title: Eclipse won't start but no error is shown
body: <p>Any idea why my Eclipse isn't starting?</p>
  
  <p>The <code>eclipse.ini</code> has the following:</p>
  
  <pre><code>-startup plugins/org.eclipse.equinox.launcher_1.1.0.v20100507.jar
  --launcher.library plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.0.v20100503
  -product org.eclipse.epp.package.jee.product
  --launcher.defaultAction openFile
  --launcher.XXMaxPermSize 256M
  -showsplash org.eclipse.platform
  --launcher.XXMaxPermSize 256m
  --launcher.defaultAction openFile
  -vmargs
  -Dosgi.requiredJavaVersion=1.5
  -Xms40m
  -Xmx512m
  </code></pre>
  
  <p>The error log in workspace log file shows this</p>
  
  <blockquote>
    <p>!ENTRY org.eclipse.core.resources 2 10035 2011-10-21 12:03:18.134
    !MESSAGE The workspace exited with unsaved changes in the previous
    session; refreshing workspace to recover changes.</p>
    
    <p>!ENTRY org.eclipse.osgi 4 0 2011-10-21 12:03:19.447 !MESSAGE An error
    occurred while automatically activating bundle
    org.eclipse.core.resources (68). !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:806)
      at
    org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:755)
      at
    org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:370)
      at
    org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:284)
      at
    org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:417)
      at
    org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:265)
      at
    org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:106)
      at
    org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:453)
      at
    org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)
      at
    org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:393)
      at
    org.eclipse.osgi.internal.loader.SingleSourcePackage.loadClass(SingleSourcePackage.java:33)
      at
    org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:466)
      at
    org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:422)
      at
    org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:410)
      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:116)
      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:369)
      at
    org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
      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:619)  at
    org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)     at
    org.eclipse.equinox.launcher.Main.run(Main.java:1407)     at
    org.eclipse.equinox.launcher.Main.main(Main.java:1383) Caused by:
    org.eclipse.core.internal.dtree.ObjectNotFoundException: Tree element
    '/webtop/.classpath' not found.   at
    org.eclipse.core.internal.dtree.AbstractDataTree.handleNotFound(AbstractDataTree.java:257)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.getData(DeltaDataTree.java:585)
      at
    org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:50)
      at
    org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:47)
      at
    org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:47)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.asBackwardDelta(DeltaDataTree.java:88)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:816)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:815)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:815)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:792)
      at
    org.eclipse.core.internal.watson.ElementTree.immutable(ElementTree.java:517)
      at
    org.eclipse.core.internal.resources.SaveManager.restore(SaveManager.java:688)
      at
    org.eclipse.core.internal.resources.SaveManager.startup(SaveManager.java:1503)
      at
    org.eclipse.core.internal.resources.Workspace.startup(Workspace.java:2134)
      at
    org.eclipse.core.internal.resources.Workspace.open(Workspace.java:1883)
      at
    org.eclipse.core.resources.ResourcesPlugin.start(ResourcesPlugin.java:406)
      at
    org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:783)
      at java.security.AccessController.doPrivileged(Native Method)   at
    org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:774)
      ... 29 more Root exception:
    org.eclipse.core.internal.dtree.ObjectNotFoundException: Tree element
    '/webtop/.classpath' not found.   at
    org.eclipse.core.internal.dtree.AbstractDataTree.handleNotFound(AbstractDataTree.java:257)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.getData(DeltaDataTree.java:585)
      at
    org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:50)
      at
    org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:47)
      at
    org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:47)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.asBackwardDelta(DeltaDataTree.java:88)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:816)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:815)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:815)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:792)
      at
    org.eclipse.core.internal.watson.ElementTree.immutable(ElementTree.java:517)
      at
    org.eclipse.core.internal.resources.SaveManager.restore(SaveManager.java:688)
      at
    org.eclipse.core.internal.resources.SaveManager.startup(SaveManager.java:1503)
      at
    org.eclipse.core.internal.resources.Workspace.startup(Workspace.java:2134)
      at
    org.eclipse.core.internal.resources.Workspace.open(Workspace.java:1883)
      at
    org.eclipse.core.resources.ResourcesPlugin.start(ResourcesPlugin.java:406)
      at
    org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:783)
      at java.security.AccessController.doPrivileged(Native Method)   at
    org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:774)
      at
    org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:755)
      at
    org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:370)
      at
    org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:284)
      at
    org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:417)
      at
    org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:265)
      at
    org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:106)
      at
    org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:453)
      at
    org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)
      at
    org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:393)
      at
    org.eclipse.osgi.internal.loader.SingleSourcePackage.loadClass(SingleSourcePackage.java:33)
      at
    org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:466)
      at
    org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:422)
      at
    org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:410)
      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:116)
      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:369)
      at
    org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
      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:619)  at
    org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)     at
    org.eclipse.equinox.launcher.Main.run(Main.java:1407)     at
    org.eclipse.equinox.launcher.Main.main(Main.java:1383)</p>
    
    <p>!ENTRY org.eclipse.osgi 4 0 2011-10-21 12:03:19.467 !MESSAGE
    Application error !STACK 1 java.lang.NoClassDefFoundError:
    org/eclipse/core/resources/IContainer     at
    org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:116)
      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:369)
      at
    org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
      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:619)  at
    org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)     at
    org.eclipse.equinox.launcher.Main.run(Main.java:1407)     at
    org.eclipse.equinox.launcher.Main.main(Main.java:1383) Caused by:
    org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter$TerminatingClassNotFoundException:
    An error occurred while automatically activating bundle
    org.eclipse.core.resources (68).  at
    org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:121)
      at
    org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:453)
      at
    org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)
      at
    org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:393)
      at
    org.eclipse.osgi.internal.loader.SingleSourcePackage.loadClass(SingleSourcePackage.java:33)
      at
    org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:466)
      at
    org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:422)
      at
    org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:410)
      at
    org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
      at java.lang.ClassLoader.loadClass(Unknown Source)  ... 14 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:806)
      at
    org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:755)
      at
    org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:370)
      at
    org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:284)
      at
    org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:417)
      at
    org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:265)
      at
    org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:106)
      ... 23 more Caused by:
    org.eclipse.core.internal.dtree.ObjectNotFoundException: Tree element
    '/webtop/.classpath' not found.   at
    org.eclipse.core.internal.dtree.AbstractDataTree.handleNotFound(AbstractDataTree.java:257)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.getData(DeltaDataTree.java:585)
      at
    org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:50)
      at
    org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:47)
      at
    org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:47)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.asBackwardDelta(DeltaDataTree.java:88)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:816)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:815)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:815)
      at
    org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:792)
      at
    org.eclipse.core.internal.watson.ElementTree.immutable(ElementTree.java:517)
      at
    org.eclipse.core.internal.resources.SaveManager.restore(SaveManager.java:688)
      at
    org.eclipse.core.internal.resources.SaveManager.startup(SaveManager.java:1503)
      at
    org.eclipse.core.internal.resources.Workspace.startup(Workspace.java:2134)
      at
    org.eclipse.core.internal.resources.Workspace.open(Workspace.java:1883)
      at
    org.eclipse.core.resources.ResourcesPlugin.start(ResourcesPlugin.java:406)
      at
    org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:783)
      at java.security.AccessController.doPrivileged(Native Method)   at
    org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:774)
      ... 29 more</p>
  </blockquote>