse.core.internal.resources.WorkspaceTreeReader_2.readTree(WorkspaceTreeReader_2.java:125)
      at org.eclipse.core.internal.resources.SaveManager.restoreTree(SaveManager.java:1000)
      at org.eclipse.core.internal.resources.SaveManager.restore(SaveManager.java:687)
      at org.eclipse.core.internal.resources.SaveManager.startup(SaveManager.java:1530)
      at org.eclipse.core.internal.resources.Workspace.startup(Workspace.java:2503)
      at org.eclipse.core.internal.resources.Workspace.open(Workspace.java:2252)
      at org.eclipse.core.resources.ResourcesPlugin.start(ResourcesPlugin.java:439)
      at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
      at java.security.AccessController.doPrivileged(Native Method)
      at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
      ... 28 more
  Caused by: java.io.IOException: Unknown format.
      at org.eclipse.core.internal.watson.ElementTreeReader.getReader(ElementTreeReader.java:76)
      at org.eclipse.core.internal.watson.ElementTreeReader.readDelta(ElementTreeReader.java:85)
      at org.eclipse.core.internal.watson.ElementTreeReaderImpl_1.readDeltaChain(ElementTreeReaderImpl_1.java:88)
      at org.eclipse.core.internal.watson.ElementTreeReader.readDeltaChain(ElementTreeReader.java:110)
      at org.eclipse.core.internal.resources.WorkspaceTreeReader_1.readTrees(WorkspaceTreeReader_1.java:233)
      at org.eclipse.core.internal.resources.WorkspaceTreeReader_2.readTree(WorkspaceTreeReader_2.java:104)
      ... 37 more
  </code></pre>