Eclipse (Java) Error: Job found still running after platform shutdown：错误日志如下

!ENTRY org.eclipse.mylyn.monitor.ui 4 0 2012-11-10 22:10:36.569
!MESSAGE Monitor UI stop failed
!STACK 0
java.lang.NullPointerException
    at org.eclipse.mylyn.internal.monitor.ui.ActivityContextManager.stop(ActivityContextManager.java:152)
    at org.eclipse.mylyn.internal.monitor.ui.MonitorUiPlugin.stop(MonitorUiPlugin.java:157)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl$2.run(BundleContextImpl.java:771)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.stop(BundleContextImpl.java:764)
    at org.eclipse.osgi.framework.internal.core.BundleHost.stopWorker(BundleHost.java:510)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.suspend(AbstractBundle.java:566)
    at org.eclipse.osgi.framework.internal.core.Framework.suspendBundle(Framework.java:1206)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.decFWSL(StartLevelManager.java:592)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:257)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.shutdown(StartLevelManager.java:215)
    at org.eclipse.osgi.framework.internal.core.InternalSystemBundle.suspend(InternalSystemBundle.java:284)
    at org.eclipse.osgi.framework.internal.core.Framework.shutdown(Framework.java:692)
    at org.eclipse.osgi.framework.internal.core.Framework.close(Framework.java:600)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.shutdown(EclipseStarter.java:399)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:199)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    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.core.jobs 2 2 2012-11-10 22:10:36.917
!MESSAGE Job found still running after platform shutdown.  Jobs should be canceled by the plugin that scheduled them during shutdown: org.eclipse.mylyn.internal.tasks.ui.TasksUiPlugin$TasksUiInitializationJob

!ENTRY org.eclipse.core.jobs 2 2 2012-11-10 22:10:36.918
!MESSAGE Job found still running after platform shutdown.  Jobs should be canceled by the plugin that scheduled them during shutdown: org.eclipse.epp.internal.mpc.ui.wizards.MarketplaceDropAdapter$1

在StackOverflow 看到的解决法案：Deleting workspace/.metadata/.plugins/org.eclipse.e4.workbench/workbench.xmi solved the problem.

http://stackoverflow.com/questions/13328278/eclipse-c-c-error-job-found-still-running-after-platform-shutdown