java.lang.NoClassDefFoundError: org/eclipse/jetty/util/thread/QueuedThreadPool$1

1、错误描述

[WARNING] FAILED qtp1691065417{8<=8<=8/254,0}: java.lang.NoClassDefFoundError: org/eclipse/jetty/util/thread/QueuedThreadPool$1
[WARNING] FAILED org.mortbay.jetty.plugin.JettyServer@7b8f6d05: java.lang.NoClassDefFoundError: org/eclipse/jetty/util/thread/QueuedThreadPool$1
Exception in thread "Thread-1" java.lang.NoClassDefFoundError: org/eclipse/jetty/util/thread/QueuedThreadPool$1
	at org.eclipse.jetty.util.thread.QueuedThreadPool.doStop(QueuedThreadPool.java:110)
	at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:80)
	at org.eclipse.jetty.server.Server.doStop(Server.java:307)
	at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:80)
	at org.eclipse.jetty.util.thread.ShutdownThread.run(ShutdownThread.java:124)
Caused by: java.lang.ClassNotFoundException: org.eclipse.jetty.util.thread.QueuedThreadPool$1
	at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
	at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:271)
	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:247)
	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:239)
	... 5 more

3、解决办法

原文：http://blog.csdn.net/you23hai45/article/details/50533228