ECLIPSE崩溃启动不起来提示看log

eclipse崩溃了，并且提示说详细信息参见C:\Users\username\Workspaces\MyEclipse 10\.metadata\.log文件中的记录。

!SESSION 2015-12-14 11:06:43.097 -----------------------------------------------
eclipse.buildId=unknown
java.version=1.6.0_13
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=zh_CN
Command-line arguments:  -os win32 -ws win32 -arch x86_64

This is a continuation of log file C:\Users\username\Workspaces\MyEclipse 10\.metadata\.bak_0.log
Created Time: 2015-12-14 11:07:48.353

!ENTRY org.eclipse.core.resources 4 566 2015-12-14 11:07:48.353
!MESSAGE <strong><span style="color:#ff0000;">Cannot set lower sequence number for root (previous: 29, new: 27). Ignoring the new value.</span></strong>
!STACK 0
java.lang.IllegalArgumentException: Cannot set lower sequence number for root (previous: 29, new: 27). Ignoring the new value.
	at org.eclipse.core.internal.resources.SaveManager$MasterTable.put(SaveManager.java:50)
	at java.util.Properties.load0(Properties.java:376)
	at java.util.Properties.load(Properties.java:325)
	at org.eclipse.core.internal.resources.SaveManager.restoreMasterTable(SaveManager.java:829)
	at org.eclipse.core.internal.resources.SaveManager.restore(SaveManager.java:684)
	at org.eclipse.core.internal.resources.SaveManager.startup(SaveManager.java:1527)
	at org.eclipse.core.internal.resources.Workspace.startup(Workspace.java:2503)
	at org.eclipse.core.internal.resources.Workspace.open(Workspace.java:2251)
	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:299)
	at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:440)
	at org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:268)
	at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:107)
	at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:462)
	at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)
	at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:400)
	at org.eclipse.osgi.internal.loader.SingleSourcePackage.loadClass(SingleSourcePackage.java:35)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:473)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:429)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:417)
	at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
	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: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:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	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)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1386)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.genuitec.pulse.eclipse.launcher.Main.main(Main.java:110)

!ENTRY org.eclipse.core.resources 4 566 2015-12-14 11:07:48.354
!MESSAGE Cannot set lower sequence number for root (previous: 29, new: 24). Ignoring the new value.
!STACK 0
java.lang.IllegalArgumentException: Cannot set lower sequence number for 
......

解决方案比较简单：

Delete the file .metadata/.plugins/org.eclipse.core.resources/.snap

重启eclipse即可